1
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Wang Z, Song Z, Huang J, Yang Z. Total Synthesis of Penicibilaenes Enabled by a Tandem Double Conia-ene Type Reaction. J Am Chem Soc 2024; 146:4363-4368. [PMID: 38329963 DOI: 10.1021/jacs.3c14614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
The total syntheses of penicibilaenes A and B are described. The key step is the tBuOK/DMSO-mediated tandem 5-exo-dig Conia-ene type reaction and 6-exo-dig Conia-ene type reaction to install the tricyclic [6.3.1.01,5] dodecane core of penicibilaenes from dibutynyl cyclohexanone in a single step, together with a sequence of copper-mediated conjugate addition and Crabtree's hydrogenation to forge the stereogenic centers at C5 and C2, respectively.
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Affiliation(s)
- Zheyuan Wang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhilin Song
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Jun Huang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Beijing National Laboratory for Molecular Science and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
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2
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Ma Y. Ambimodal Addition-Coupled Electron Transfer Mechanism in a Pb(IV)-Promoted Oxidative Dearomatization Reaction. J Org Chem 2024; 89:224-232. [PMID: 38100374 DOI: 10.1021/acs.joc.3c01956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
The mechanism of the Pb(IV)-promoted phenol oxidative dearomatization reaction has been traditionally attributed to a carbocation mechanism. In 2011, Pettus reported an oxidative dearomatization reaction leading to a mixture of a formal [5 + 2] and a C-O bond formation product. By employing density functional theory and quasi-molecular dynamics calculations, it was demonstrated that the reaction does not occur through a carbocation intermediate but instead proceeds through an addition-coupled electron transfer (ACET) mechanism. Moreover, the ACET exhibits ambimodality, wherein a transition state results in 4-6 distinct outcomes through post-TS bifurcation. The reported selectivity can be effectively rationalized by a newly proposed mechanism.
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Affiliation(s)
- Yumiao Ma
- BSJ Institute, Haidian, Beijing 100084, People's Republic of China
- Hangzhou Yanqu Information Technology Co., Ltd., Xihu District, Hangzhou, Zhejiang 310003, People's Republic of China
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3
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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.
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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
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4
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Huck CJ, Boyko YD, Sarlah D. Dearomative logic in natural product total synthesis. Nat Prod Rep 2022; 39:2231-2291. [PMID: 36173020 PMCID: PMC9772301 DOI: 10.1039/d2np00042c] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Covering: 2011 to 2022The natural world is a prolific source of some of the most interesting, rare, and complex molecules known, harnessing sophisticated biosynthetic machinery evolved over billions of years for their production. Many of these natural products represent high-value targets of total synthesis, either for their desirable biological activities or for their beautiful structures outright; yet, the high sp3-character often present in nature's molecules imparts significant topological complexity that pushes the limits of contemporary synthetic technology. Dearomatization is a foundational strategy for generating such intricacy from simple materials that has undergone considerable maturation in recent years. This review highlights the recent achievements in the field of dearomative methodology, with a focus on natural product total synthesis and retrosynthetic analysis. Disconnection guidelines and a three-phase dearomative logic are described, and a spotlight is given to nature's use of dearomatization in the biosynthesis of various classes of natural products. Synthetic studies from 2011 to 2021 are reviewed, and 425 references are cited.
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Affiliation(s)
| | - Yaroslav D. Boyko
- Department of Chemistry, University of Illinois, Urbana, IL 61801, USA
| | - David Sarlah
- Department of Chemistry, University of Illinois, Urbana, IL 61801, USA,Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
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5
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Zhang Y, Chi Z, Li X, Xie Z. Highly Stereocontrolled Total Syntheses of Cedrane Sesquiterpenes via Cascade [5+2] Cycloaddition/Etherification. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100737] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuhan Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Zhiyong Chi
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Xiangxin Li
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou Gansu 730000 China
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6
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Khatua A, Pal S, Das MK, Bisai V. Asymmetric total syntheses of (–)-ar-turmerone, (–)-dihydro-ar-turmerone, (–)-ar-dehydrocurcumene, and (–)-ar-himachalene via a key allylic oxidative rearrangement. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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7
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George JH. Biomimetic Dearomatization Strategies in the Total Synthesis of Meroterpenoid Natural Products. Acc Chem Res 2021; 54:1843-1855. [PMID: 33793197 DOI: 10.1021/acs.accounts.1c00019] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Natural products are biosynthesized from a limited pool of starting materials via pathways that obey the same chemical logic as textbook organic reactions. Given the structure of a natural product, it is therefore often possible to predict its likely biosynthesis. Although biosynthesis mainly occurs in the highly specific chemical environments of enzymes, the field of biomimetic total synthesis attempts to replicate predisposed pathways using chemical reagents.We have followed several guidelines in our biomimetic approach to total synthesis. The overarching aim is to construct the same skeletal C-C and C-heteroatom bonds and in the same order as our biosynthetic hypothesis. In order to explore the innate reactivity of (bio)synthetic intermediates, the use of protecting groups is avoided or at least minimized. The key step, which is usually a cascade reaction, should be predisposed to selectively generate molecular complexity under substrate control (e.g., cycloadditions, radical cyclizations, carbocation rearrangements). In general, simple reagents and mild conditions are used; many of the total syntheses presented in this Account could be achieved using pre-1980s methodology. We have focused almost exclusively on the synthesis of meroterpenoids, that is, natural products of mixed terpene and aromatic polyketide origin, using commercially available terpenes and electron-rich aromatic compounds as starting materials. Finally, all of the syntheses in this Account involve a dearomatization step as a means to trigger a cascade reaction or to construct stereochemical complexity from a planar, aromatic intermediate.A biomimetic strategy can offer several advantages to a total synthesis project. Most obviously, successful biomimetic syntheses are usually concise and efficient, naturally adhering to the atom, step, and redox economies of synthesis. For example, in this Account, we describe a four-step synthesis of garcibracteatone and a three-step synthesis of nyingchinoid A. It is difficult to imagine shorter, non-biomimetic syntheses of these intricate molecules. Furthermore, biomimetic synthesis gives insight into biosynthesis by revealing the chemical relationships between biosynthetic intermediates. Access to these natural substrates allows collaboration with biochemists to help uncover the function of newly discovered enzymes and elucidate biosynthetic pathways, as demonstrated in our work on the napyradiomycin family. Third, by making biosynthetic connections between natural products, we can sometimes highlight incorrect structural assignments, and herein we discuss structure revisions of siphonodictyal B, rasumatranin D, and furoerioaustralasine. Last, biomimetic synthesis motivates the prediction of "undiscovered natural products" (i.e., missing links in biosynthesis), which inspired the isolation of prenylbruceol A and isobruceol.
