1
|
Yang B, Hou M, Gao S. Total Synthesis of Polycyclic Natural Products via Photoenolization/Diels-Alder Reaction. Acc Chem Res 2025; 58:1308-1322. [PMID: 40172047 DOI: 10.1021/acs.accounts.5c00084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2025]
Abstract
ConspectusPolycyclic ring systems represent the most common structural features of drug molecules and natural products. Chemical synthesis of complex polycyclic molecules with multiple stereogenic centers, especially quaternary carbon stereocenters, has been a significant challenge in the field of total synthesis. Due to the low reactivities of the substrates and congested chemical environments, the efficient establishment of polycyclic rings and enantioselective construction of quaternary carbon stereocenters are still ongoing challenges. In our laboratory, we are devoted to developing new methodologies and strategies for the total syntheses of bioactive polycyclic natural products and the exploration of their biological potentials. The photoenolization/Diels-Alder (PEDA) reaction has been recognized as a powerful strategy to increase synthetic efficiency and address the aforementioned issues. Over the past several years, our group systematically reinvestigated this reaction in terms of its reactivity and stereoselectivity and developed a unique dinuclear metal-promoted reaction process for constructing fused or spiro polycyclic rings bearing quaternary carbon stereocenters. During the course of this investigation, we have come to realize how to rationally design the synthetic route based on the PEDA reaction and successfully implement the synthetic projects.In this Account, we summarize our endeavors and journeys in the development and application of the PEDA reaction to the total synthesis of topologically complex natural products in order to draw attention to its broad utility and encourage further uptake. In the first part, we provide the details on the investigation of the PEDA reaction to address the issues of reactivity, diastereoselectivity, and enantioselectivity. An enantioselective PEDA reaction involving Ti(Oi-Pr)4 and TADDOL-type ligands was developed. This reaction enables the sterically bulky dienophiles to interact with the transient photoenolized hydroxy-o-quinodimethanes, delivering a wide range of polycyclic rings with single or vicinal quaternary carbon stereocenters in good yields with excellent enantioselectivities. In the second part, we showcase the synthetic potential of PEDA reaction in total synthesis of natural products. The fused tricyclic ring systems, bearing gem-dimethyl groups or quaternary carbon stereocenters located at the ring junction, were efficiently constructed by Ti(Oi-Pr)4-promoted PEDA reactions, which enabled the syntheses of three different types of natural products, including aromatic polyketides (anthrabenzoxocinones, fasamycins/naphthacemycins, and benastatins), meroterpenoid (oncocalyxone B), and halenaquinones (xestoquinone, adociaquinones A and B). To access structurally more complex triterpenoids, namely, perovskones and hydrangenones, the asymmetric PEDA reaction was developed to build a tricyclic ring along with three contiguous quaternary carbon stereocenters. The asymmetric PEDA reaction was also applied to achieve the total synthesis of aryltetralin lactone lignans. Furthermore, an intramolecular PEDA reaction provides a new pathway for the rapid construction of highly congested hydrophenanthrene with a quaternary carbon stereocenter, facilitating the total synthesis of five hasubanan alkaloids. We anticipate that the development of the PEDA reaction will inspire future innovations and progressions in asymmetric photo reactions, and its synthetic potential will be expanded by further applications in the total synthesis of complex natural and drug molecules.
Collapse
Affiliation(s)
- Baochao Yang
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, P. R. China
| | - Min Hou
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, Wuhu Hospital Affiliated to East China Normal University, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, P. R. China
| | - Shuanhu Gao
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663N Zhongshan Road, Shanghai 200062, P. R. China
| |
Collapse
|
2
|
Chen L, Zhang CH, Liu J, Sun J, Li CC. Asymmetric Synthesis of the Tetracyclic Core of Venezuelaene B. Org Lett 2025; 27:3517-3520. [PMID: 40168588 DOI: 10.1021/acs.orglett.5c00301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2025]
Abstract
A concise and efficient approach for the asymmetric synthesis of the tetracyclic core of venezuelaene B is described. Its uncommon and synthetically challenging [5-5-6-7] tetracyclic skeleton was constructed via a mild acid-promoted type I [5+2] cycloaddition, followed by a diastereoselective intramolecular Pauson-Khand reaction. The described chemistry establishes the feasibility of constructing the [5-5-6-7] tetracyclic core and several desired stereocenters (C2, C10, C11, and C14) of the final product.
Collapse
Affiliation(s)
- Louxi Chen
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Chao-Han Zhang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Junyang Liu
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen 529020, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| |
Collapse
|
3
|
Wang HB, Ge TJ, An XT, Liu XY, Meng LL, Yang YH, Zhou JY, Zhao XH, Fan CA. Asymmetric Total Synthesis of Eremophilanolide Sesquiterpene Xylareremophil and Its Congeners. Org Lett 2025; 27:2081-2086. [PMID: 39992745 DOI: 10.1021/acs.orglett.5c00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2025]
Abstract
The first asymmetric, protecting group free total synthesis of eremophilanolide sesquiterpenes, xylareremophil (1), 2α,3α-epoxymairetolide A (2), and 2,3-seco-2,3-olide-1-deoxygenmairetolide F (3), is concisely achieved with a longest linear route of five to eight steps, starting from the known (5S)-5,6-dimethyl-2-cyclohexenone as the chiral starting material. This synthetic approach mainly features an oxa-Pauson-Khand reaction of the highly functionalized chiral aldehyde precursor, forging a γ-butenolide-fused tricyclic core framework of eremophilanolides in a one-step manner. This study provides a novel strategic perspective for the divergent synthesis of the eremophilanolide sesquiterpenes.
Collapse
Affiliation(s)
- Hui-Bin Wang
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Tian-Jie Ge
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xian-Tao An
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xin-Yu Liu
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Le-Le Meng
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yu-Han Yang
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Jun-Yi Zhou
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Xian-He Zhao
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Chun-An Fan
- State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
4
|
Ylagan RMP, Zhu Y, Evans PA. Stereoselective transition metal-catalyzed [(2+2)+1] and [(2+2)+2] carbocyclization reactions using 1,6-enynes with 1,1-disubstituted olefins: construction of quaternary centers. Chem Sci 2025; 16:1490-1505. [PMID: 39713758 PMCID: PMC11656196 DOI: 10.1039/d4sc02645d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 09/06/2024] [Indexed: 12/24/2024] Open
Abstract
Transition metal-catalyzed carbocyclization reactions provide a powerful method for the stereoselective assembly of complex, highly substituted (poly)cyclic scaffolds. Although 1,6-enynes are common substrates for these transformations, using polysubstituted alkene derivatives to construct functionalized cyclic products remains challenging due to their significantly lower reactivity. This Perspective highlights key developments in stereoselective semi-intramolecular metal-catalyzed [(2+2)+1] and [(2+2)+2] carbocyclizations of 1,6-enynes containing 1,1-disubstituted alkenes, which produce cycloadducts with quaternary stereogenic centers. The insights gleaned from these examples provide a blueprint for developing more general carbocyclization strategies with challenging polysubstituted olefins.
