1
|
Seipp K, Kammler C, Rossdam NO, Eckhardt P, Kiefer AM, Erkel G, Opatz T. Total Synthesis, Structure Reassignment, and Biological Evaluation of the Anti-Inflammatory Macrolactone 13-Hydroxy-14-deoxyoxacyclododecindione. JOURNAL OF NATURAL PRODUCTS 2024; 87:1131-1149. [PMID: 38555526 DOI: 10.1021/acs.jnatprod.4c00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Herein, the first total synthesis of natural 13-hydroxy-14-deoxyoxacyclododecindione along with the revision of the proposed configuration is reported. This natural product, initially discovered in 2018, belongs to the oxacyclododecindione family, renowned for their remarkable anti-inflammatory and antifibrotic activities. The synthetic route involves an esterification/Friedel-Crafts-acylation approach and uses various triol fragments. It allows the preparation of different stereoisomers, including the (revised) natural product, two threo-derivatives, and two Z-isomers of the endocyclic C═C double bond. Furthermore, a late-stage inversion of the C-13 stereocenter could transform the originally proposed structure into the revised natural product. With this comprehensive set of compounds and the previously prepared (13R,14S,15R)-isomer, deeper insights into their structural properties and biological activities were obtained. A detailed analysis of the final macrolactones using spectroscopy (NMR, IR, UV-vis) and X-ray crystallography gave new insights such as the significance of the optical rotation for the elucidation of their configuration and the light-induced E/Z double-bond photoisomerization. The pharmacological potential of the compounds was underlined by remarkably low IC50 values in biological assays addressing the inhibition of cellular inflammatory responses.
Collapse
Affiliation(s)
- Kevin Seipp
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Claudia Kammler
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Nils Ole Rossdam
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Paul Eckhardt
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Anna Maria Kiefer
- Department of Molecular Biotechnology & Systems Biology, RPTU Kaiserslautern-Landau, Paul-Ehrlich-Straße 23, Building 23, 67663 Kaiserslautern, Germany
| | - Gerhard Erkel
- Department of Molecular Biotechnology & Systems Biology, RPTU Kaiserslautern-Landau, Paul-Ehrlich-Straße 23, Building 23, 67663 Kaiserslautern, Germany
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| |
Collapse
|
2
|
Zheng X, Guo X, Wang H, Zhou PP, Chen X. Total Synthesis of (±)-Rubriflordilactone A. J Am Chem Soc 2024; 146:7198-7203. [PMID: 38456819 DOI: 10.1021/jacs.4c01033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
A new and efficient synthesis of rubriflordilactone A has been realized. The key transformations include the following: (1) an intramolecular Prins cyclization to establish the seven-membered ring containing two contiguous stereocenters; (2) a Mukaiyama hydration/oxa-Michael cascade to construct the B-ring; and (3) an unprecedented stereocontrol intermolecular o-QM type [4 + 2]-cycloaddition to rapidly assemble core structure of rubriflordilactone A.
Collapse
Affiliation(s)
- Xudong Zheng
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China
| | - Xinlong Guo
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China
| | - Hongyu Wang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China
| | - Xiaoming Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, Gansu 730000, China
| |
Collapse
|
3
|
Balasubramani A, Ganaie BA, Mehta G. Direct Two Carbon Ring Expansion of 1-Indanones with Ynones: An Eco-Friendly, One-Flask Approach to Functionally Enriched 5H-Benzo[7]annulenes. J Org Chem 2023; 88:15452-15460. [PMID: 37880254 DOI: 10.1021/acs.joc.3c01233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Direct 2C-ring expansion of 1-indanones with ynones to 5H-benzo[7]annulenes has been observed, and its generality has been gauged (19 examples). Overall, this simple and convenient cascade process to 5H-benzo[7]annulenes involves engagement of 1-indanone with two ynone moieties with formation of three new C-C σ-bonds, cleavage of C-C σ-bond, and concurrent functionality amplification. The resulting seven-membered ring, laced with an opportunistic disposition of four proximal functional groups, offers avenues for their further productive interplay. Our new approach embraces many green and eco-friendly features.