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Affiliation(s)
- Jonathan H. George
- Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia
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8
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Wu T, Tang W. Construction of Bridged Polycyclic Skeletons via Transition-Metal Catalyzed Carbon-Carbon Bond-Forming Reactions. Chemistry 2021; 27:3944-3956. [PMID: 32918298 DOI: 10.1002/chem.202003863] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/10/2020] [Indexed: 12/15/2022]
Abstract
Transition-metal catalysis has become one of most important methods for constructing molecules with diverse architectures. Bridged polycyclic skeletons are often considered one of most challenging structures in organic synthesis. This Minireview summarizes the recent progress on synthesis of bridged polycyclic skeletons by transition-metal-catalyzed carbon-carbon bond-forming reaction. Four main ring-forming strategies including connection via olefin or carbonyl functionality, enolate intermediacy, C-H functionality, and aryl functionality are detailed and some effective methods are discussed with particular emphasis on reaction design and mechanism.
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Affiliation(s)
- Ting Wu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China.,School of Chemistry and Materials Science Hangzhou Institute for, Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, P. R. China
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9
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Gao K, Hu J, Ding H. Tetracyclic Diterpenoid Synthesis Facilitated by ODI-Cascade Approaches to Bicyclo[3.2.1]octane Skeletons. Acc Chem Res 2021; 54:875-889. [PMID: 33508196 DOI: 10.1021/acs.accounts.0c00798] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tetracyclic diterpenoids (C20) mainly refer to the plant terpenoids bearing biogenetically related carbon skeletons derived from copalyl diphosphates (ent-CPP and syn-CPP). This large family contains over 1600 known members that can be categorized into 11 major structural types. Among them, more than three-quarters share a bridged bicyclo[3.2.1]octane subunit, which is also an important branching point in biosynthesis en route to the other types of bicyclic scaffolds, such as bicyclo[2.2.2]-, bicyclo[3.3.0]-, and tricyclo[3.2.1.0]octanes. Combined with the significance of its stereochemical importance in biological activity, the assembly of the bicyclo[3.2.1]octane skeletons is critical to the success of the whole synthesis blueprint toward tetracyclic diterpenoids. Although a number of inspiring methodologies have been disclosed, general approaches by the incorporation of innovative cascade reactions permitting access to diverse structural types of tetracyclic diterpenoids remain limited and in urgent demand.Because of the long-standing interest in the synthesis of bridged diterpenoids, we have recently developed two complementary types of oxidative dearomatization induced (ODI) cascade approaches to the rapid and efficient construction of bicyclo[3.2.1]octane skeletons. In this Account, we summarize our original synthesis design, methodology development, and the application of these two strategies in tetracyclic diterpenoid synthesis during the past few years in our laboratory.First, we detail our preliminary investigation of the ODI-[5 + 2] cycloaddition/pinacol rearrangement cascade reaction, which showed a wide scope of vinylphenol substrates and led to cyclopentane and cyclohexane-fused bicyclo[3.2.1]octanes in good yields with excellent dr values. Next, we describe the utilization of this ODI-[5 + 2] cascade reaction which resulted in the asymmetric total syntheses of four highly oxygenated ent-kauranoids. The strategy concerning accurate stereochemical control in the ODI-[5 + 2] cycloaddition was then successfully transplanted to the total syntheses of three stemaranoids, thus providing a straightforward and diastereoselective route to C9-ethano-bridged tetracyclic diterpenoids. To access more complex diterpenoid rhodomollanol A, we exploited two additional biomimetic rearrangements, namely, the retro-Dieckmann fragmentation/vinylogous Dieckmann cyclization cascade and the photo-Nazarov cyclization/intramolecular cycloetherification cascade. Taken together with the ODI-[5 + 2] cascade, the asymmetric total synthesis of the target molecule was realized, which shed light on the biogenetic pathway of the unprecedented rhodomollane-type carbon framework. Finally, we describe an ODI-Diels-Alder/Beckwith-Dowd cascade approach as a valuable supplement to the ODI-[5 + 2] cascade for the fabrication of cycloheptane-fused bicyclo[3.2.1]octane skeletons. Its versatility was also demonstrated by the total syntheses of two challenging grayanane diterpenoids. In view of the high functional-group compatibility and scalability, we anticipate that the two novel cascade approaches will find further use in the field of complex natural product synthesis.
