1
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Zhang YP, Du S, Ma Y, Zhan W, Chen W, Yang X, Zhang H. Structure-Unit-Based Total Synthesis of (-)-Sinulochmodin C. Angew Chem Int Ed Engl 2024; 63:e202315481. [PMID: 38009457 DOI: 10.1002/anie.202315481] [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: 10/21/2023] [Revised: 11/21/2023] [Accepted: 11/24/2023] [Indexed: 11/28/2023]
Abstract
Herein we report a structure-unit-based asymmetric total synthesis of sinulochmodin C, a norcembranoid diterpenoid bearing a transannular strained ether bridge β-keto tetrahydrofuran moiety. Our synthetic route features an intramolecular double Michael addition to construct stereospecifically the [7,6,5,5] tetracyclic skeleton, a vinylogous hydroxylation/oxidation procedure or a stereospecific epoxide opening/oxidation sequence to establish the γ-keto enone intermediate, a Lewis acid/Brønsted acid mediated transannular oxa-Michael addition to fuse the β-keto tetrahydrofuran moiety, a Mukaiyama hydration/Pd-C hydrogenation to reverse the C1-configuration of the isopropenyl unit, and a bioinspired transformation of sinulochmodin C into scabrolide A.
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Affiliation(s)
- Yi-Peng Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Shufei Du
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Ying Ma
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Weixin Zhan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research and Development of Natural Products, Yunnan Characteristic Plant Extraction Laboratory, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
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2
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Huang J, Cao T, Zhang Z, Yang Z. Semisynthesis of (-)-Bufospirostenin A Enabled by Photosantonin Rearrangement Reaction. J Am Chem Soc 2022; 144:2479-2483. [PMID: 35112846 DOI: 10.1021/jacs.1c12395] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An enantioselective semisynthesis of (-)-bufospirostenin A is described. The key steps in the synthesis involve use of our proposed biomimetic and diastereoselective photosantonin rearrangement reaction for construction of the 5/7 bicyclic motif, and a Co-catalyzed reversible double-bond isomerization reaction for installing the double bond in the seven-membered ring.
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Affiliation(s)
- Jun Huang
- State Key Laboratory of Chemical Oncogenomics and Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Tingting Cao
- State Key Laboratory of Chemical Oncogenomics and Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Zhongchao Zhang
- State Key Laboratory of Chemical Oncogenomics and Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics and Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, 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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3
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Wicks C, Hudlicky T, Rinner U. Morphine alkaloids: History, biology, and synthesis. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2021; 86:145-342. [PMID: 34565506 DOI: 10.1016/bs.alkal.2021.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This chapter provides a short overview of the history of morphine since it's isolation by Sertürner in 1805. The biosynthesis of the title alkaloid as well as all total and formal syntheses of morphine and codeine published after 1996 are discussed in detail. The last section of this chapter provides a detailed overview of medicinally relevant derivatives of the title alkaloid.
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Affiliation(s)
- Christopher Wicks
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON, Canada
| | - Tomas Hudlicky
- Department of Chemistry and Centre for Biotechnology, Brock University, St. Catharines, ON, Canada
| | - Uwe Rinner
- IMC Fachhochschule Krems/IMC University of Applied Sciences Krems, Krems, Austria.
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4
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Li X, Zhang Z, Fan H, Miao Y, Tian H, Gu Y, Gui J. Concise Synthesis of 9,11-Secosteroids Pinnigorgiols B and E. J Am Chem Soc 2021; 143:4886-4890. [PMID: 33761241 DOI: 10.1021/jacs.0c13426] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Pinnigorgiols B and E are 9,11-secosteroids with a unique tricyclic γ-diketone framework. Herein, we report the first synthesis of these natural products from inexpensive, commercially available ergosterol. This synthesis features a semipinacol rearrangement and an acyl radical cyclization/hemiketalization cascade; the latter efficiently assembled the tricyclic γ-diketone skeleton, with two rings and three contiguous stereogenic centers being formed in a single step.