Collapse
Affiliation(s)
- Ridge Michael P Ylagan
- Department of Chemistry, Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
| | - Yu Zhu
- Department of Chemistry, Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
| | - P Andrew Evans
- Department of Chemistry, Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
- Xiangya School of Pharmaceutical Sciences, Central South University Changsha 410013 Hunan China
| |
Collapse
|
5
|
Chen P, Chen L, Lin H, Jia Y. Total Synthesis of (+)-Mannolide B. J Am Chem Soc 2025; 147:636-643. [PMID: 39688933 DOI: 10.1021/jacs.4c12767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2024]
Abstract
(+)-Mannolide B possesses an intriguing and complex 5/7/5/6/6/6-fused hexacyclic scaffold including two bridged-lactone moieties and nine contiguous stereocenters, and thus represents a formidable challenge for total synthesis. Herein, the evolution of a successful strategy for the synthesis of mannolide B is described. The 7/5 ring system of the 7/5/6/6 tetracyclic carbon skeleton was efficiently constructed by a ring-closing metathesis starting from commercially available (-)-methyl jasmonate. Attempts to access the 6/6 ring system were unexpectedly challenging. Initially, an intramolecular Diels-Alder reaction was designed; however, the desired cyclization precursor could not be obtained. Furthermore, a radical cascade cyclization was investigated and produced only one six-membered ring with poor stereoselectivity at C5. Finally, the 6/6 ring system was successfully generated through a Pauson-Khand reaction, followed by a highly regioselective Büchner-Curtius-Schlotterbeck reaction, enabling us to achieve the first total synthesis of (+)-mannolide B in 24 steps.
Collapse
Affiliation(s)
- Peng Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
- Southwest United Graduate School, Kunming 650092, China
| | - Lijun Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
- Southwest United Graduate School, Kunming 650092, China
| | - Hongpeng Lin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
- Southwest United Graduate School, Kunming 650092, China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
- Southwest United Graduate School, Kunming 650092, China
| |
Collapse
|
6
|
Haghighi F, Jesikiewicz LT, Stahl CE, Nafie J, Ortega-Vega A, Liu P, Brummond KM. Stereo-Differentiating Asymmetric Rh(I)-Catalyzed Pauson-Khand Reaction: A DFT-Informed Approach to Thapsigargin Stereoisomers. J Am Chem Soc 2025; 147:498-509. [PMID: 39702925 PMCID: PMC11726561 DOI: 10.1021/jacs.4c11661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2024] [Revised: 12/06/2024] [Accepted: 12/09/2024] [Indexed: 12/21/2024]
Abstract
We report a stereo-differentiating dynamic kinetic asymmetric Rh(I)-catalyzed Pauson-Khand reaction, which provides access to an array of thapsigargin stereoisomers. Using catalyst-control, a consistent stereochemical outcome is achieved at C2─for both matched and mismatched cases─regardless of the allene-yne C8 stereochemistry. The stereochemical configuration for all stereoisomers was assigned by comparing experimental vibrational circular dichroism (VCD) and 13C NMR to DFT-computed spectra. DFT calculations of the transition-state structures corroborate experimentally observed stereoselectivity and identify key stabilizing and destabilizing interactions between the chiral ligand and allene-yne PKR substrates. The robust nature of our catalyst-ligand system places the total synthesis of thapsigargin and its stereoisomeric analogues within reach.
Collapse
Affiliation(s)
- Fatemeh Haghighi
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Luke T. Jesikiewicz
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Corrinne E. Stahl
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jordan Nafie
- BioTools,
Inc., Jupiter, Florida 33478, United States
| | - Amanda Ortega-Vega
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Peng Liu
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kay M. Brummond
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
7
|
Li T, Jiang S, Dai Y, Wu X, Guo H, Shi L, Sang X, Ren L, Wang J, Shi L, Zhou W, Li H, Hao HD. Total synthesis and target identification of marine cyclopiane diterpenes. Nat Commun 2024; 15:10851. [PMID: 39738095 PMCID: PMC11686375 DOI: 10.1038/s41467-024-55189-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 12/04/2024] [Indexed: 01/01/2025] Open
Abstract
Marine cyclopianes are a family of diterpenoid with novel carbon skeleton and diverse biological activities. Herein, we report our synthetic and chemical proteomics studies of cyclopiane diterpenes which culminate in the asymmetric total synthesis of conidiogenones C, K and 12β-hydroxy conidiogenone C, and identification of Immunity-related GTPase family M protein 1 (IRGM1) as a cellular target. Our asymmetric synthesis commences from Wieland-Miescher ketone and features a sequential intramolecular Pauson-Khand reaction and gold-catalyzed Nazarov cyclization to rapidly construct the 6-5-5-5 tetracyclic skeleton. The stereocontrolled cyclopentenone construction is further investigated on complex settings to demonstrate its synthetic utility. Furthermore, using an alkyne-tagged conidiogenone C-derived probe, IRGM1, a master regulator of type I interferon responses, is identified as a key cellular target of conidiogenone C responsible for its anti-inflammatory activity. Preliminary mechanism of action studies shows that conidiogenone C activates IRGM1-mediate dysfunctional mitochondria autophagy to maintain mitochondria quality control of inflammatory macrophages.
Collapse
Affiliation(s)
- Tian Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shan Jiang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yuanhao Dai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xia Wu
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Huihui Guo
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Liang Shi
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xueli Sang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Li Ren
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jie Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Lili Shi
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Wenming Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China.
| | - Hong-Dong Hao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100, China.
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
| |
Collapse
|
8
|
Qiao X, Xu J, He H, Gao S. Enantioselective Excited-State Nazarov Reaction: A Relay Strategy of Electrocyclization and Parallel Kinetic Resolution. Org Lett 2024; 26:11005-11010. [PMID: 39643589 DOI: 10.1021/acs.orglett.4c04177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2024]
Abstract
We report herein the enantioselective photoinduced Nazarov reaction using a relay strategy of an electrocyclization, followed by parallel kinetic resolution (PKR). No enantioselectivity was observed during electrocyclization due to weak coordination between chiral ligands and the substrate's carbonyl group. However, PKR was successfully achieved in the deprotonation step with a bifunctional chiral thiourea ligand. Regioselective deprotonation, controlled by the chiral N,N-dimethyl amine motif, produced cis-6,5,6-fused tricyclic stereoisomers with high ee and yields.