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Affiliation(s)
- Kai Gao
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou 318000, China
| | - Jialei Hu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Ding
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou 318000, China
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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10
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Baker Dockrey SA, Narayan ARH. Photocatalytic Oxidative Dearomatization of Orcinaldehyde Derivatives. Org Lett 2020; 22:3712-3716. [PMID: 32293185 DOI: 10.1021/acs.orglett.0c01207] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
For decades, oxidative dearomatization has been employed as a key step in the synthesis of complex molecules. Challenges in controlling the chemo- and site-selectivity of this transformation have sparked the development of a variety of specialized oxidants; however, these result in stoichiometric amounts of organic byproducts. Herein, we describe a photocatalytic method for oxidative dearomatization using molecular oxygen as the stoichiometric oxidant. This provides environmentally benign entry to highly substituted o-quinols, reactive intermediates which can be elaborated to a number of natural product families.
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Affiliation(s)
- Summer A Baker Dockrey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States.,Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alison R H Narayan
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States.,Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States.,Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
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11
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Kuila B, Sharma P, Mahajan D, Singh P, Bhargava G. Rhodium-catalysed chemo- and regio-selective [3 + 2+2] cycloadditions of bis(methylenecyclopropanes) and alkynes: Synthesis of spirocyclic 5–7 condensed cycloheptenes. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1720738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Bilash Kuila
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
| | - Priyanka Sharma
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
| | - Dinesh Mahajan
- Drug Discovery Research Center, Translational Health Science and Technology Institute, Faridabad, India
| | - Prabhpreet Singh
- Department of Chemistry, Guru Nanak Dev University, Amritsar, India
| | - Gaurav Bhargava
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
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12
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Oguma T, Doiuchi D, Fujitomo C, Kim C, Hayashi H, Uchida T, Katsuki T. Iron‐Catalyzed Asymmetric Inter‐ and Intramolecular Aerobic Oxidative Dearomatizing Spirocyclization of 2‐Naphthols. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Takuya Oguma
- Department of Chemistry, Graduate School of ScienceKyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Daiki Doiuchi
- Department of Chemistry, Graduate School of ScienceKyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Chisaki Fujitomo
- Department of Chemistry, Graduate School of ScienceKyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Chungsik Kim
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)Kyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Hiroki Hayashi
- Faculty of Arts and ScienceKyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Tatsuya Uchida
- Faculty of Arts and ScienceKyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)Kyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
| | - Tsutomu Katsuki
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)Kyushu University 744, Motooka Nishi-ku, Fukuoka 819-0395 Japan
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13
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Liu X, Zhang J, Bai L, Wang L, Yang D, Wang R. Catalytic asymmetric multiple dearomatizations of phenols enabled by a cascade 1,8-addition and Diels-Alder reaction. Chem Sci 2019; 11:671-676. [PMID: 34123039 PMCID: PMC8146773 DOI: 10.1039/c9sc05320d] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A direct catalytic asymmetric multiple dearomatization reaction of phenols was disclosed, which provides expedient access to a series of architecturally complex polycyclic compounds bearing four stereogenic centers in high enantiopurity. The key to achieve such a transformation is the combination of a dearomative 1,8-addition of β-naphthols to para-quinone methides generated in situ from propargylic alcohols and a subsequent intramolecular dearomative Diels–Alder reaction. Noteworthily, this protocol enrichs not only the diversity of dearomatized products but also the toolbox of dearomatization strategies. The first chiral phosphoric acid catalyzed asymmetric multiple dearomatizations of phenols for the synthesis of bridged polycyclic compounds are reported.![]()
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Affiliation(s)
- Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
| | - Jingying Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
| | - Lutao Bai
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
| | - Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Lanzhou University Lanzhou 730000 China
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14
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Carrër A, Turban S, Provost N, Caliez A, Lamarche G, Zanirato G, Beucher M, Pean C, Mirguet O, Perron-Sierra F, Michelet V. Juniperanol: First total synthesis and evaluation in Type 2 Diabetes disease. Bioorg Chem 2019; 92:103243. [PMID: 31518756 DOI: 10.1016/j.bioorg.2019.103243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/31/2019] [Accepted: 08/31/2019] [Indexed: 01/19/2023]
Abstract
The first total synthesis of juniperanol, the tricyclic sesquiterpenoid enantiomer of α-cedrol is described. The synthesis relies on stereoselective gold-catalyzed Ohloff-type propargylic ester rearrangement performed on a 10 g scale, and a carbocationic cascade in the presence of acetyl methanesulfonate. The ability of juniperanol to interfere in glucose processes in different cell types is described.
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Affiliation(s)
- A Carrër
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, 11 rue P. et M. Curie, 75005 Paris, France
| | - S Turban
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - N Provost
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - A Caliez
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - G Lamarche
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - G Zanirato
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - M Beucher
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - C Pean
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - O Mirguet
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - F Perron-Sierra
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - V Michelet
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, 11 rue P. et M. Curie, 75005 Paris, France; University Côte d'Azur, Institut de Chimie de Nice, Parc Valrose, Faculté des Sciences, 06100 Nice, France
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15
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Péault L, Nun P, Le Grognec E, Coeffard V. Multicatalytic dearomatization of phenols into epoxyquinols via a photooxygenation process. Chem Commun (Camb) 2019; 55:7398-7401. [PMID: 31180096 DOI: 10.1039/c9cc03068a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A multicatalytic photooxygenation of substituted phenols in the presence of rose bengal and cesium carbonate under green LED light is reported. This transformation enabled the introduction of both atoms of singlet oxygen and led to the one-pot synthesis of epoxyquinols in a stereoselective way.