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Affiliation(s)
- Xinghui Li
- 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
| | - Zeliang Zhang
- 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
| | - Huafang Fan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Yinlong Miao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hailong Tian
- 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
| | - Yucheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - 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
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5
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Indu S, Kaliappan KP. Synthetic approaches towards cortistatins: evolution and progress through its ages. Org Biomol Chem 2020; 18:3965-3995. [PMID: 32420567 DOI: 10.1039/d0ob00770f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cortistatins are a family of steroidal alkaloids with a unique pentacyclic skeleton, having immensely potent anti-angiogenetic activities. Given the scarcity in the natural availability of these compounds, their syntheses became major attractions in organic chemistry. Along with total synthesis of the most potent congeners in the family: cortistatins A and J, the synthesis of two other members have been successfully completed, while various other analogues have also been designed with variable degrees of biological activities. This review is an exhaustive coverage of the significant attempts towards constructing this highly challenging molecule and also aims to highlight the deep understanding of the structure-activity relationships of these compounds, which have been garnered over time.
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Affiliation(s)
- Satrajit Indu
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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6
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Cai W, Huang S, Wu J, Song Z, Xin Z, Li J, Xue X. Synthesis of ent-Cleistanthane Diterpenoid Spruceanol: Construction of an Aromatic C Ring via Lewis Acid-Controlled Regioselective Diels-Alder Cycloaddition. J Org Chem 2020; 85:6709-6718. [PMID: 32340453 DOI: 10.1021/acs.joc.0c00713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first synthesis of ent-cleistanthane-type diterpenoid spruceanol with significant anticancer activity is described. A chiral pool approach was employed with a linear sequence of 13 steps beginning from readily available and inexpensive andrographolide. The approach features the construction of an aromatic ring with hydroxyl and methyl groups at C-12 and C-13 of the target compound, respectively, via Lewis acid-controlled regioselective Diels-Alder cycloaddition and the regioselective removal of the primary hydroxyl group of the Diels-Alder adduct.
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Affiliation(s)
- Wei Cai
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Sujie Huang
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jiajia Wu
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Zhiqiang Song
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Zhengyuan Xin
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Jiabin Li
- School of Science, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaowen Xue
- Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
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7
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Indu S, Telore RD, Kaliappan KP. Construction of key building blocks towards the synthesis of cortistatins. Org Biomol Chem 2020; 18:2432-2446. [PMID: 32163085 DOI: 10.1039/d0ob00170h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This work reports the construction of key building blocks towards the synthesis of cortistatins; a family of steroidal alkaloids. Cortistatin A, being a primary target due to its superior biological properties over other congeners, has been prepared by two different synthetic routes. Synthesis of the precursor to the heavily substituted A-ring starting from d-glucose and construction of the DE-ring junction employing a Hajos-Parrish ketone as a chiral pool have been demonstrated. Efforts are underway to assemble these key fragments and build towards the total synthesis of cortistatin A.
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Affiliation(s)
- Satrajit Indu
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Rahul D Telore
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Krishna P Kaliappan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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8
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Wang Y, Ju W, Tian H, Sun S, Li X, Tian W, Gui J. Facile Access to Bridged Ring Systems via Point-to-Planar Chirality Transfer: Unified Synthesis of Ten Cyclocitrinols. J Am Chem Soc 2019; 141:5021-5033. [PMID: 30827095 DOI: 10.1021/jacs.9b00925] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bridged ring systems are found in a wide variety of biologically active molecules including pharmaceuticals and natural products. However, the development of practical methods to access such systems with precise control of the planar chirality presents considerable challenges to synthetic chemists. In the context of our work on the synthesis of cyclocitrinols, a family of steroidal natural products, we herein report the development of a point-to-planar chirality transfer strategy for preparing bridged ring systems from readily accessible fused ring systems. Inspired by the proposed pathway for biosynthesis of cyclocitrinols from ergosterol, our strategy involves a bioinspired cascade rearrangement, which enabled the gram-scale synthesis of a common intermediate in nine steps and subsequent unified synthesis of 10 cyclocitrinols in an additional one to three steps. Our work provides experimental support for the proposed biosynthetic pathway and for the possible interrelationships between members of the cyclocitrinol family. In addition to being a convenient route to 5(10→19) abeo-steroids, our strategy also offers a generalized approach to bridged ring systems via point-to-planar chirality transfer. Mechanistic investigations suggest that the key cascade rearrangement involves a regioselective ring scission of a cyclopropylcarbinyl cation rather than a direct Wagner-Meerwein rearrangement.