Collapse
Affiliation(s)
| | | | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| |
Collapse
|
4
|
Kravljanac P, Anderson EA. Synthetic Study toward Triterpenes from the Schisandraceae Family of Natural Products. Molecules 2023; 28:molecules28114468. [PMID: 37298943 DOI: 10.3390/molecules28114468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/24/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
Triterpenoid natural products from the Schisandraceae family have long presented a significant synthetic challenge. Lancifodilactone I, a member of the family not previously synthesized, was identified as a key natural product target, from which many other members could be synthesized. We envisaged that the core ring system of lancifodilactone I could be accessed by a strategy involving palladium-catalysed cascade cyclisation of a bromoenynamide, via carbopalladation, Suzuki coupling and 8π-electrocyclisation, to synthesize the core 7,8-fused ring system. Exploration of this strategy on model systems resulted in efficient syntheses of 5,6- and 5,8-fused systems in high yields, which represent the first such cyclisation where the ynamide nitrogen atom is 'external' to the forming ring system. The enamide functionality resident in the cascade cyclisation product was found to be less nucleophilic than the accompanying tri-/tetrasubstituted alkene(s), enabling regioselective oxidations. Application of this strategy to 7,6-, and 7,8-fused systems, and ultimately the 'real' substrate, was ultimately thwarted by the difficulty of 7-membered ring closure, leading to side product formation. Nevertheless, a tandem bromoenynamide carbopalladation, Suzuki coupling and 6/8π-electrocyclisation was shown to be a highly efficient tactic for the formation of bicyclic enamides, which may find applications in other synthetic contexts.
Collapse
Affiliation(s)
- Pavle Kravljanac
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| | - Edward A Anderson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK
| |
Collapse
|
5
|
Li L, Li P, Li T, Zhang M, Liu W, Li J, Wang L, Chen Y. Synthesis of the ABC ring system of kadlongilactones. Org Biomol Chem 2023; 21:1704-1708. [PMID: 36749621 DOI: 10.1039/d2ob01701f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A racemic approach towards the synthesis of the ABC (7/7/5) ring system of Schisandra triterpenoid kadlongilactones is described. The synthesis features two key transformations: (1) conjugate addition followed by iodolactonization to build the cis-fused 7/7 ring; and (2) conjugate addition-Rubottom oxidation cascade followed by ring-closing metathesis to construct the 7/7/5 tricyclic ring.
Collapse
Affiliation(s)
- Liang Li
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
| | - Pengfei Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Tianhao Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Mingxiao Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Wenjie Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300350, People's Republic of China
| | - Jing Li
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
| | - Liang Wang
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
| | - Yue Chen
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
| |
Collapse
|
6
|
Xing Z, Fang B, Luo S, Xie X, Wang X. Generation of Fused Seven-Membered Polycyclic Systems via Ring Expansion and Application to the Total Synthesis of Sesquiterpenoids. Org Lett 2022; 24:4034-4039. [PMID: 35647899 DOI: 10.1021/acs.orglett.2c01401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Seven-membered polycyclic architectures, widely present in natural products and molecular drugs, are challenging synthetic targets. However, methods for synthesizing fused medium-sized bicyclo[m.n.0] ring systems, including the benzo-cycloheptane systems, are still urgent. Herein we describe a base-induced ring expansion as a general strategy to construct a wide range of fused seven-membered ring systems. The application of this method was demonstrated by the efficient total syntheses of two sesquiterpenoids, plecarpenene and plecarpenone, both bearing a fused bicyclo[5.3.0]decane skeleton.