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Affiliation(s)
- Louis Péault
- University of Nantes, CNRS, CEISAM UMR CNRS 6230, F-44000, Nantes, France.
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16
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Gao K, Zhang YG, Wang Z, Ding H. Recent development on the [5+2] cycloadditions and their application in natural product synthesis. Chem Commun (Camb) 2019; 55:1859-1878. [DOI: 10.1039/c8cc09077g] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The recent developments on the [5+2] cycloadditions and their application in the synthesis of complex natural products are discussed.
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Affiliation(s)
- Kai Gao
- Institute of Medicinal Natural Products
- School of Advanced Study
- Taizhou University
- Taizhou 318000
- P. R. China
| | - Yong-Gang Zhang
- Institute of Medicinal Natural Products
- School of Advanced Study
- Taizhou University
- Taizhou 318000
- P. R. China
| | - Zhiming Wang
- Institute of Medicinal Natural Products
- School of Advanced Study
- Taizhou University
- Taizhou 318000
- P. R. China
| | - Hanfeng Ding
- Institute of Medicinal Natural Products
- School of Advanced Study
- Taizhou University
- Taizhou 318000
- P. R. China
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17
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Du JY, Ma YH, Meng FX, Chen BL, Zhang SL, Li QL, Gong SW, Wang DQ, Ma CL. Lewis Acid Catalyzed Tandem 1,4-Conjugate Addition/Cyclization of in Situ Generated Alkynyl o-Quinone Methides and Electron-Rich Phenols: Synthesis of Dioxabicyclo[3.3.1]nonane Skeletons. Org Lett 2018; 20:4371-4374. [DOI: 10.1021/acs.orglett.8b01862] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ji-Yuan Du
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yan-Hua Ma
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Fan-Xiao Meng
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Bao-Li Chen
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Shao-Liang Zhang
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Qian-Li Li
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Shu-Wen Gong
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Da-Qi Wang
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Chun-Lin Ma
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
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18
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He C, Bai Z, Hu J, Wang B, Xie H, Yu L, Ding H. A divergent [5+2] cascade approach to bicyclo[3.2.1]octanes: facile synthesis of ent-kaurene and cedrene-type skeletons. Chem Commun (Camb) 2018; 53:8435-8438. [PMID: 28702539 DOI: 10.1039/c7cc04292b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A solvent-dependent oxidative dearomatization-induced divergent [5+2] cascade approach to bicyclo[3.2.1]octanes was described. This novel protocol enables a facile synthesis of a series of diversely functionalized ent-kaurene and cedrene-type skeletons in good yields and excellent diastereoselectivities.
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Affiliation(s)
- Chi He
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Zengbing Bai
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
| | - Jialei Hu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Bingnan Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
| | - Hujun Xie
- Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310018, China.
| | - Lei Yu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
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19
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Peter C, Geoffroy P, Miesch M. Intramolecular Morita-Baylis-Hillman reaction as a strategy for the construction of tricyclic sesquiterpene cores. Org Biomol Chem 2018; 16:1381-1389. [PMID: 29411822 DOI: 10.1039/c7ob03124f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Starting from a common polyfunctionalized bicyclo[3.2.1]octane-6,8-dione intermediate, a concise synthetic route to tricyclic cores found in quadrane, suberosane, cedrane and related sesquiterpenes was developed using a Morita-Baylis-Hillman intramolecular reaction as a key step.
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Affiliation(s)
- Clovis Peter
- Université de Strasbourg, Institut de Chimie, UMR CNRS/UdS 7177, 4 rue Blaise Pascal, CS 90032, 67081 Strasbourg-Cedex, France.
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20
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Affiliation(s)
- Shu-An Liu
- Department
of Chemistry and Center for Integrated Protein Science, Ludwig-Maximilian University Munich, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dirk Trauner
- Department
of Chemistry and Center for Integrated Protein Science, Ludwig-Maximilian University Munich, Butenandtstraße 5-13, 81377 Munich, Germany
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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21
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He C, Hu J, Wu Y, Ding H. Total Syntheses of Highly Oxidized ent-Kaurenoids Pharicin A, Pharicinin B, 7-O-Acetylpseurata C, and Pseurata C: A [5+2] Cascade Approach. J Am Chem Soc 2017; 139:6098-6101. [DOI: 10.1021/jacs.7b02746] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Chi He
- Department
of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Jialei Hu
- Department
of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Yubing Wu
- Department
of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Ding
- Department
of Chemistry, Zhejiang University, Hangzhou 310058, China
- State
Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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22
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Huang JR, Sohail M, Taniguchi T, Monde K, Tanaka F. Formal (4+1) Cycloaddition and Enantioselective Michael-Henry Cascade Reactions To Synthesize Spiro[4,5]decanes and Spirooxindole Polycycles. Angew Chem Int Ed Engl 2017; 56:5853-5857. [DOI: 10.1002/anie.201701049] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Ji-Rong Huang
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
| | - Muhammad Sohail
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science; Faculty of Advanced Life Science; Hokkaido University; Kita 21 Nishi 11 Sapporo 001-0021 Japan
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science; Faculty of Advanced Life Science; Hokkaido University; Kita 21 Nishi 11 Sapporo 001-0021 Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
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23
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Huang JR, Sohail M, Taniguchi T, Monde K, Tanaka F. Formal (4+1) Cycloaddition and Enantioselective Michael-Henry Cascade Reactions To Synthesize Spiro[4,5]decanes and Spirooxindole Polycycles. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ji-Rong Huang
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
| | - Muhammad Sohail
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science; Faculty of Advanced Life Science; Hokkaido University; Kita 21 Nishi 11 Sapporo 001-0021 Japan