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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
| | - Wei Ju
- 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
| | - Hailong Tian
- 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
| | - Suyun Sun
- 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
| | - Xinghui Li
- 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
| | - Weisheng Tian
- 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
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9
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Bao W, Tao Y, Cheng J, Huang J, Cao J, Zhang M, Ye W, Wang B, Li Y, Zhu L, Lee CS. In(OTf) 3-Catalyzed Cascade Cyclization for Construction of Oxatricyclic Compounds. Org Lett 2018; 20:7912-7915. [PMID: 30543298 DOI: 10.1021/acs.orglett.8b03461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A highly diastereoselective cascade cyclization reaction has been developed for establishing a series of oxatricyclic compounds using Chan's diene and simple keto alkynal substrates with only 1 mol % of In(OTf)3 as the catalyst in 82-92% yields. The potential utility of this synthetic strategy has been demonstrated in model studies for the construction the core structures of 1α,8α:4α,5α-diepoxy-4,5-dihydroosmitopsin and cortistatin A.
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Affiliation(s)
- Wenli Bao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Yezi Tao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Jiangqun Cheng
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Junrong Huang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Jingming Cao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Mengxun Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Weijian Ye
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Bo Wang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Yang Li
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China
| | - Lizhi Zhu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Institute of Translational Medicine, Shenzhen Second People's Hospital , The First Affiliated Hospital of Shenzhen University, Health Science Center , Shenzhen 518035 , China
| | - Chi-Sing Lee
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen University Town, Xili, Shenzhen 518055 , China.,Institute of Research and Continuing Edition (Shenzhen) , Hong Kong Baptist University , Industrialization Complex Building, Shenzhen Virtual University Park, Shenzhen 518000 , China.,Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong SAR
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10
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Hu YJ, Fan JH, Li S, Zhao J, Li CC. Synthetic Study toward the Total Synthesis of Taxezopidines A and B. Org Lett 2018; 20:5905-5909. [PMID: 30192554 DOI: 10.1021/acs.orglett.8b02571] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise synthetic approach to construct the [6,8,6]-tricyclic core of taxezopidines A and B, which contains a synthetically challenging bridged bicyclo[5.3.1]undecane ring system bearing most of the desired functionalized groups and stereocenters, has been established. This approach features a diastereoselective type II intramolecular Diels-Alder furan reaction. The stereochemistry of the acetoxy group at the allylic position of the dienophile alkene group, such as in 6a, was found to be critical for achieving the desired highly diastereoselective outcome.
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Affiliation(s)
- Ya-Jian Hu
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China.,Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Jian-Hong Fan
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China.,Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Shaoping Li
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China
| | - Jing Zhao
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China
| | - Chuang-Chuang Li
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
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11
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Lu Z, Zhang X, Guo Z, Chen Y, Mu T, Li A. Total Synthesis of Aplysiasecosterol A. J Am Chem Soc 2018; 140:9211-9218. [PMID: 29939021 DOI: 10.1021/jacs.8b05070] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Aplysiasecosterol A (1) is a structurally unusual 9,11-secosteroid isolated from the sea hare Aplysia kurodai. We have accomplished the first and asymmetric total synthesis of 1 in a convergent fashion. The left-hand segment bearing three adjacent stereocenters was constructed through desymmetrizing reduction, ketalization, and radical cyclization. A strategy of asymmetric 2-bromoallylation followed by spontaneous desymmetrizing lactolization enabled a more expeditious access to this segment. The right-hand segment was prepared through two different approaches: one featuring Myers alkylation and Suzuki-Miyaura coupling and the other relying upon Aggarwal lithiation-borylation and Zweifel-Evans olefination. The two fragments were coupled by a Reformatsky type reaction. The three consecutive stereocenters embedded in the central domain of 1 were generated by an iron-mediated, hydrogen atom transfer based radical cyclization reaction.