Collapse
Affiliation(s)
- Xuelong Qiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200050, China
| | - Jiwei Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200050, China
| | - Haibing He
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200050, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200050, China
- Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, Wuhu Hospital Affiliated to East China Normal University, East China Normal University, Shanghai 200050, China
| |
Collapse
|
9
|
Taguchi J, Fukaya S, Fujino H, Inoue M. Total Synthesis of Euphorbialoid A. J Am Chem Soc 2024; 146:34221-34230. [PMID: 39620709 DOI: 10.1021/jacs.4c14520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2024]
Abstract
Euphorbialoid A (1) belongs to the rare diterpenoid family of premyrsinanes and exhibits potent anti-inflammatory effects. The 5/7/6/3-membered carbocycle (ABCD-ring) of 1 contains 11 contiguous stereocenters and seven oxygen-containing functional groups. Moreover, four of the six hydroxy groups of 1 are concentrated in the southern sector and flanked by four structurally different acyl groups. The dense array of various functional groups with disparate reactivities on the tetracyclic ABCD-ring presents a daunting challenge for the chemical synthesis of 1. As a reflection of its formidable complexity, synthesis of 1 or any other premyrsinane diterpenoids has not yet been reported. Here, we devised a novel strategy comprising two stages and achieved the first total synthesis of 1 (35 steps as the longest linear sequence). In the first stage, the ABCD-ring was expeditiously assembled by integrating three powerful transformations: (1) Pt-doped TiO2-catalyzed radical coupling to attach a northern chain to a 6/3-membered CD-ring, (2) Pd-catalyzed decarboxylative asymmetric allylation to construct a quaternary carbon with a southern chain, and (3) a Co-mediated Pauson-Khand reaction to cyclize the two chains into the 5/7-membered AB-ring. In the second stage, three-dimensional structures of the ABCD-ring intermediates were utilized to stereoselectively fabricate the A-ring and site-selectively append the four different acyl groups. In the present total synthesis, we revealed the significance of orchestrating the multistep reaction sequence and incorporating cyclic protective groups. The overall strategy and tactics provide new insights into designing synthetic routes to premyrsinanes and densely oxygenated terpenoids decorated with diverse acyl groups.
Collapse
Affiliation(s)
- Junichi Taguchi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shintaro Fukaya
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Haruka Fujino
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
10
|
Qi Y, Jesikiewicz LT, Scofield GE, Liu P, Brummond KM. Systematic Parameter Determination Aimed at a Catalyst-Controlled Asymmetric Rh(I)-Catalyzed Pauson-Khand Reaction. ACS Catal 2024; 14:17065-17076. [PMID: 39569153 PMCID: PMC11574763 DOI: 10.1021/acscatal.4c04490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2024] [Revised: 10/23/2024] [Accepted: 10/24/2024] [Indexed: 11/22/2024]
Abstract
Transition metal-catalyzed carbocyclization reactions have revolutionized the synthesis of complex cyclic organic compounds. Yet, subtle substrate changes can significantly alter reaction pathways. The asymmetric Rh(I)-catalyzed Pauson-Khand reaction (PKR) exemplifies such a reaction, hindered by a narrow substrate scope and competing reactivity modes. In this study, we identified parameters predictive of the yield and enantioselectivity in the catalyst-controlled asymmetric PKR, using 1,6-enynes with a 2,2-disubstituted alkene. In this way, ring-fused cyclopentenones can be formed with chiral quaternary carbon centers. Using bisphosphine ligand parameters from palladium complexes, including the energy of the Pd lone pair orbital and the angle formed by the phosphorus aryl groups on the ligand, we established strong correlations with experimental ln(er) (R 2 = 0.99 and 0.91) for two distinct precursors. Solvent dipole moments correlated with ln(er) for high-dipole-moment precursors (R 2 = 0.94), while Abraham's hydrogen bond basicity is more relevant for low-dipole-moment precursors (R 2 = 0.93). Additionally, counterions were found to have a significant impact on the PKR reactivity and selectivity, as does the steric demand of the alkyne substituent of the enyne precursor. In the latter case, ln(er) correlates with Sterimol B1 values for products from different alkyne substituents (R 2 = 0.99). Furthermore, the computed C≡C wavenumber of the enyne precursor can be directly aligned with the yield of asymmetric PKRs.
Collapse
Affiliation(s)
- Yifan Qi
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Luke T. Jesikiewicz
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Grace E. Scofield
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kay M. Brummond
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
11
|
Wang YX, Li CL, Liu YP, Hao WJ, Yu ZX, Jiang B. Pd(II)/ N, N'-Disulfonyl Bisimidazoline-Catalyzed Enantioselective Synthesis of Cyclic Quaternary Centers and Mechanistic Investigations. J Org Chem 2024; 89:9381-9388. [PMID: 38885147 DOI: 10.1021/acs.joc.4c00636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
A Pd(II)/N,N'-disulfonyl bisimidazoline-catalyzed asymmetric 1,4-conjugate addition reaction of low-cost arylboronic acids with readily available β-substituted cyclic enones is described, providing a straightforward way of constructing cyclic all-carbon quaternary stereocenters with high enantioselectivity, in which ≥96% ee was obtained in most cases. The reaction proceeded without the protection of inert gas, making the operation process simple. Theoretical calculations have been applied to understand the origins of enantioselectivity.
Collapse
Affiliation(s)
- Yu-Xin Wang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Chen-Long Li
- College of Chemistry, Peking University, Beijing 100871, China
| | - Yin-Ping Liu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Zhi-Xiang Yu
- College of Chemistry, Peking University, Beijing 100871, China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| |
Collapse
|
12
|
Zhu J, Yan J, Wang F, Zhang L, Li J, Cheng M, Yang L, Liu Y. Gold-Catalyzed Oxidative Rearrangement Strategy to Yield 2-Hydroxycyclohepta-1,3-diene-1-carbonyl Compounds. J Org Chem 2024; 89:8734-8744. [PMID: 38814709 DOI: 10.1021/acs.joc.4c00648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
A gold-catalyzed oxidative rearrangement of propargyl alcohols, derived from commercially available cyclohex-2-en-1-ones and alkynes, was successfully developed for the efficient synthesis of seven-membered rings. Thorough investigations were conducted to optimize the reaction conditions and evaluate its compatibility with various functional groups. Additionally, this methodology was applied to the formal total synthesis of guanacastepene A, demonstrating its practical utility in complex natural product synthesis. This versatile and efficient approach opens up new possibilities for the construction of diverse seven-membered ring systems, providing valuable building blocks for further exploration in drug discovery and the synthesis of intricate molecules.