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science; Faculty of Advanced Life Science; Hokkaido University; Kita 21 Nishi 11 Sapporo 001-0021 Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha, Onna Okinawa 904-0495 Japan
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24
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Perez-Hernandez N, Gordillo-Roman B, Arrieta-Baez D, Cerda-Garcia-Rojas CM, Joseph-Nathan P. Complete 1 H NMR assignment of cedranolides. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:169-176. [PMID: 26132551 DOI: 10.1002/mrc.4246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/03/2015] [Accepted: 03/17/2015] [Indexed: 06/04/2023]
Abstract
Complete and unambiguous 1 H NMR chemical shift assignment of α-cedrene (2) and cedrol (9), as well as for α-pipitzol (1), isocedrol (10), and the six related compounds 3-8 has been established by iterative full spin analysis using the PERCH NMR software (PERCH Solutions Ltd., Kuopio, Finland). The total sets of coupling constants are described and correlated with the conformational equilibria of the five-membered ring of 1-10, which were calculated using the complete basis set method. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Nury Perez-Hernandez
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Guillermo Massieu Helguera 239, México, D. F., 07320, Mexico
| | - Barbara Gordillo-Roman
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
| | - Daniel Arrieta-Baez
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, México, D. F., 07738, Mexico
| | - Carlos M Cerda-Garcia-Rojas
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
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25
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Shen D, Chen Q, Yan P, Zeng X, Zhong G. Enantioselective Dearomatization of Naphthol Derivatives with Allylic Alcohols by Cooperative Iridium and Brønsted Acid Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609693] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dan Shen
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Qiliang Chen
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Peipei Yan
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Xiaofei Zeng
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
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26
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Shen D, Chen Q, Yan P, Zeng X, Zhong G. Enantioselective Dearomatization of Naphthol Derivatives with Allylic Alcohols by Cooperative Iridium and Brønsted Acid Catalysis. Angew Chem Int Ed Engl 2017; 56:3242-3246. [DOI: 10.1002/anie.201609693] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 01/12/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Dan Shen
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Qiliang Chen
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Peipei Yan
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Xiaofei Zeng
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou 310036 China
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27
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Pathipati SR, Eriksson L, Selander N. Stereoselective synthesis of bicyclo[3.n.1]alkenone frameworks by Lewis acid-catalysis. Chem Commun (Camb) 2017; 53:11353-11356. [DOI: 10.1039/c7cc06400d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An indium-catalysed α,α′-annulation of cyclic ketones and alkynyl enones, leading to bicyclo[3.n.1]alkenones, is presented.
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Affiliation(s)
- Stalin R. Pathipati
- Department of Organic Chemistry
- Stockholm University
- Arrhenius Laboratory
- Stockholm
- Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry
- Stockholm University
- Arrhenius Laboratory
- Stockholm
- Sweden
| | - Nicklas Selander
- Department of Organic Chemistry
- Stockholm University
- Arrhenius Laboratory
- Stockholm
- Sweden
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28
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Clarke AK, Liddon JTR, Cuthbertson JD, Taylor RJK, Unsworth WP. Dearomatisation approaches to spirocyclic dienones via the electrophilic activation of alkynes. Org Biomol Chem 2017; 15:233-245. [DOI: 10.1039/c6ob02426b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Two simple metal-mediated dearomatising spirocyclisation protocols to generate spirocyclic dienones from anisole and phenol-tethered ynones in high yields are described.
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29
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Kärkäs M, Porco JA, Stephenson CRJ. Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis. Chem Rev 2016; 116:9683-747. [PMID: 27120289 PMCID: PMC5025835 DOI: 10.1021/acs.chemrev.5b00760] [Citation(s) in RCA: 665] [Impact Index Per Article: 83.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Indexed: 01/29/2023]
Abstract
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transformations is the involvement of electronically excited states, generated upon absorption of photons. This produces transient reactive intermediates and significantly alters the reactivity of a chemical compound. The input of energy provided by light thus offers a means to produce strained and unique target compounds that cannot be assembled using thermal protocols. This review aims at highlighting photochemical transformations as a tool for rapidly accessing structurally and stereochemically diverse scaffolds. Synthetic designs based on photochemical transformations have the potential to afford complex polycyclic carbon skeletons with impressive efficiency, which are of high value in total synthesis.
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Affiliation(s)
- Markus
D. Kärkäs
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - John A. Porco
- Department
of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Corey R. J. Stephenson
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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30
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Wang L, Yang D, Li D, Wang P, Wang K, Wang J, Jiang X, Wang R. MgII-Mediated Catalytic Asymmetric Dearomatization (CADA) Reaction of β-Naphthols with Dialkyl Acetylenedicarboxylates. Chemistry 2016; 22:8483-7. [DOI: 10.1002/chem.201601399] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Pengxin Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Kezhou Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Jie Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Xianxing Jiang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 P. R. China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
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31
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Sarkar D, Ghosh MK, Rout N, Giri S. PhSeBr mediated hydroxylative oxidative dearomatization of naphthols – an open air facile one-pot synthesis of ketols. RSC Adv 2016. [DOI: 10.1039/c6ra00036c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
A facile open air methodology for oxidative dearomatisation of planar naphthols is described.