Collapse
Affiliation(s)
- Zhimin Xing
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Bowen Fang
- Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, Gansu Provincial Biomass Function Composites Engineering Research Center, College of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China
| | - Shangwen Luo
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
7
|
Wang X, Wang Z, Ma X, Huang Z, Sun K, Gao X, Fu S, Liu B. Asymmetric Total Synthesis of Shizukaol J, Trichloranoid C and Trishizukaol A. Angew Chem Int Ed Engl 2022; 61:e202200258. [PMID: 35102682 DOI: 10.1002/anie.202200258] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Indexed: 01/14/2023]
Abstract
The asymmetric total synthesis of three lindenane sesquiterpenoid oligomers, shizukaol J, trichloranoid C and trishizukaol A, has been accomplished concisely in 15, 16 and 18 longest linear steps, respectively. The expeditious construction of molecular architectures was facilitated by Nelson's catalytic asymmetric ketene-aldehyde cycloaddition, a sequence of allylic alkylation/reduction/acidic cyclization to forge a lactone, and a double aldol condensation cascade to construct the 5/6 bicyclic system. Diastereoselective nucleophilic substitution promoted by a phase transfer catalyst constructed the C11 quaternary stereogenic center, thus prompting synthetic efficacy toward shizukaol J. The synthesis of trichloranoid C and trishizukaol A was achieved after a cascade involving furanyl diene formation and a Diels-Alder reaction, as well as a one-pot sequence involving furan oxidation and global deprotection. Furthermore, our biological evaluation revealed that two compounds exhibited unexpected toxicity against tumor cell lines.
Collapse
Affiliation(s)
- Xiao Wang
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| | - Zhuang Wang
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| | - Xianjian Ma
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| | - Zhengsong Huang
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| | - Ke Sun
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Rd., Xiamen, Fujian, 361102, China
| | - Xiang Gao
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Rd., Xiamen, Fujian, 361102, China
| | - Shaomin Fu
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| | - Bo Liu
- College of Chemistry, Sichuan University, 29 Wangjiang Rd., Chengdu, Sichuan, 610064, China
| |
Collapse
|
8
|
Wang X, Wang Z, Ma X, Huang Z, Sun K, Gao X, Fu S, Liu B. Asymmetric Total Synthesis of Shizukaol J, Trichloranoid C and Trishizukaol A. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200258] [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)
- Xiao Wang
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Zhuang Wang
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Xianjian Ma
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Zhengsong Huang
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Ke Sun
- School of Pharmaceutical Sciences Xiamen University South Xiangan Rd. Xiamen Fujian 361102 China
| | - Xiang Gao
- School of Pharmaceutical Sciences Xiamen University South Xiangan Rd. Xiamen Fujian 361102 China
| | - Shaomin Fu
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| | - Bo Liu
- College of Chemistry Sichuan University 29 Wangjiang Rd. Chengdu Sichuan 610064 China
| |
Collapse
|
9
|
Nicewicz DA, Roth HG. Diastereoselective Synthesis of the ABCD Ring System of Rubriflordilactone B. Synlett 2022. [DOI: 10.1055/a-1659-6521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractA novel nine-step diastereoselective route to the ABCD ring system of the natural product rubriflordilactone B is reported. Use of an α-substituted butenolide derived from maleic anhydride facilitated a 1,4-conjugate addition to provide a diene. The order in which a ring-closing metathesis and enolate oxidation were performed on this compound dictated the relative stereochemistry of the target. The final product exhibited anisotropic effects during room-temperature NMR studies, requiring elevated-temperature experiments to confirm its identity.
Collapse
|
10
|
Abstract
Chemical transformations that rapidly and efficiently construct a high level of molecular complexity in a single step are perhaps the most valuable in total synthesis. Among such transformations is the transition metal catalyzed [2 + 2 + 2] cycloisomerization reaction, which forges three new C-C bonds and one or more rings in a single synthetic operation. We report here a strategy that leverages this transformation to open de novo access to the Veratrum family of alkaloids. The highly convergent approach described herein includes (i) the enantioselective synthesis of a diyne fragment containing the steroidal A/B rings, (ii) the asymmetric synthesis of a propargyl-substituted piperidinone (F ring) unit, (iii) the high-yielding union of the above fragments, and (iv) the intramolecular [2 + 2 + 2] cycloisomerization reaction of the resulting carbon framework to construct in a single step the remaining three rings (C/D/E) of the hexacyclic cevanine skeleton. Efficient late-stage maneuvers culminated in the first total synthesis of heilonine (1), achieved in 21 steps starting from ethyl vinyl ketone.