Collapse
Affiliation(s)
- Jiang Zhu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Jianghao Yan
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Fudong Wang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lianjie Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Jiaji Li
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| |
Collapse
|
13
|
Parte LG, Fernández S, Sandonís E, Guerra J, López E. Transition-Metal-Catalyzed Transformations for the Synthesis of Marine Drugs. Mar Drugs 2024; 22:253. [PMID: 38921564 PMCID: PMC11204618 DOI: 10.3390/md22060253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/27/2024] Open
Abstract
Transition metal catalysis has contributed to the discovery of novel methodologies and the preparation of natural products, as well as new chances to increase the chemical space in drug discovery programs. In the case of marine drugs, this strategy has been used to achieve selective, sustainable and efficient transformations, which cannot be obtained otherwise. In this perspective, we aim to showcase how a variety of transition metals have provided fruitful couplings in a wide variety of marine drug-like scaffolds over the past few years, by accelerating the production of these valuable molecules.
Collapse
Affiliation(s)
- Lucía G. Parte
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Sergio Fernández
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London (QMUL), Mile End Road, London E1 4NS, UK;
| | - Eva Sandonís
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Javier Guerra
- Department of Organic Chemistry, Science Faculty, University of Valladolid (UVa), Paseo de Belén 7, 47011 Valladolid, Spain; (L.G.P.); (E.S.)
| | - Enol López
- Department of Organic Chemistry, ITAP, School of Engineering (EII), University of Valladolid (UVa), Dr Mergelina, 47002 Valladolid, Spain
| |
Collapse
|
14
|
Degroote F, Denoo B, Ryckaert B, Callebaut B, Van Hecke K, Hullaert J, Winne JM. Dithioallyl cation (3 + 2) cycloadditions under aprotic reaction conditions: rapid access to spiro-fused cyclopentane scaffolds. Org Biomol Chem 2023; 21:8117-8124. [PMID: 37786324 DOI: 10.1039/d3ob01273e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
We report a general method to effect all-carbon (3 + 2) cycloadditions that can elaborate cyclopentenes from a range of olefins. The required dithioallyl cation reagents can be generated in a newly developed mild protocol starting from 2-allyloxypyridine precursors, thus avoiding the use of strong Brønsted acids. The novel method significantly expands the substrate scope, which now also includes acid-sensitive olefins, and thus enables the preparation of previously inaccessible spiro-fused scaffold types from simple and readily available starting materials.
Collapse
Affiliation(s)
- Frederick Degroote
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| | - Bram Denoo
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| | - Bram Ryckaert
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| | - Brenda Callebaut
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Jan Hullaert
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| | - Johan M Winne
- OSgroup, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000 Ghent, Belgium.
| |
Collapse
|
15
|
Abstract
ConspectusSteroids continue to play a significant role in organic chemistry, medicinal chemistry, and drug discovery due to their important biological activities and diverse intriguing structures. Although synthetic organic chemists have successfully constructed and elaborated the classical [6-6-6-5] tetracyclic steroid skeleton for nearly a century, synthesis of the unusual rearranged steroids, particularly abeo-steroids with a medium-sized ring, remains a challenge in the synthetic community. Furthermore, the structures of abeo-steroids are complex and diverse, containing a seven-membered ring embedded in the fused or bridged A/B ring system and possessing numerous stereogenic centers. Besides their structural complexity, various abeo-steroids have shown remarkable biological activities. However, the relative scarcity of abeo-steroids in natural sources has impeded the systematic evaluation of their biological activities. In addition, direct strategies to build the core structures of abeo-steroids are very rare, partially because of the high ring-strain energies of their rearranged A/B ring systems. Therefore, the development of direct and efficient synthetic approaches to these complex molecules is highly desired.Our long-standing interest in the total synthesis of abeo-steroids and the development of new cycloaddition reactions for streamlining complex molecule synthesis have led us to develop a series of unique and powerful intramolecular cycloaddition strategies to access a diverse array of highly strained abeo-steroids. These strategies include Ru-catalyzed [5 + 2] cycloaddition, acid-promoted type I [5 + 2] cycloaddition, Rh-catalyzed [2 + 2 + 1] cycloaddition, and type II [5 + 2] cycloaddition. Since 2018, we have accomplished the first total syntheses of five synthetically challenging abeo-steroids, i.e., bufogargarizins A and B, phomarol, bufospirostenin A, and cyclocitrinol, thus facilitating the evaluation of their pharmacological potentials. In this Account, we summarize our laboratory's systematic efforts in the total synthesis of these abeo-steroids via cycloaddition strategies. We highlight the efficiency and versatility of each cycloaddition strategy for constructing structurally complex abeo-steroid cores by forming the A/B ring system. The evolution of each strategy and key lessons learned from the synthetic journey are also discussed. We believe that our unique perspective in this field will promote advances in the total synthesis of abeo- and related steroids.
Collapse
Affiliation(s)
- Long Min
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Li-Ping Zhong
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| |
Collapse
|
16
|
Wang H, Liu Y, Zhang H, Yang B, He H, Gao S. Asymmetric Total Synthesis of Cephalotaxus Diterpenoids: Cephinoid P, Cephafortoid A, 14- epi-Cephafortoid A and Fortalpinoids M-N, P. J Am Chem Soc 2023; 145:16988-16994. [PMID: 37493585 DOI: 10.1021/jacs.3c05455] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
The asymmetric total syntheses of cephalotaxus C19 diterpenoids, bearing a unique cycloheptene A ring with a chiral methyl group at C-12, were disclosed based on a universal strategy. Six members, including cephinoid P, cephafortoid A, 14-epi-cephafortoid A and fortalpinoids M-N, P, were accomplished for the first time. The concise approach relies on two crucial steps: (1) a Nicholas/Hosomi-Sakurai cascade reaction was developed to efficiently generate the cycloheptene ring bearing a chiral methyl group; (2) an intramolecular Pauson-Khand reaction was followed to facilitate the construction of the complete skeleton of target molecules. Our studies provide a new strategy for the synthetic analysis of cephalotaxus diterpenoids and structurally related polycyclic natural products.