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Affiliation(s)
- Debayan Sarkar
- Organic Synthesis and Molecular Engineering Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India-769008
| | - Manoj Kumar Ghosh
- Organic Synthesis and Molecular Engineering Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India-769008
| | - Nilendri Rout
- Organic Synthesis and Molecular Engineering Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India-769008
| | - Santanab Giri
- Theoretical Chemistry Laboratory
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India-769008
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32
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Yang H, Liu X, Li Q, Li L, Zhang JR, Tang Y. Total synthesis and preliminary SAR study of (±)-merochlorins A and B. Org Biomol Chem 2016; 14:198-205. [DOI: 10.1039/c5ob01946j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A modular synthesis of merochlorins A and B, two naturally occurring antibiotics, has been achieved from the readily available building blocks in a highly concise manner.
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Affiliation(s)
- Hongzhi Yang
- The Comprehensive AIDS Research Center
- and Department of Pharmacology & Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
| | - Xue Liu
- Department of Basic Medical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
- China
| | - Qingong Li
- The Comprehensive AIDS Research Center
- and Department of Pharmacology & Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
| | - Longbo Li
- The Comprehensive AIDS Research Center
- and Department of Pharmacology & Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
| | - Jing-Ren Zhang
- Department of Basic Medical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
- China
| | - Yefeng Tang
- The Comprehensive AIDS Research Center
- and Department of Pharmacology & Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
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33
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Shao J, Li L, Zhang J, Hu J, Xue J, Li Y. Alkynylation/dearomatizative cyclization to construct spiro[5.5]undecanes. RSC Adv 2016. [DOI: 10.1039/c6ra02463g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A one-pot process to construct spiro[5.5]undecanes.
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Affiliation(s)
- Jidong Shao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Liqi Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Jie Zhang
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an
- P. R. China
| | - Jingping Hu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Jijun Xue
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Ying Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
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34
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Yue Y, Novianti ML, Tessensohn ME, Hirao H, Webster RD. Optimizing the lifetimes of phenoxonium cations derived from vitamin E via structural modifications. Org Biomol Chem 2015; 13:11732-9. [PMID: 26480893 DOI: 10.1039/c5ob01868d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systematic synthesis of a number of new phenolic compounds with structures similar to vitamin E led to the identification of several sterically hindered compounds that when electrochemically oxidised in acetonitrile in a -2e(-)/-H(+) process formed phenoxonium diamagnetic cations that were resistant to hydrolysis reactions. The reactivity of the phenoxonium ions was ascertained by performing cyclic voltammetric scans during the addition of carefully controlled quantities of water into acetonitrile solutions, with the data modelled using digital simulation techniques.
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Affiliation(s)
- Yanni Yue
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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35
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Barbato KS, Luan Y, Ramella D, Panek JS, Schaus SE. Enantioselective Multicomponent Condensation Reactions of Phenols, Aldehydes, and Boronates Catalyzed by Chiral Biphenols. Org Lett 2015; 17:5812-5. [PMID: 26576776 PMCID: PMC4671505 DOI: 10.1021/acs.orglett.5b02954] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chiral diols and biphenols catalyze the multicomponent condensation reaction of phenols, aldehydes, and alkenyl or aryl boronates. The condensation products are formed in good yields and enantioselectivities. The reaction proceeds via an initial Friedel-Crafts alkylation of the aldehyde and phenol to yield an ortho-quinone methide that undergoes an enantioselective boronate addition. A cyclization pathway was discovered while exploring the scope of the reaction that provides access to chiral 2,4-diaryl chroman products, the core of which is a structural motif found in natural products.
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Affiliation(s)
- Keith S Barbato
- Center for Molecular Discovery, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - Yi Luan
- Center for Molecular Discovery, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - Daniele Ramella
- Center for Molecular Discovery, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - James S Panek
- Center for Molecular Discovery, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
| | - Scott E Schaus
- Center for Molecular Discovery, Boston University , 24 Cummington Mall, Boston, Massachusetts 02215, United States
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36
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Yang D, Wang L, Kai M, Li D, Yao X, Wang R. Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols. Angew Chem Int Ed Engl 2015; 54:9523-7. [DOI: 10.1002/anie.201503056] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/03/2015] [Indexed: 12/19/2022]
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37
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Yang D, Wang L, Kai M, Li D, Yao X, Wang R. Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503056] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Zhou M, Zhou Y, Song Q. Cu/Fe-Cocatalyzed Formation of β-Ketophosphonates by a Domino Knoevenagel-Decarboxylation-Oxyphosphorylation Sequence from Aromatic Aldehydes and H-Phosphonates. Chemistry 2015; 21:10654-9. [DOI: 10.1002/chem.201501226] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Indexed: 12/16/2022]
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39
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Yang D, Wang L, Han F, Li D, Zhao D, Wang R. Intermolecular Enantioselective Dearomatization Reaction of β-Naphthol Usingmeso-Aziridine: A Bifunctional In Situ Generated Magnesium Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410257] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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40
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Yang D, Wang L, Han F, Li D, Zhao D, Wang R. Intermolecular Enantioselective Dearomatization Reaction of β-Naphthol Usingmeso-Aziridine: A Bifunctional In Situ Generated Magnesium Catalyst. Angew Chem Int Ed Engl 2015; 54:2185-9. [DOI: 10.1002/anie.201410257] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/11/2014] [Indexed: 12/21/2022]
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41
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Bai WJ, David JG, Feng ZG, Weaver MG, Wu KL, Pettus TRR. The domestication of ortho-quinone methides. Acc Chem Res 2014; 47:3655-64. [PMID: 25469551 PMCID: PMC4270411 DOI: 10.1021/ar500330x] [Citation(s) in RCA: 309] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
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An ortho-quinone methide (o-QM)
is a highly reactive chemical motif harnessed by nature for a variety
of purposes. Given its extraordinary reactivity and biological importance,
it is surprising how few applications within organic synthesis exist.