Collapse
Affiliation(s)
- Kyle J Cassaidy
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Viresh H Rawal
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| |
Collapse
|
11
|
Nazarski RB. Summary of DFT calculations coupled with current statistical and/or artificial neural network (ANN) methods to assist experimental NMR data in identifying diastereomeric structures. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152548] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
12
|
Parella R, Jakkampudi S, Zhao JC. Recent Applications of Asymmetric Organocatalytic Methods in Total Synthesis. ChemistrySelect 2021. [DOI: 10.1002/slct.202004196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ramarao Parella
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio, Texas 78249-0698 USA
| | - Satish Jakkampudi
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio, Texas 78249-0698 USA
| | - John C.‐G. Zhao
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio, Texas 78249-0698 USA
| |
Collapse
|
13
|
Fan JH, Hu YJ, Li LX, Wang JJ, Li SP, Zhao J, Li CC. Recent advances in total syntheses of natural products containing the benzocycloheptane motif. Nat Prod Rep 2021; 38:1821-1851. [PMID: 33650613 DOI: 10.1039/d1np00003a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering: 2010 to 2020Benzocycloheptane is a fundamental and unique structural motif found in pharmaceuticals and natural products. The total syntheses of natural products bearing the benzocycloheptane subunit are challenging and there are only a few efficient approaches to access benzocycloheptane. Thus, new methods and innovative strategies for preparing such natural products need to be developed. In this review, recent progress in the total syntheses of natural products bearing the benzocycloheptane motif is presented, and key transformations for the construction of benzocycloheptane are highlighted. This review provides a useful guide for those engaged in the syntheses of natural products containing the benzocycloheptane motif.
Collapse
Affiliation(s)
- Jian-Hong Fan
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Ya-Jian Hu
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Li-Xuan Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jing-Jing Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Shao-Ping Li
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Jing Zhao
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| |
Collapse
|
14
|
Guo L, Tang P. Recent Advance in the Synthesis of Natural Products of Schisandra Triterpenoid. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202105049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
15
|
Jiang Y, McNamee RE, Smith PJ, Sozanschi A, Tong Z, Anderson EA. Advances in polycyclization cascades in natural product synthesis. Chem Soc Rev 2021; 50:58-71. [DOI: 10.1039/d0cs00768d] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cascade reactions are among the most powerful means to achieve the construction of multiple ring systems in a single step. This tutorial review describes recent advances in the use of polycyclization cascades in natural product synthesis.
Collapse
Affiliation(s)
- Yubo Jiang
- Chemistry Research Laboratory
- Oxford
- UK
- Faculty of Science
- Kunming University of Science and Technology
| | | | | | | | | | | |
Collapse
|
16
|
Villamizar-Mogotocoro AF, León-Rojas AF, Urbina-González JM. Δα,β-Butenolides [Furan-2(5H)-ones]: Ring Construction Approaches and Biological Aspects - A Mini-Review. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x17666200220130735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The five-membered oxacyclic system of furan-2(5H)-ones, commonly named as γ-
butenolides or appropriately as Δ<sup>α,β</sup>-butenolides, is of high interest since many studies have proven its
bioactivity. During the past few years, Δ<sup>α,β</sup>-butenolides have been important synthetic targets, with
several reports of new procedures for their construction. A short compendium of the main different
synthetic methodologies focused on the Δ<sup>α,β</sup>-butenolide ring formation, along with selected examples
of compounds with relevant biological activities of these promising pharmaceutical entities is presented.