Collapse
Affiliation(s)
- Hui Wang
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Yi Liu
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Hongyuan Zhang
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Baochao Yang
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Haibing He
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Shuanhu Gao
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, Wuhu Hospital Affiliated to East China Normal University, East China Normal University, Shanghai 200062, P. R. China
| |
Collapse
|
17
|
Yang Y, Li HX, Zhu TY, Zhang ZY, Yu ZX. Rh-Catalyzed [4 + 1] Reaction of Cyclopropyl-Capped Dienes (but not Common Dienes) and Carbon Monoxide: Reaction Development and Mechanistic Study. J Am Chem Soc 2023; 145:17087-17095. [PMID: 37523458 DOI: 10.1021/jacs.3c03047] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Transition-metal-catalyzed [4 + 1] reaction of dienes and carbon monoxide (CO) is the most straightforward and easily envisioned cyclization for the synthesis of five-membered carbocycles, which are ubiquitously found in natural products and functional molecules. Unfortunately, no test of this reaction was reported, and consequently, chemists do not know whether such kind of reaction works or not. Herein, we report that the [4 + 1] reaction of common dienes and CO cannot work, at least under the catalysis of [Rh(cod)Cl]2. However, using cyclopropyl-capped dienes (also named allylidenecyclopropanes) as substrates, the corresponding [4 + 1] reaction with CO proceeds smoothly in the presence of [Rh(cod)Cl]2. This [4 + 1] reaction, with a broad scope, provides efficient access to five-membered carbocyclic compounds of spiro[2.4]hept-6-en-4-ones. The [4 + 1] cycloadducts can be further transformed into other molecules by using the unique chemistry of cyclopropyl groups present in these molecules. The mechanism of this [4 + 1] reaction has been investigated by quantum chemical calculations, uncovering that cyclopropyl-capped dienes are strained dienes and the oxidative cyclization step in the [4 + 1] catalytic cycle can release this (angular) strain both kinetically and thermodynamically. The strain release in this step then propagates to all followed CO coordination/CO insertion/reductive elimination steps in the [4 + 1] catalytic cycle, helping the realization of this cycloaddition reaction. In contrast, common dienes (including cyclobutyl-capped dienes) do not have such advantages and their [4 + 1] reaction suffers from energy penalty in all steps involved in the [4 + 1] catalytic cycle. The reactivity of ene-allenes for the [4 + 1] reaction with CO is also discussed.
Collapse
Affiliation(s)
- Yusheng Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Han-Xiao Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Tian-Yu Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zi-You Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| |
Collapse
|
18
|
Chen XW, Hou ZC, Chen C, Zhang LH, Chen ME, Zhang FM. Enantioselective total syntheses of six natural and two proposed meroterpenoids from Psoralea corylifolia. Chem Sci 2023; 14:5699-5704. [PMID: 37265714 PMCID: PMC10231314 DOI: 10.1039/d3sc00582h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/01/2023] [Indexed: 06/03/2023] Open
Abstract
The first enantioselective total syntheses of six natural and two proposed meroterpenoids isolated from Psoralea corylifolia have been achieved in 7-9 steps from 2-methylcyclohexanone. The current synthetic approaches feature a high level of synthetic flexibility, stereodivergent fashion and short synthetic route, thereby providing a potential platform for the preparation of numerous this-type meroterpenoids and their pseudo-natural products.
Collapse
Affiliation(s)
- Xiao-Wei Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Zi-Chao Hou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Chi Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Ling-Hui Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Meng-En Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| |
Collapse
|
19
|
Zou YP, Lai ZL, Zhang MW, Peng J, Ning S, Li CC. Total Synthesis of (±)- and (-)-Daphnillonin B. J Am Chem Soc 2023; 145:10998-11004. [PMID: 37167083 DOI: 10.1021/jacs.3c03755] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The first total synthesis of (±)- and (-)-daphnillonin B, a daphnicyclidin-type alkaloid with a new [7-6-5-7-5-5] A/B/C/D/E/F hexacyclic core, has been achieved. The [6-5-7] B/C/D ring system was efficiently and diastereoselectively constructed via a mild type I intramolecular [5+2] cycloaddition, followed by a Grubbs II catalyst-catalyzed radical cyclization. The [5-5] fused E/F ring system was synthesized via a diastereoselective intramolecular Pauson-Khand reaction. Notably, the synthetically challenging [7-6-5-7-5-5] hexacyclic core was reassembled by a unique Wagner-Meerwein-type rearrangement from the [6-6-5-7-5-5] hexacyclic framework found in calyciphylline A-type Daphniphyllum alkaloids.
Collapse
Affiliation(s)
- Yun-Peng Zou
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zheng-Lin Lai
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Meng-Wei Zhang
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianzhao Peng
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shuai Ning
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| |
Collapse
|
20
|
Huang HG, Zheng YQ, Zhong D, Deng JL, Liu WB. Reductive Aza-Pauson-Khand Reaction of Nitriles. J Am Chem Soc 2023; 145:10463-10469. [PMID: 37129915 DOI: 10.1021/jacs.3c01656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
γ-Lactams are valuable heterocycles in synthetic chemistry and drug development. Here, we report a reductive aza-Pauson-Khand reaction (aza-PKR) of an alkyne, a nitrile, and Co2(CO)8. A wide array of bicyclic α,β-unsaturated γ-lactams containing two adjacent stereocenters, including an all-carbon quaternary center, from alkyne-tethered malononitriles are efficiently accessed in high diastereoselectivity. Preliminary mechanistic investigations by experiments and DFT calculations reveal that the reaction undergoes an aza-PKR process followed by a in situ reduction. The reducing reagent generated in situ from water also provides a practical tool for deuterium incorporation into the γ-position of lactams using D2O as the deuterium source. This study represents a new mode for [2 + 2 + 1] cycloaddition that enables the direct use of nitrile in aza-heterocycle synthesis.
Collapse
Affiliation(s)
- Hong-Gui Huang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yu-Qing Zheng
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Dayou Zhong
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Jiang-Lian Deng
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Wen-Bo Liu
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
21
|
Zhu HT, Liang CM, Li TY, Li LY, Zhang RL, Wang JN, Qi RQ, Zhang JM, Yang RH, Yang YQ, Zhou AX, Jin X, Zhou NN. Dual Proton/Silver-Catalyzed Serial (5 + 2)-Cycloaddition and Nazarov Cyclization of ( E)-2-Arylidene-3-hydroxyindanones with Conjugated Eneynes: Synthesis of Indanone-Fused Benzo[ cd]azulenes. J Org Chem 2023; 88:3409-3423. [PMID: 36847758 DOI: 10.1021/acs.joc.2c02247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A one-pot step-economic tandem process involving (5 + 2)-cycloaddition and Nazarov cyclization reactions has been reported for the facile synthesis of indanone-fused benzo[cd]azulenes from (E)-2-arylidene-3-hydroxyindanones and conjugated eneynes. This highly regio- and stereoselective bisannulation reaction is enabled by dual silver and Brønsted acid catalysis and opens up a new avenue for the construction of important bicyclo[5.3.0]decane skeletons.