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Affiliation(s)
- Zhaohong Lu
- 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
| | - Zhicong Guo
- 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
| | - Yu Chen
- 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
| | - Tong Mu
- 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
| | - 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
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12
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Hashimoto T, Shimazaki Y, Omatsu Y, Maruoka K. Indanol-Based Chiral Organoiodine Catalysts for Enantioselective Hydrative Dearomatization. Angew Chem Int Ed Engl 2018; 57:7200-7204. [PMID: 29700910 DOI: 10.1002/anie.201803889] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 04/26/2018] [Indexed: 01/09/2023]
Abstract
Rapid development in the last decade has rendered chiral organoiodine(I/III) catalysis a reliable methodology in asymmetric catalysis. However, due to the severely limited numbers of effective organoiodine catalysts, many reactions still give low to modest enantioselectivity. We report herein a solution to this issue through the introduction of a pivotal indanol scaffold to the catalyst design. Our catalyst architecture exhibits the advantage of high modularity and thereby expedites catalyst optimization. The catalyst was optimized for the challenging and highly sought-after hydrative dearomatization of 2-substituted phenols at the 4-position.
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Affiliation(s)
- Takuya Hashimoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.,Department of Chemistry, Graduate School of Science, Chiba University, 1-33, Yayoi, Inage, Chiba, 263-8522, Japan.,Chiba Iodine Resource Innovation Center, 1-33, Yayoi, Inage, Chiba, 263-8522, Japan
| | - Yuto Shimazaki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Yamato Omatsu
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Panyu District, Guangzhou, 510006, China
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13
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Hashimoto T, Shimazaki Y, Omatsu Y, Maruoka K. Indanol-Based Chiral Organoiodine Catalysts for Enantioselective Hydrative Dearomatization. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803889] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Takuya Hashimoto
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
- Department of Chemistry; Graduate School of Science; Chiba University; 1-33, Yayoi, Inage Chiba 263-8522 Japan
- Chiba Iodine Resource Innovation Center; 1-33, Yayoi, Inage Chiba 263-8522 Japan
| | - Yuto Shimazaki
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Yamato Omatsu
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
- School of Chemical Engineering and Light Industry; Guangdong University of Technology; Panyu District Guangzhou 510006 China
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14
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Bartels F, Hong YJ, Ueda D, Weber M, Sato T, Tantillo DJ, Christmann M. Bioinspired synthesis of pentacyclic onocerane triterpenoids. Chem Sci 2017; 8:8285-8290. [PMID: 29619174 PMCID: PMC5858022 DOI: 10.1039/c7sc03903d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 10/14/2017] [Indexed: 01/23/2023] Open
Abstract
The first chemical synthesis of pentacyclic onocerane triterpenoids (+)-cupacinoxepin and (+)-onoceranoxide is described.
The first chemical synthesis of pentacyclic onocerane triterpenoids has been achieved. A putative biomimetic tricyclization cascade is employed to forge a fused decalin-/oxepane ring system. The synthetic route proceeds to (+)-cupacinoxepin in seven steps and to (+)-onoceranoxide in eight steps in the longest linear sequence, when starting from geranyl chloride and (+)-sclareolide. The bioinspired epoxypolyene cyclization is supported by computational and enzymatic studies.
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Affiliation(s)
- Florian Bartels
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany .
| | - Young J Hong
- Department of Chemistry , University of California-Davis , Davis , California 95616 , USA .
| | - Daijiro Ueda
- Department of Applied Biological Chemistry , Graduate School of Science and Technology , Niigata University , Ikarashi 2-8050, Nishi-ku , Niigata 950-2181 , Japan .
| | - Manuela Weber
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany .
| | - Tsutomu Sato
- Department of Applied Biological Chemistry , Graduate School of Science and Technology , Niigata University , Ikarashi 2-8050, Nishi-ku , Niigata 950-2181 , Japan .
| | - Dean J Tantillo
- Department of Chemistry , University of California-Davis , Davis , California 95616 , USA .
| | - Mathias Christmann
- Institute of Chemistry and Biochemistry , Freie Universität Berlin , Takustraße 3 , 14195 Berlin , Germany .