Collapse
Affiliation(s)
| | - Andrés-Felipe León-Rojas
- Department of Organic Chemistry, Faculty of Chemistry, Universidad Nacional Autónoma de México, México D.F., Mexico
| | | |
Collapse
|
17
|
He TB, Yan BC, Hu K, Li XN, Sun HD, Puno PT. Neuroprotective schinortriterpenoids with diverse scaffolds from Schisandra henryi. Bioorg Chem 2020; 105:104353. [DOI: 10.1016/j.bioorg.2020.104353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 09/28/2020] [Accepted: 10/04/2020] [Indexed: 11/30/2022]
|
18
|
Wang Y, Chen B, He X, Gui J. Development of Biomimetic Synthesis of Propindilactone G
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yu Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences Shanghai 200032 China
| | - Bo Chen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences Shanghai 200032 China
| | - Xubiao He
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences Shanghai 200032 China
| | - Jinghan Gui
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences Shanghai 200032 China
| |
Collapse
|
19
|
del Pozo J, Zhang S, Romiti F, Xu S, Conger RP, Hoveyda AH. Streamlined Catalytic Enantioselective Synthesis of α-Substituted β,γ-Unsaturated Ketones and Either of the Corresponding Tertiary Homoallylic Alcohol Diastereomers. J Am Chem Soc 2020; 142:18200-18212. [PMID: 33016068 PMCID: PMC7775104 DOI: 10.1021/jacs.0c08732] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A widely applicable, practical, and scalable strategy for efficient and enantioselective synthesis of β,γ-unsaturated ketones that contain an α-stereogenic center is disclosed. Accordingly, aryl, heteroaryl, alkynyl, alkenyl, allyl, or alkyl ketones that contain an α-stereogenic carbon with an alkyl, an aryl, a benzyloxy, or a siloxy moiety can be generated from readily available starting materials and by the use of commercially available chiral ligands in 52-96% yield and 93:7 to >99:1 enantiomeric ratio. To develop the new method, conditions were identified so that high enantioselectivity would be attained and the resulting α-substituted NH-ketimines, wherein there is strong C═N → B(pin) coordination, would not epimerize before conversion to the derived ketone by hydrolysis. It is demonstrated that the ketone products can be converted to an assortment of homoallylic tertiary alcohols in 70-96% yield and 92:8 to >98:2 dr-in either diastereomeric form-by reactions with alkyl-, aryl-, heteroaryl-, allyl-, vinyl-, alkynyl-, or propargyl-metal reagents. The utility of the approach is highlighted through transformations that furnish other desirable derivatives and a concise synthesis route affording more than a gram of a major fragment of anti-HIV agents rubriflordilactones A and B and a specific stereoisomeric analogue.
Collapse
Affiliation(s)
- Juan del Pozo
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
| | - Shaochen Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
| | - Filippo Romiti
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
- Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000 Strasbourg, France
| | - Shibo Xu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
| | - Ryan P. Conger
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
| | - Amir H. Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
- Supramolecular Science and Engineering Institute, University of Strasbourg, CNRS, 67000 Strasbourg, France
| |
Collapse
|
20
|
Marcarino MO, Zanardi MM, Cicetti S, Sarotti AM. NMR Calculations with Quantum Methods: Development of New Tools for Structural Elucidation and Beyond. Acc Chem Res 2020; 53:1922-1932. [PMID: 32794691 DOI: 10.1021/acs.accounts.0c00365] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Structural elucidation is an important and challenging stage in the discovery of new organic molecules. Single-crystal X-ray analysis provides the most unquestionable results, though in practice the availability of suitable crystals limits its broad use. On the other hand, NMR spectroscopy has become the leading and universal technique to accomplish the task. Despite continuous advances in the field, the misinterpretation of NMR data is commonplace, evidenced by the large number of erroneous structures being published in top journals. Quantum calculations of NMR chemical shifts and scalar coupling constants emerged as ideal complements to facilitate the elucidation process when experimental NMR data is inconclusive. Since seminal reports demonstrated that affordable DFT methods provide NMR predictions accurate enough to differentiate among closely related isomers, the discipline has experienced substantial growth. The impact has been felt in different areas, and nowadays the results of such calculations are routinely seen in high impact literature.This Account describes our investigations in the field of quantum NMR calculations, focusing on the development of tools for structural elucidation and practical applications. We pioneered the use of artificial intelligence methods in the development of novel strategies of structural validation. Our first generation of trained artificial neural networks (ANNs) showed excellent ability to identify