Collapse
Affiliation(s)
- Hai-Tao Zhu
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Chun-Miao Liang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ting-Yan Li
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Lin-Yan Li
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Rui-Ling Zhang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Jun-Na Wang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Rui-Qing Qi
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Jia-Min Zhang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ruo-Han Yang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Yin-Qi Yang
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| | - An-Xi Zhou
- Key Laboratory of Applied Organic Chemistry, Higher Institutions of Jiangxi Province, Shangrao Normal University, Shangrao 334000, China
| | - Xiaojie Jin
- Gansu University Key Laboratory for Molecular Medicine & Chinese Medicine Prevention and Treatment of Major Diseases, Gansu University of Chinese Medicine, Lanzhou 730000, China
| | - Ni-Ni Zhou
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, China
| |
Collapse
|
22
|
Song Y, Wu C, Zhang J, Zhang W, Qin X, Yang Y, Kang G, Jiang J, Liu H. Switchable multipath cascade cyclization to synthesize bicyclic lactams and succinimides via chemodivergent reaction. Chem Commun (Camb) 2023; 59:3313-3316. [PMID: 36852458 DOI: 10.1039/d2cc06841a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Herein, a novel switchable multipath cascade cyclization via chemodivergent reaction between readily available ketoamides and deconjugated butenolides was developed to efficiently synthesize γ-lactone fused γ-lactams and succinimide fused hemiketals. The Aldol/aza-Michael reaction and Aldol/imidation/hemiketalization reaction were enabled by catalytic amounts of two bases, namely tetramethyl guanidine and NaOAc. A wide range of substrate scope with diverse functional group compatibility was demonstrated to deliver the corresponding products with good yield and excellent diastereoselectivity (>60 examples).
Collapse
Affiliation(s)
- Yimei Song
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Chaofei Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Jinhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Wenhai Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Xin Qin
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Yixiao Yang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Guowei Kang
- Department of Chemistry, The Scripps Research Institute, North Torrey Pines Road, La Jolla 10550, USA.
| | - Jun Jiang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Hongxin Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China. .,Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China.
| |
Collapse
|
23
|
Yu T, Yang J, Wang Z, Ding Z, Xu M, Wen J, Xu L, Li P. Selective [2σ + 2σ] Cycloaddition Enabled by Boronyl Radical Catalysis: Synthesis of Highly Substituted Bicyclo[3.1.1]heptanes. J Am Chem Soc 2023; 145:4304-4310. [PMID: 36763965 DOI: 10.1021/jacs.2c13740] [Citation(s) in RCA: 86] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
In contrast to the traditional and widely-used cycloaddition reactions involving at least a π bond component, a [2σ + 2σ] radical cycloaddition between bicyclo[1.1.0]butanes (BCBs) and cyclopropyl ketones has been developed to provide a modular, concise, and atom-economical synthetic route to substituted bicyclo[3.1.1]heptane (BCH) derivatives that are 3D bioisosteres of benzenes and core skeleton of a number of terpene natural products. The reaction was catalyzed by a combination of simple tetraalkoxydiboron(4) compound B2pin2 and 3-pentyl isonicotinate. The broad substrate scope has been demonstrated by synthesizing a series of new highly functionalized BCHs with up to six substituents on the core with up to 99% isolated yield. Computational mechanistic investigations supported a pyridine-assisted boronyl radical catalytic cycle.
Collapse
Affiliation(s)
- Tao Yu
- Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710054, China
| | - Jinbo Yang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Zhengwei Ding
- Department of Medicinal Chemistry, School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Ming Xu
- Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710054, China
| | - Jingru Wen
- Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710054, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Pengfei Li
- Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710054, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| |
Collapse
|
24
|
Chen Y, Gao S. Total Synthesis of (–)-Principinol C. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
|
25
|
Kanwal A, Bilal M, Rasool N, Zubair M, Shah SAA, Zakaria ZA. Total Synthesis of Terpenes and Their Biological Significance: A Critical Review. Pharmaceuticals (Basel) 2022; 15:1392. [PMID: 36422521 PMCID: PMC9699253 DOI: 10.3390/ph15111392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/13/2022] [Accepted: 10/24/2022] [Indexed: 09/10/2024] Open
Abstract
Terpenes are a group of natural products made up of molecules with the formula (C5H8)n that are typically found in plants. They are widely employed in the medicinal, flavor, and fragrance industries. The total synthesis of terpenes as well as their origin and biological potential are discussed in this review.
Collapse
Affiliation(s)
- Aqsa Kanwal
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Bilal
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Nasir Rasool
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Zubair
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Syed Adnan Ali Shah
- Faculty of Pharmacy, Universiti Teknologi MARA Cawangan Selangor Kampus Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA Cawangan Selangor Kampus Puncak Alam, Bandar Puncak Alam 42300, Selangor, Malaysia
| | - Zainul Amiruddin Zakaria
- Borneo Research on Algesia, Inflammation and Neurodegeneration (BRAIN) Group, Faculty of Medicine and Health Sciences, Sabah Universiti Malaysia, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia
| |
Collapse
|
26
|
Ma T, Cheng H, Pitchakuntla M, Ma W, Jia Y. Total Synthesis of (−)-Principinol C. J Am Chem Soc 2022; 144:20196-20200. [DOI: 10.1021/jacs.2c08694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tianhao Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Hao Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Mallesham Pitchakuntla
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Weihao Ma
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, 38 Xueyuan Road, Beijing 100191, China
| |
Collapse
|
27
|
Kalb AE, Liu M, Bosso MI, Uyeda C. A dinickel-catalyzed three-component cycloaddition of vinylidenes. Chem Sci 2022; 13:11190-11196. [PMID: 36320482 PMCID: PMC9516891 DOI: 10.1039/d2sc02696a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 08/17/2022] [Indexed: 09/20/2023] Open
Abstract
A dinickel catalyst promotes the [2 + 2 + 1]-cycloaddition of two aldehyde equivalents and a vinylidene. The resulting methylenedioxolane products can be deprotected in one pot under acidic conditions to reveal α-hydroxy ketones. This method provides convenient access to unsymmetrical alkyl-substituted α-hydroxy ketones, which are challenging to synthesize selectively using cross-benzoin reactions. Mechanistic studies are consistent with an initial migratory insertion of the aldehyde into a dinickel bridging vinylidene. Insertion of the second aldehyde followed by C-O reductive elimination furnishes the cycloadduct. Under dilute conditions, an enone side product is generated due to a competing β-hydride elimination from the proposed metallacyclic intermediate. A DFT model consistent with the concentration-dependent formation of the methylenedioxolane and enone is presented.