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16
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Aquino C, Greszler SN, Micalizio GC. Synthesis of the Cortistatin Pentacyclic Core by Alkoxide-Directed Metallacycle-Mediated Annulative Cross-Coupling. Org Lett 2016; 18:2624-7. [PMID: 27193994 PMCID: PMC4892975 DOI: 10.1021/acs.orglett.6b01048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The pentacyclic core skeleton of the cortistatins has been prepared in a stereoselective fashion by strategic use of an alkoxide-directed metallacycle-mediated annulative cross-coupling. This metal-centered tandem reaction delivers a polyunsaturated hydrindane and establishes the C13 stereodefined quaternary center with high levels of stereocontrol. Subsequent regio- and stereoselective global hydroboration results in the realization of the DE-trans ring fusion and a tertiary alcohol at C8. Establishment of the ABC-tricyclic subunit was then accomplished through phenolic oxidation/trans-acetalization, chemoselective reduction, regioselective cleavage, and intramolecular alkylation at C5.
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Affiliation(s)
- Claudio Aquino
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458
| | | | - Glenn C. Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL 33458
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17
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Zhang JJ, You L, Wang YF, Li YH, Liang XT, Zhang B, Yang SL, Su Q, Chen JH, Yang Z. Asymmetric Total Synthesis of Propindilactone G, Part 2: Enantioselective Construction of the Fully Functionalized BCDE Ring System. Chem Asian J 2016; 11:1414-24. [DOI: 10.1002/asia.201600130] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Jia-Jun Zhang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Lin You
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Yue-Fan Wang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Yuan-He Li
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Xin-Ting Liang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Bo Zhang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Shou-Liang Yang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Qi Su
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Jia-Hua Chen
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
| | - Zhen Yang
- State Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education; Beijing National Laboratory for Molecular Science (BNLMS); Peking-Tsinghua Center for Life Sciences, and; Department of Chemistry; Peking University; 202 Chengfu Road Beijing 100871 P. R. China
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology, Shenzhen Graduate School; Peking University; Shenzhen 518055 P. R. China
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy; Ocean University of China; 5 Yushan Road Qingdao P. R. China
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18
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Mackay EG, Nörret M, Wong LSM, Louis I, Lawrence AL, Willis AC, Sherburn MS. A Domino Diels–Alder Approach toward the Tetracyclic Nicandrenone Framework. Org Lett 2015; 17:5517-9. [DOI: 10.1021/acs.orglett.5b02412] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emily G. Mackay
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Marck Nörret
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Leon S.-M. Wong
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Ignace Louis
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Andrew L. Lawrence
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Michael S. Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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19
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Towards a general diastereoselective route to oxabicyclo[3.2.1]octanes via a gold-catalysed cascade reaction. Nat Commun 2015; 6:8617. [PMID: 26509323 PMCID: PMC4634332 DOI: 10.1038/ncomms9617] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 09/10/2015] [Indexed: 11/15/2022] Open
Abstract
The development of an efficient diastereoselective synthesis of the oxabicyclo[3.2.1]octane ring system bearing two oxygenated quaternary chiral centres represents a significant challenge. This motif can be found in a wide range of natural products with significant biological activities. Here we report the synthesis of such kind of scaffold using a cyclohexane-trans-1,4-diol with an alkyne side chain in the presence of Au(I) catalyst. This is a domino process in which two C–H, two C–O and one C–C bond is assembled through a sequence of cyclization/semi-pinacol rearrangements. This strategy has been successfully applied to the asymmetric formal total synthesis of (+)-cortistatins. Oxygenated bicyclic cores are common to many natural and bioactive compounds, but their efficient synthesis can be difficult. Here, the authors report a gold-catalysed diastereoselective process for the synthesis of oxabicyclo[3.2.1]octanes via a domino process.