We speculate that their widespread use has been slowed by the complications
that surround the preparation of their precursors, the harsh generation
methods, and the omission of this stratagem from computer databases
due to its ephemeral nature. About a decade ago, we discovered
a mild anionic triggering procedure
to generate transitory o-QMs at low temperature from
readily available salicylaldehydes, particularly OBoc derivatives.
This novel reaction cascade included both the o-QM
formation and the subsequent consumption reaction. The overall transformation
was initiated by the addition of the organometallic reagent, usually
a Grignard reagent, which resulted in the formation of a benzyloxy
alkoxide. Boc migration from the neighboring phenol produced a magnesium
phenoxide that we supposed underwent β-elimination of the transferred
Boc residue to form an o-QM for immediate further
reactions. Moreover, the cascade proved controllable through careful
manipulation of metallic and temperature levers so that it could be
paused, stopped, or restarted at various intermediates and stages.
This new level of domestication enabled us to deploy o-QMs for the first time in a range of applications including diastereocontrolled
reactions. This sequence ultimately could be performed in either
multipot
or single pot processes. The subsequent reaction of the fleeting o-QM intermediates included the 1,4-conjugate additions
that led to unbranched or branched ortho-alkyl substituted
phenols and Diels–Alder reactions that provided 4-unsubstituted
or 4-substituted benzopyrans and chroman ketals. The latter cycloadducts
were obtained for the first time with outstanding diastereocontrol.
In addition, the steric effects of the newly created stereocenters
in subsequent reactions of chroman ketals and acetals were studied
and proved predictable. Through the use of a chiral auxiliary, Diels–Alder
products were deployed in numerous enantioselective reactions including
several complex natural products syntheses. In this Account, we summarize
our efforts, which we hope have contributed to the synthetic renaissance
for this venerable species.
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Affiliation(s)
- Wen-Ju Bai
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jonathan G. David
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhen-Gao Feng
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Marisa G. Weaver
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Kun-Liang Wu
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Thomas R. R. Pettus
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106, United States
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42
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Meng LH, Li XM, Liu Y, Wang BG. Penicibilaenes A and B, sesquiterpenes with a tricyclo[6.3.1.0(1,5)]dodecane skeleton from the marine isolate of Penicillium bilaiae MA-267. Org Lett 2014; 16:6052-5. [PMID: 25408229 DOI: 10.1021/ol503046u] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Penicibilaenes A (1) and B (2), two sesquiterpenes possessing a tricyclo[6.3.1.0(1,5)]dodecane skeleton, were characterized from Penicillium bilaiae MA-267, a fungus obtained from the rhizospheric soil of the mangrove plant Lumnitzera racemosa. The lack of some key COSY and NOESY correlations made the structure elucidation of compound 1 difficult, which was solved by a X-ray crystallographic study. Compounds 1 and 2 exhibited selective activity against the plant pathogenic fungus Colletotrichum gloeosporioides (MIC = 1.0 and 0.125 μg/mL, respectively).
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Affiliation(s)
- Ling-Hong Meng
- †Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China.,‡University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China
| | - Xiao-Ming Li
- †Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China
| | - Yang Liu
- †Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China.,‡University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China
| | - Bin-Gui Wang
- †Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China
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43
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Jansone-Popova S, Le PQ, May JA. Carbene cascades for the formation of bridged polycyclic rings. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.060] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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Sesquiterpene acids from Shellac and their bioactivities evaluation. Fitoterapia 2014; 97:64-70. [PMID: 24879899 DOI: 10.1016/j.fitote.2014.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 05/20/2014] [Accepted: 05/21/2014] [Indexed: 11/21/2022]
Abstract
Seven sesquiterpenes, including four α-cedrene types (Shellolic acid A-C, Laccishellolic acid), two R-curcumene types (Shellolic acid D-E) and Shellolic acid F were isolated from Shellac, of which six were unknown. Their structures were elucidated by HR-ESI-MS, UV, IR, 1D and 2D NMR methods. The absolute configurations were confirmed via the Mosher's method, circular dichroism (CD) and optical rotation analyses. A plausible biogenetic relationship for 1-6 is proposed. Cytotoxic and anti-bacterial activities of the isolates were evaluated. To the best of our knowledge, none compounds showed any cytotoxic activity, which is well consistent with that Shellac used as nontoxic material in pharmaceutical formulations and food additives. However, compound 1 exhibited inhibitory activity against Bacillus subtilis with the MIC value of 0.1 mg/mL.
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45
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Abstract
A short total synthesis, guided by biosynthetic considerations, of racemic merochlorin B is presented. The formation of its isomer, merochlorin A, was not observed under the conditions. Key steps include a directed ortho-metalation (DoM), a selective demethylation, an ortho-allylation, and an oxidative [3 + 2]-cycloaddition mediated by an iodine(III) reagent.