Collapse
Affiliation(s)
- Annah E Kalb
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| | - Mingxin Liu
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| | - Megan I Bosso
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| | - Christopher Uyeda
- Department of Chemistry, Purdue University West Lafayette Indiana 47907 USA
| |
Collapse
|
28
|
Escorihuela J, Wolf LM. Computational Study on the Co-Mediated Intramolecular Pauson–Khand Reaction of Fluorinated and Chiral N-Tethered 1,7-Enynes. Organometallics 2022; 41:2525-2534. [PMID: 36185394 PMCID: PMC9516775 DOI: 10.1021/acs.organomet.2c00227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Indexed: 11/28/2022]
Abstract
![]()
The Co2(CO)8-mediated intramolecular
Pauson–Khand
reaction is an elegant approach to obtain cyclopentenone derivatives
containing asymmetric centers. In this work, we employed density functional
theory calculations at the M11/6-311+G(d,p) level of theory to investigate
the mechanism and reactivity for the Pauson–Khand reaction
of fluorinated and asymmetric N-tethered 1,7-enynes.
The rate-determining step was found to be the intramolecular alkene
insertion into the carbon–cobalt bond. The stereoselectivity
of the alkene insertion step was rationalized by the different transition
states showing the coordination of the alkene through the Re- and Si-face. The effects of different
fluorine groups and steric effects on both the alkenyl and alkynyl
moieties were also theoretically investigated.
Collapse
Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Orgánica, Facultad de Farmacia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100Burjassot, València, Spain
| | - Lawrence M. Wolf
- Department of Chemistry, University of Massachusetts−Lowell, 1 University Avenue, Lowell, Massachusetts01854, United States
| |
Collapse
|
29
|
Wang DK, Li LB, Liu FL, Qiu H, Li JZ, Zhang J, Deng C, Wei WT. Fe-Catalyzed Selective Formal Insertion of Diazo Compounds into C(sp)-C(sp 3) Bonds of Propargyl Alcohols: Access to Alkyne-Substituted All-Carbon Quaternary Centers. ACS CENTRAL SCIENCE 2022; 8:1028-1034. [PMID: 35912339 PMCID: PMC9336152 DOI: 10.1021/acscentsci.2c00204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Indexed: 06/15/2023]
Abstract
The construction of all-carbon quaternary centers, especially those containing an alkyne-substituted framework, represents an important challenge in organic synthesis. Here we present a novel Fe-catalyzed selective formal insertion of diazo compounds into C(sp)-C(sp3) bonds of propargyl alcohols under mild conditions that enables the streamlined construction of alkyne-substituted all-carbon quaternary centers. This unique strategy starts with in situ generation of an ester group in the presence of carboxylic acids, followed by insertion of metal-carbene into C(sp)-C(sp3) bonds, which may open up a new reaction mode for exploring metal-carbene insertion into acyclic C-C bonds.
Collapse
Affiliation(s)
- Dong-Kai Wang
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Liu-Bin Li
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Fa-Liang Liu
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Hui Qiu
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Jiao-Zhe Li
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Jianfeng Zhang
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| | - Chao Deng
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P. R. China
| | - Wen-Ting Wei
- School
of Materials Science and Chemical Engineering, Key Laboratory of Advanced
Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
| |
Collapse
|
30
|
Ryckaert B, Hullaert J, Van Hecke K, Winne JM. Dearomative (3 + 2) Cycloadditions of Unprotected Indoles. Org Lett 2022; 24:4119-4123. [PMID: 35674713 DOI: 10.1021/acs.orglett.2c01214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The (3 + 2) cycloaddition of various indoles with a dithioallyl cation affords dearomatized cyclopentannulated adducts, with complete control of regioselectivity and excellent chemo- and diastereoselectivity. The success of the reaction critically relies on the use of an excess of very strong Brønsted acid, which paradoxically prevents carbocationic side reactions. The reaction tolerates sensitive functionalities such as basic amines or free hydroxyls, and we demonstrate its use in late stage derivatization of highly functionalized, unprotected indoles.
Collapse
Affiliation(s)
- Bram Ryckaert
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Jan Hullaert
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Kristof Van Hecke
- Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Johan M Winne
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| |
Collapse
|
31
|
Wang YQ, Xu K, Min L, Li CC. Asymmetric Total Syntheses of Hypoestin A, Albolic Acid, and Ceroplastol II. J Am Chem Soc 2022; 144:10162-10167. [PMID: 35657330 DOI: 10.1021/jacs.2c04633] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first asymmetric total synthesis of bioactive diterpenoid hypoestin A with an unprecedented [5-8-5-3] tetracyclic skeleton is accomplished in 15 steps from commercially available (R)-limonene. Furthermore, the second asymmetric total syntheses of sesterterpenoids albolic acid and ceroplastol II in 21 steps are also reported. The synthetically challenging and highly functionalized [X-8-5] (X = 5 or 7) tricarbocyclic ring systems found in hypoestin A, albolic acid, ceroplastol II, and schindilactone A, as well as other natural products, are efficiently and directly constructed via a unique intramolecular Pauson-Khand reaction of an allene-yne. This work represents the first reported use of the Pauson-Khand reaction to access synthetically challenging eight-membered-ring systems in natural product synthesis.
Collapse
Affiliation(s)
- Yong-Qiang Wang
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Kunhua Xu
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Long Min
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| |
Collapse
|
32
|
Wang X, Liu F, Xu T. Catalytic diastereoselective construction of multiple contiguous quaternary carbon stereocenters via [2 + 2] cycloaddition and mechanistic insight. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
33
|
Shaw P, Hassell-Hart SJ, Douglas GE, Malcolm AG, Kennedy AR, White GV, Paterson LC, Kerr WJ. Oxygenated Cyclopentenones via the Pauson-Khand Reaction of Silyl Enol Ether Substrates. Org Lett 2022; 24:2750-2755. [PMID: 35377671 PMCID: PMC9016766 DOI: 10.1021/acs.orglett.2c00856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
![]()
We report here the
application of silyl enol ether moieties as
efficient alkene coupling partners within cobalt-mediated intramolecular
Pauson–Khand reactions. This cyclization strategy delivers
synthetically valuable oxygenated cyclopentenone products in yields
of ≤93% from both ketone- and aldehyde-derived silyl enol ethers,
incorporates both terminal and internal alkyne partners, and delivers
a variety of decorated systems, including more complex tricyclic structures.
Facile removal of the silyl protecting group reveals oxygenated sites
for potential further elaboration.