mistakes at the atom connectivity level, whereas the use of multidimensional pattern recognition pushed the performance to the stereochemical limit. In a conceptually different approach, we developed DP4+, an updated version of the DP4 probability used to determine the most likely structure among two or more candidates when one set of experimental data is available. Increasing the level of theory in NMR calculations and including unscaled data in the formalism improved the performance of the method, further validated to settle the configuration of challenging motifs such as spiroepoxides or Mosher's derivatives. One of the limitations of DP4+ is related to the relatively large computational cost involved in obtaining DFT-optimized geometries, which led to the development of a fast variant including the valuable information provided by coupling constants (J-DP4 method).These tools were explored to suggest the most probable structure of controversial natural or unnatural products originally misassigned, with some predictions further validated by synthesis (as in the case of pseudorubriflordilactone B). The possibility of predicting the structure of a natural product without requiring authentic sample was investigated in collaboration with Prof. Pilli (UNICAMP, Brazil) in the computer-guided total synthesis and stereochemical revisions of several natural products. Despite these advances, there remain considerable challenges, such as the case of configurational assessment of polar systems featuring multiple intramolecular hydrogen bonding interactions because of the poor energy predictions provided by most DFT methods. In our latest work, we tackle this problem by averaging the results provided by randomly generated ensembles, paving the way for a new paradigm in quantum NMR-assisted structural elucidation.
Collapse
Affiliation(s)
- Maribel O. Marcarino
- Instituto de Quı́mica Rosario (CONICET), Facultad de Ciencias Bioquı́micas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina
| | - Marı́a M. Zanardi
- Instituto de Ingenierı́a Ambiental, Quı́mica y Biotecnologı́a Aplicada (INGEBIO), Facultad de Quı́mica e Ingenierı́a del Rosario, Pontificia Universidad Católica Argentina, Av. Pellegrini 3314, S2002QEO Rosario, Argentina
| | - Soledad Cicetti
- Instituto de Quı́mica Rosario (CONICET), Facultad de Ciencias Bioquı́micas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina
| | - Ariel M. Sarotti
- Instituto de Quı́mica Rosario (CONICET), Facultad de Ciencias Bioquı́micas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina
| |
Collapse
|
21
|
Mies T, Ma TK, Barrett AGM. Syntheses of polyfunctional aromatic compounds from non-aromatic precursors. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
22
|
Verdugo F, da Concepción E, Rodiño R, Calvelo M, Mascareñas JL, López F. Pd-Catalyzed (3 + 2) Heterocycloadditions between Alkylidenecyclopropanes and Carbonyls: Straightforward Assembly of Highly Substituted Tetrahydrofurans. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01827] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Felipe Verdugo
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Eduardo da Concepción
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ricardo Rodiño
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Martín Calvelo
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - José L. Mascareñas
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Fernando López
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Instituto de Quı́mica Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| |
Collapse
|
23
|
Hu YJ, Li LX, Han JC, Min L, Li CC. Recent Advances in the Total Synthesis of Natural Products Containing Eight-Membered Carbocycles (2009-2019). Chem Rev 2020; 120:5910-5953. [PMID: 32343125 DOI: 10.1021/acs.chemrev.0c00045] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Natural products containing eight-membered carbocycles constitute a class of structurally intriguing and biologically important molecules such as the famous diterpenes taxol and vinigrol. Such natural products are being increasingly investigated because of their fascinating architectural features and potent medicinal properties. However, synthesis of natural products with cyclooctane moieties has proved to be highly challenging. This review highlights the recently completed total syntheses of natural products with eight-membered carbocycles with a focus on strategic considerations. A collection of 27 representative studies from the literature covering the decade from 2009 to 2019 is described in chronological order with relevant studies grouped together, including syntheses of the same natural product by different research groups using different strategies. Finally, a summary and outlook including a discussion of the major features of each strategy used in the syntheses are presented. This review illustrates the diversity and creativity in the elegant synthetic designs of eight-membered carbocycles. We hope this review will provide timely illumination and beneficial guidance for future synthetic efforts for organic chemists who are interested in this area.