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Affiliation(s)
- Robin Meier
- Department of Chemistry and Center for Integrated Protein Science, University of Munich (LMU) , Butenandtstraße 5-13, 81377 München, Germany
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46
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Weaver MG, Bai WJ, Jackson SK, Pettus TRR. Diels-Alder construction of regiodifferentiated meta-amino phenols and derivatives. Org Lett 2014; 16:1294-7. [PMID: 24524325 PMCID: PMC3993616 DOI: 10.1021/ol4034447] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic access to regiodifferentiated meta-amino phenols is described. The strategy relies upon distinct deprotonation conditions to afford regioisomeric thermodynamic and kinetic dienes that undergo a tandem Diels-Alder and retro-Diels-Alder sequence with assorted acetylenic dienophiles to afford a range of aromatic products.
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Affiliation(s)
- Marisa G Weaver
- Department of Chemistry and Biochemistry, University of California , Santa Barbara, California 93106-9510, United States
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47
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Qian H. Thiolate-protected Au38(SR)24 nanocluster: size-focusing synthesis, structure determination, intrinsic chirality, and beyond. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2014-5011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Abstract
Thiolate-protected Au nanoclusters with core diameters smaller than 2 nm have captured considerable attention in recent years due to their diverse applications ranging from biological labeling to photovoltaics and catalysis. This new class of nanomaterials exhibits discrete electronic structure and molecular-like properties, such as HOMO-LUMO electronic transition, intrinsic magnetism, chiroptical properties, and enhanced catalytic properties. This review focuses on the research into thiolate-protected Au38(SR)24 – one of the most representative nanoclusters, including its identification, size-focusing synthesis, structure determination, and intrinsic chirality. The properties of two size-adjacent Au nanoclusters [Au40(SR)24 and Au36(SR)24] are also discussed. The experimental and theoretical methodologies developed in studies of the Au38(SR)24 model nanocluster open up new opportunities in the synthesis and properties investigation of other atomically precise Aun(SR)m nanoclusters.
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48
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Singh MS, Nagaraju A, Anand N, Chowdhury S. ortho-Quinone methide (o-QM): a highly reactive, ephemeral and versatile intermediate in organic synthesis. RSC Adv 2014. [DOI: 10.1039/c4ra11444b] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In this critical review, we provide a comprehensive view of the chemistry of ortho-quinone methides as versatile reactive intermediates in organic synthesis.
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Affiliation(s)
- Maya Shankar Singh
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Anugula Nagaraju
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Namrata Anand
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
| | - Sushobhan Chowdhury
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi 221 005, India
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49
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Jeong HU, Kwon SS, Kong TY, Kim JH, Lee HS. Inhibitory effects of cedrol, β-cedrene, and thujopsene on cytochrome P450 enzyme activities in human liver microsomes. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2014; 77:1522-1532. [PMID: 25343299 DOI: 10.1080/15287394.2014.955906] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cedrol, β-cedrene, and thujopsene are bioactive sesquiterpenes found in cedar essential oil and exert antiseptic, anti-inflammatory, antispasmodic, tonic, astringent, diuretic, sedative, insecticidal, and antifungal activities. These compounds are used globally in traditional medicine and cosmetics. The aim of this study was to investigate the inhibitory effects of cedrol, β-cedrene, and thujopsene on the activities of eight major human cytochrome P-450 (CYP) enzymes using human liver microsomes to assess potential β-cedrene-, cedrol-, and thujopsene-drug interactions. Cedrol, β-cedrene, and thujopsene were found to be potent competitive inhibitors of CYP2B6-mediated bupropion hydroxylase with inhibition constant (Ki) values of 0.9, 1.6, and 0.8 μM, respectively, comparable with that of a selective CYP2B6 inhibitor, thioTEPA (Ki, 2.9 μM). Cedrol also markedly inhibited CYP3A4-mediated midazolam hydroxylation with a Ki value of 3.4 μM, whereas β-cedrene and thujopsene moderately blocked CYP3A4. Cedrol, β-cedrene, and thujopsene at 100 μM negligibly inhibited CYP1A2, CYP2A6, and CYP2D6 activities. Only thujopsene was found to be a mechanism-based inhibitor of CYP2C8, CYP2C9, and CYP2C19. Cedrol and thujopsene weakly inhibited CYP2C8, CYP2C9, and CYP2C19 activities, but β-cedrene did not. These in vitro results indicate that cedrol, β-cedrene, and thujopsene need to be examined for potential pharmacokinetic drug interactions in vivo due to their potent inhibition of CYP2B6 and CYP3A4.
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Affiliation(s)
- Hyeon-Uk Jeong
- a Drug Metabolism & Bioanalysis Laboratory, College of Pharmacy , The Catholic University of Korea , Bucheon , Korea
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50
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Oguma T, Katsuki T. Iron-catalysed asymmetric tandem spiro-cyclization using dioxygen in air as the hydrogen acceptor. Chem Commun (Camb) 2014; 50:5053-6. [DOI: 10.1039/c4cc01555j] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A tandem combination of ortho-quinone methide (o-QM) formation/Michael addition/asymmetric dearomatization, which is catalysed by an iron–salan complex in air with high enantioselectivity, provides an efficient method for spirocyclic (2H)-dihydrobenzofuran synthesis from 2-naphthols and phenols.
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Affiliation(s)
- Takuya Oguma
- Department of Chemistry
- Graduate School of Science
- Kyushu University
- Fukuoka 812-8581, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
| | - Tsutomu Katsuki
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
- Kyushu University
- Fukuoka 812-8581, Japan
- Institute for Advanced Study
- Kyushu University
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