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20
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Kuang L, Liu LL, Chiu P. Formal Total Synthesis of (+)-Cortistatins A and J. Chemistry 2015; 21:14287-91. [DOI: 10.1002/chem.201502890] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Indexed: 11/12/2022]
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21
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Kimishima A, Umihara H, Mizoguchi A, Yokoshima S, Fukuyama T. Synthesis of (−)-Oxycodone. Org Lett 2014; 16:6244-7. [DOI: 10.1021/ol503175n] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Atsushi Kimishima
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hirotatsu Umihara
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Akihiro Mizoguchi
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Satoshi Yokoshima
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tohru Fukuyama
- Graduate
School of Pharmaceutical Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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22
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Heravi MM, Hajiabbasi P. Recent advances in C-heteroatom bond forming by asymmetric Michael addition. Mol Divers 2013; 18:411-39. [DOI: 10.1007/s11030-013-9494-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 12/02/2013] [Indexed: 10/25/2022]
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23
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Gao S, Wang Q, Wang G, Lomenick B, Liu J, Fan CW, Deng LW, Huang J, Lum L, Chen C. The Chemistry and Biology of Nakiterpiosin - C-nor-D-Homosteroids. Synlett 2012; 16:2298-2310. [PMID: 23226922 PMCID: PMC3515072 DOI: 10.1055/s-0031-1290460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Isolated from the sponge Terpios hoshinota that causes coral black disease, nakiterpiosin was the first C-nor-D-homosteroid discovered from a marine source. We provide in this account an overview of the chemistry and biology of this natural product. We also include a short history of the synthesis of C-nor-D-homosteroids and the results of some unpublished biological studies of nakiterpiosin.
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Affiliation(s)
- Shuanhu Gao
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Qiaoling Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Gelin Wang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Brett Lomenick
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA
| | - Jie Liu
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Chih-Wei Fan
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA, Fax +1(214)6480320
| | - Lih-Wen Deng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jing Huang
- Department of Molecular and Medical Pharmacology, University of California, Los Angeles, California 90095, USA
| | - Lawrence Lum
- Department of Cell Biology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA, Fax +1(214)6480320
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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24
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Nicolaou KC, Hale CRH, Nilewski C, Ioannidou HA. Constructing molecular complexity and diversity: total synthesis of natural products of biological and medicinal importance. Chem Soc Rev 2012; 41:5185-238. [PMID: 22743704 PMCID: PMC3426871 DOI: 10.1039/c2cs35116a] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The advent of organic synthesis and the understanding of the molecule as they occurred in the nineteenth century and were refined in the twentieth century constitute two of the most profound scientific developments of all time. These discoveries set in motion a revolution that shaped the landscape of the molecular sciences and changed the world. Organic synthesis played a major role in this revolution through its ability to construct the molecules of the living world and others like them whose primary element is carbon. Although the early beginnings of organic synthesis came about serendipitously, organic chemists quickly recognized its potential and moved decisively to advance and exploit it in myriad ways for the benefit of mankind. Indeed, from the early days of the synthesis of urea and the construction of the first carbon-carbon bond, the art of organic synthesis improved to impressively high levels of sophistication. Through its practice, today chemists can synthesize organic molecules--natural and designed--of all types of structural motifs and for all intents and purposes. The endeavor of constructing natural products--the organic molecules of nature--is justly called both a creative art and an exact science. Often called simply total synthesis, the replication of nature's molecules in the laboratory reflects and symbolizes the state of the art of synthesis in general. In the last few decades a surge in total synthesis endeavors around the world led to a remarkable collection of achievements that covers a wide ranging landscape of molecular complexity and diversity. In this article, we present highlights of some of our contributions in the field of total synthesis of natural products of biological and medicinal importance. For perspective, we also provide a listing of selected examples of additional natural products synthesized in other laboratories around the world over the last few years.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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25
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Defaut B, Parsons TB, Spencer N, Male L, Kariuki BM, Grainger RS. Synthesis of the trans-hydrindane core of dictyoxetane. Org Biomol Chem 2012; 10:4926-32. [DOI: 10.1039/c2ob25384d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Abstract
We describe herein the synthesis of a late-stage intermediate en route to cortistatin A. Key transformations included a Snieckus-like cascade sequence culminating in a 6π-electrocyclization, an alkylative dearomatization, and the stereoselective functionalization of the cortistatin A-ring. While the total synthesis we sought was not accomplished, the work sets the stage for several approaches to the preparation of novel analogs via diverted total synthesis.