Collapse
Affiliation(s)
- Paul Shaw
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Storm J Hassell-Hart
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K.,Medicines Research Centre, GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, England, U.K
| | - Gayle E Douglas
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Andrew G Malcolm
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Alan R Kennedy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Gemma V White
- Medicines Research Centre, GlaxoSmithKline, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, England, U.K
| | - Laura C Paterson
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - William J Kerr
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| |
Collapse
|
34
|
Mondal B, Jagadeesh C, Das D, Saha J. An acid-promoted pseudocine substitution manifold of γ-aminocyclopentenone enables divergent access to polycyclic indole derivatives. Chem Commun (Camb) 2022; 58:2504-2507. [PMID: 35089294 DOI: 10.1039/d1cc06883k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We demonstrated γ-aminocyclopentenones to be a suitable surrogate for reactive cyclopentadienone via a pseudocine-substitution manifold. This approach enabled its orchestrated annulation with "tailored" bis-nucleophiles and to furnish complex β,γ-annulated cyclopentanoids or indole-based polycyclic architectures. This strategy represents a generalized means for direct, regioselective and stereoselective β,γ-functionalization of monosubstituted or unsubstituted aminocyclopentenones.
Collapse
Affiliation(s)
- Biplab Mondal
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus. Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Chenna Jagadeesh
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus. Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Dinabandhu Das
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
| | - Jaideep Saha
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus. Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| |
Collapse
|
35
|
Guo L, Xu Z, Tong R. Asymmetric Total Synthesis of Indole Diterpenes Paspalicine, Paspalinine, and Paspalinine‐13‐ene. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lian‐Dong Guo
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
| | - Zejun Xu
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
| | - Rongbiao Tong
- Department of Chemistry The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
- Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou) The Hong Kong University of Science and Technology Clearwater Bay Kowloon, Hong Kong China
- HKUST Shenzhen Research Institute Shenzhen 518057 China
| |
Collapse
|
36
|
Abstract
A concise and stereoselective total synthesis of (±)-cephanolide B was achieved in 15 steps. The key steps in the synthesis were as follows: (i) an intermolecular Diels-Alder reaction followed by lactonization to form the oxabicyclo[2.2.2]octane DE ring; (ii) a tandem reaction, featuring an intramolecular Pauson-Khand reaction, a 6π-electrocyclization, and an oxidative aromatization by O2, to construct the ABC-tricyclic rings (6-5-6); and (iii) a phthaloyl peroxide-mediated arene oxygenation to install the C-13 phenol group.
Collapse
Affiliation(s)
- Anding Li
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Ziru He
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Bingyan Liu
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China.,Shenzhen Bay Laboratory, Shenzhen 518055, China.,Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - Zichun Zhang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| |
Collapse
|
37
|
Heravi MM, Mohammadi L. Application of Pauson-Khand reaction in the total synthesis of terpenes. RSC Adv 2021; 11:38325-38373. [PMID: 35493249 PMCID: PMC9044263 DOI: 10.1039/d1ra05673e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 10/28/2021] [Indexed: 12/28/2022] Open
Abstract
The Pauson-Khand reaction (PKR) is a formal [2 + 2 + 1] cycloaddition involving an alkyne, an alkene and carbon monoxide mediated by a hexacarbonyldicobaltalkyne complex to yield cyclopentenones in a single step. This versatile reaction has become a method of choice for the synthesis of cyclopentenone and its derivatives since its discovery in the early seventies. The aim of this review is to point out the applications of PKR in the total synthesis of terpenes.
Collapse
Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Leila Mohammadi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| |
Collapse
|
38
|
Guo LD, Xu Z, Tong R. Asymmetric Total Synthesis of Indole Diterpenes Paspalicine, Paspalinine, and Paspalinine-13-ene. Angew Chem Int Ed Engl 2021; 61:e202115384. [PMID: 34784090 DOI: 10.1002/anie.202115384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Indexed: 11/08/2022]
Abstract
Paspaline-derived indole diterpenes (IDTs) are structurally complex mycotoxins with unique tremorgenic activity. Reported are asymmetric total syntheses of three paspaline-derived IDTs paspalicine, paspalinine and paspalinine-13-ene. Our synthesis features a green Achmatowicz rearrangement/bicycloketalization for the efficient construction of FG rings (75 % yield) and a cascade ring-closing metathesis of dienyne for highly regioselective formation of CD rings (72 % yield). Other highlights include four palladium-mediated reactions (Stille, aza-Wacker, Suzuki, and Heck) to forge the BE rings and the installation of two continuous all-carbon quaternary stereocenters via reductive ring-opening of cyclopropane and α-methylation of the conjugate ester. Our new synthetic strategy is expected to be applicable to the chemical synthesis of other paspaline-derived IDTs and will facilitate the bioactivity studies of these agriculturally and pharmacologically important IDTs.
Collapse
Affiliation(s)
- Lian-Dong Guo
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China
| | - Zejun Xu
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China.,Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou), The Hong Kong University of Science and Technology Clearwater Bay, Kowloon, Hong Kong, China.,HKUST Shenzhen Research Institute, Shenzhen, 518057, China
| |
Collapse
|
39
|
Zhou W, Voituriez A. Synthesis of Cyclopentenones with C4-Quaternary Stereocenters via Stereospecific [3,3]-Sigmatropic Rearrangement and Applications in Total Synthesis of Sesquiterpenoids. J Am Chem Soc 2021; 143:17348-17353. [PMID: 34661403 DOI: 10.1021/jacs.1c07966] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cationic gold(I)-catalyzed asymmetric [3,3]-sigmatropic rearrangement of sulfonium leads after cyclization to cyclopentenones with a C4-quaternary stereocenter. Starting with simple vinyl sulfoxides and propargyl silane, numerous compounds were isolated with moderate to good yields and excellent enantiomeric excesses (26 examples). The application of this simple methodology allowed the efficient total synthesis of five natural sesquiterpenoids, including enokipodin A and B, hitoyopodin A, lagopodin A, and isocuparene-3,4-diol.
Collapse
Affiliation(s)
- Weiping Zhou
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| |
Collapse
|
40
|
Wang X, Li D, Zhang J, Gong J, Fu J, Yang Z. A Synthetic Route to The Core Structure of (-)-Retigeranic Acid A. Org Lett 2021; 23:5092-5097. [PMID: 34128684 DOI: 10.1021/acs.orglett.1c01633] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Retigeranic acid A is a uniquely structured pentacyclic sesterterpene bearing eight stereogenic centers. We report a concise route to the core structure of (-)-retigeranic acid A. The stereochemistry of its six chiral centers and three quaternary carbon centers was well-controlled. This route features two intramolecular Pauson-Khand reactions (IMPKRs): the first forged the D and E rings to deliver the triquinane subunit, and the second constructed the A and B rings and diastereoselectively installed the quaternary C6a center.
Collapse
Affiliation(s)
- Xiao Wang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Dian Li
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Junlin Zhang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Jianxian Gong
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China.,Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China.,Shenzhen Bay Laboratory, Shenzhen, Guangdong 518055, China
| |
Collapse
|
41
|
Recent advances in the total synthesis of natural products bearing the contiguous all-carbon quaternary stereocenters. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153029] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|