Collapse
Affiliation(s)
- Ya-Jian Hu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Li-Xuan Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Jing-Chun Han
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Long Min
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| |
Collapse
|
24
|
Wang Y, Chen B, He X, Gui J. Bioinspired Synthesis of Nortriterpenoid Propindilactone G. J Am Chem Soc 2020; 142:5007-5012. [DOI: 10.1021/jacs.0c00363] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yu Wang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Bo Chen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xubiao He
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jinghan Gui
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| |
Collapse
|
25
|
Bhat BA, Rashid S, Sengupta S, Mehta G. Recent Advances in Total Synthesis of Bioactive Furo[3,2‐
b
]furanone Natural Products. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bilal A. Bhat
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | - Showkat Rashid
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | | | - Goverdhan Mehta
- School of ChemistryUniversity of Hyderabad Hyderabad 500046 India
| |
Collapse
|
26
|
Fu S, Liu B. Recent progress in the synthesis of limonoids and limonoid-like natural products. Org Chem Front 2020. [DOI: 10.1039/d0qo00203h] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent progress in syntheses of limonoids and limonoid-like natural products is reviewed. The current “state-of-art” advance on novel synthetic strategy are summarized and future outlook will be presented.
Collapse
Affiliation(s)
- Shaomin Fu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Bo Liu
- Key Laboratory of Green Chemistry &Technology of the Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| |
Collapse
|
27
|
Mohammad M, Chintalapudi V, Carney JM, Mansfield SJ, Sanderson P, Christensen KE, Anderson EA. Convergent Total Syntheses of (-)-Rubriflordilactone B and (-)-pseudo-Rubriflordilactone B. Angew Chem Int Ed Engl 2019; 58:18177-18181. [PMID: 31595605 PMCID: PMC6973266 DOI: 10.1002/anie.201908917] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/20/2019] [Indexed: 12/03/2022]
Abstract
A highly convergent strategy for the synthesis of the natural product (-)-rubriflordilactone B, and the proposed structure of (-)-pseudo-rubriflordilactone B, is described. Late stage coupling of diynes containing the respective natural product FG rings with a common AB ring aldehyde precedes rhodium-catalyzed [2+2+2] alkyne cyclotrimerization to form the natural product skeleton, with the syntheses completed in just one further operation. This work resolves the uncertainty surrounding the identity of pseudo-rubriflordilactone B and provides a robust platform for further synthetic and biological investigations.
Collapse
Affiliation(s)
- Mujahid Mohammad
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | | | - Jeffrey M. Carney
- Department of Molecular Biology and ChemistryChristopher Newport University1 Avenue of the ArtsNewport NewsVA23606USA
| | - Steven J. Mansfield
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Pollyanna Sanderson
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | | | - Edward A. Anderson
- Chemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| |
Collapse
|
28
|
Jiang YL, Yu HX, Li Y, Qu P, Han YX, Chen JH, Yang Z. Asymmetric Total Synthesis of Pre-schisanartanin C. J Am Chem Soc 2019; 142:573-580. [DOI: 10.1021/jacs.9b11872] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yan-Long Jiang
- 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
| | - Hai-Xin Yu
- 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
| | - Yong Li
- 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
| | - Pei Qu
- 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
| | - Yi-Xin Han
- 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
| | - Jia-Hua Chen
- 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
| | - Zhen Yang
- 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
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| |
Collapse
|
29
|
Yang P, Li J, Sun L, Yao M, Zhang X, Xiao WL, Wang JH, Tian P, Sun HD, Puno PT, Li A. Elucidation of the Structure of Pseudorubriflordilactone B by Chemical Synthesis. J Am Chem Soc 2019; 142:13701-13708. [PMID: 31707779 DOI: 10.1021/jacs.9b09699] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Peng Yang
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450052, China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Li Sun
- Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ming Yao
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiang Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Wei-Lie Xiao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jian-Hua Wang
- Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ping Tian
- The Research Center of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China
| | - Han-Dong Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Pema-Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450052, China
| |
Collapse
|