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Affiliation(s)
- Zhang Wang
- Department of Chemistry, Columbia University, Havemeyer Hall, 3000 Broadway, New York, NY 10027
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27
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Zhang X, Jia X, Fang L, Liu N, Wang J, Fan X. Tandem Reactions of 1,2-Allenic Ketones Leading to Substituted Benzenes and α,β-Unsaturated Nitriles. Org Lett 2011; 13:5024-7. [PMID: 21877737 DOI: 10.1021/ol201789z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xinying Zhang
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
| | - Xuefei Jia
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
| | - Liangliang Fang
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
| | - Nan Liu
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
| | - Jianji Wang
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
| | - Xuesen Fan
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Henan 453007, P. R. China
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Abstract
A concise, diastereoselective total synthesis of (±)-cortistatin J has been completed in 20 steps from furan. Key steps include an intramolecular [4 + 3] cyclization of a disubstituted furan with a (Z)-2-(trialkylsilyloxy)-2-enal to construct the tetracyclic core and a (Z)-vinylsilane/iminium ion cyclization to form the A ring.
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Affiliation(s)
- Mark G Nilson
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
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29
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Zang Q, Javed S, Ullah F, Zhou A, Knudtson CA, Bi D, Basha FZ, Organ MG, Hanson PR. Application of a Double Aza-Michael Reaction in a 'Click, Click, Cy-Click' Strategy: From Bench to Flow. SYNTHESIS-STUTTGART 2011; 2011:2743-2750. [PMID: 21927510 DOI: 10.1055/s-0030-1260112] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The development of a 'click, click, cy-click' process utilizing a double aza-Michael reaction to generate functionalized 1,2,5-thiadiazepane 1,1-dioxides is reported. Optimization in flow, followed by scale out of the inter-/intramolecular double aza-Michael addition has also been realized using a microwave-assisted, continuous flow organic synthesis platform (MACOS). In addition, a facile one-pot, sequential strategy employing in situ Huisgen cycloaddition post-double aza-Michael has been accomplished, and is applicable to library synthesis.
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Affiliation(s)
- Qin Zang
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, KS 66045-7582 and the Center for Chemical Methodologies and Library Development at the University of Kansas (KU-CMLD), 2034 Becker Drive, Delbert M. Shankel Structural Biology Center, Lawrence, KS 66047-3761, USA
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30
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Kotoku N, Sumii Y, Kobayashi M. Stereoselective synthesis of core structure of cortistatin A. Org Lett 2011; 13:3514-7. [PMID: 21651309 DOI: 10.1021/ol201327u] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereoselective synthesis of the core structure of cortistatin A (1), a novel antiangiogenic steroidal alkaloid from Indonesian marine sponge, is described. An 8-oxabicyclo[3.2.1]octene system, a characteristic B-ring structure of 1, was elaborated by a 7-endo selective intramolecular Heck cyclization and a subsequent acid-mediated oxy-Michael reaction.
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Affiliation(s)
- Naoyuki Kotoku
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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Shi J, Manolikakes G, Yeh CH, Guerrero CA, Shenvi RA, Shigehisa H, Baran PS. Scalable synthesis of cortistatin A and related structures. J Am Chem Soc 2011; 133:8014-27. [PMID: 21539314 DOI: 10.1021/ja202103e] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Full details are provided for an improved synthesis of cortistatin A and related structures as well as the underlying logic and evolution of strategy. The highly functionalized cortistatin A-ring embedded with a key heteroadamantane was synthesized by a simple and scalable five-step sequence. A chemoselective, tandem geminal dihalogenation of an unactivated methyl group, a reductive fragmentation/trapping/elimination of a bromocyclopropane, and a facile chemoselective etherification reaction afforded the cortistatin A core, dubbed "cortistatinone". A selective Δ(16)-alkene reduction with Raney Ni provided cortistatin A. With this scalable and practical route, copious quantities of cortistatinone, Δ(16)-cortistatin A (the equipotent direct precursor to cortistatin A), and its related analogues were prepared for further biological studies.
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Affiliation(s)
- Jun Shi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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Silva, Jr. LF, Olofsson B. Hypervalent iodine reagents in the total synthesis of natural products. Nat Prod Rep 2011; 28:1722-54. [DOI: 10.1039/c1np00028d] [Citation(s) in RCA: 247] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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