1
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Taizoumbe KA, Steiner ST, Dickschat JS. Mechanistic Characterisation of Collinodiene Synthase, a Diterpene Synthase from Streptomyces collinus. Chemistry 2023; 29:e202302469. [PMID: 37579200 DOI: 10.1002/chem.202302469] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/14/2023] [Accepted: 08/14/2023] [Indexed: 08/16/2023]
Abstract
Two homologs of the diterpene synthase CotB2 from Streptomyces collinus (ScCotB2) and Streptomyces iakyrus (SiCotB2) were investigated for their products by in vitro incubations of the recombinant enzymes with geranylgeranyl pyrophosphate, followed by compound isolation and structure elucidation by NMR. ScCotB2 produced the new compound collinodiene, besides the canonical CotB2 product cyclooctat-9-en-7-ol, dolabella-3,7,18-triene and dolabella-3,7,12-triene, while SiCotB2 gave mainly cyclooctat-9-en-7-ol and only traces of dolabella-3,7,18-triene. The cyclisation mechanism towards the ScCotB2 products and their absolute configurations were investigated through isotopic labelling experiments.
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Affiliation(s)
- Kizerbo A Taizoumbe
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Simon T Steiner
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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2
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Rosales Martínez A, Rodríguez-García I. Marine Puupehenone and Puupehedione: Synthesis and Future Perspectives. Mar Drugs 2023; 21:322. [PMID: 37367647 DOI: 10.3390/md21060322] [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: 05/08/2023] [Revised: 05/21/2023] [Accepted: 05/24/2023] [Indexed: 06/28/2023] Open
Abstract
Puupehenone and puupehedione are natural products isolated from marine organisms. These compounds display a broad spectrum of biological activities, the in vitro antitubercular activity of puupehenone being a stand out, and are equipped with an interesting structural complexity. These products have served to stimulate the continual interest of the synthetic community. The first part of this article is a review of their total synthesis, using natural compounds which have the potential to be transformed into these marine compounds as starting materials; the synthetic routes employed to generate the basic skeleton; and the advances made to synthesize the pyran C ring with the required diastereoselectivity to obtain the natural products. Finally, this perspective shows a personal reflection of the authors on a possible unified and efficient retrosynthetic route that could allow easy access to these natural products, as well as their epimers at the C8 carbon and which could be used to address future biological issues in the production of pharmacologically active compounds.
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Affiliation(s)
- Antonio Rosales Martínez
- Department of Chemical Engineering, Escuela Politécnica Superior, University of Sevilla, 41011 Sevilla, Spain
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3
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Hui C, Craggs L, Antonchick AP. Ring contraction in synthesis of functionalized carbocycles. Chem Soc Rev 2022; 51:8652-8675. [PMID: 36172989 DOI: 10.1039/d1cs01080h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbocycles are a key and widely present structural motif in organic compounds. The construction of structurally intriguing carbocycles, such as highly-strained fused rings, spirocycles or highly-functionalized carbocycles with congested stereocenters, remains challenging in organic chemistry. Cyclopropanes, cyclobutanes and cyclopentanes within such carbocycles can be synthesized through ring contraction. These ring contractions involve re-arrangement of and/or small molecule extrusion from a parental ring, which is either a carbocycle or a heterocycle of larger size. This review provides an overview of synthetic methods for ring contractions to form cyclopropanes, cyclobutanes and cyclopentanes en route to structurally intriguing carbocycles.
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Affiliation(s)
- Chunngai Hui
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Luke Craggs
- Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
| | - Andrey P Antonchick
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany.,Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
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4
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Mandal S, Thirupathi B. Total synthesis of proposed elgonene C and its (4 R,5 R)-diastereomer. Org Biomol Chem 2022; 20:3922-3929. [PMID: 35258060 DOI: 10.1039/d2ob00094f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total synthesis of the proposed elgonene C (1) and its (4R,5R)-diastereomer (1a) has been achieved using a second-generation oxazaborolidinium ion-catalysed Diels-Alder reaction, Sharpless asymmetric dihydroxylation, and a Ni-catalysed cross-carboxyl coupling reaction via redox-active ester (RAE) formation as key reactions. The spectral and analytical data for our synthetic compounds 1 and 1a do not match the isolation data provided by Stadler et al. which indicates that structural revision is required for the proposed elgonene C.
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Affiliation(s)
- Sudip Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, Berhampur 760 010, Odisha, India.
| | - Barla Thirupathi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, Berhampur 760 010, Odisha, India.
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5
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Abstract
Five analogs of dimethylallyl diphosphate (DMAPP) with additional or shifted Me groups were converted with isopentenyl diphosphate (IPP) and the fungal variediene synthase from Aspergillus brasiliensis (AbVS). These enzymatic reactions resulted in the formation of several new terpene analogs that were isolated and structurally characterised by NMR spectroscopy. Several DMAPP analogs showed a changed reactivity giving access to compounds with unusual skeletons. Their formation is mechanistically rationalised and the absolute configurations of all obtained compounds were determined through a stereoselective deuteration strategy, revealing absolute configurations that are analogous to that of the natural enzyme product variediene.
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Affiliation(s)
- Lin‐Fu Liang
- Kekulé-Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
| | - Jeroen S. Dickschat
- Kekulé-Institute for Organic Chemistry and BiochemistryUniversity of BonnGerhard-Domagk-Straße 153121BonnGermany
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6
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Gao L, Li G, Li X, Zhang G, Zhang M, Li Q, Ban S. Cascade Michael/aldol/rearrangement between phenacylmalononitriles and maleimides: highly diastereoselective access to functionalized bicyclic cyclopentenes containing a CN-substituted all-carbon quaternary center. Org Chem Front 2022. [DOI: 10.1039/d1qo01762d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A highly diastereoselective approach towards the synthesis of quaternary center-containing cyclopentenes was developed. The tandem Michael/aldol/rearrangement processes occurred under mild reaction conditions.
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Affiliation(s)
- Li Gao
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
| | - Gaihui Li
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
| | - Xiaokang Li
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
| | - Guoshun Zhang
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
| | - Min Zhang
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
| | - Qingshan Li
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
- Shanxi Key laboratory of Chronic Inflammatory Targeted Drugs, Shanxi University of Traditional Chinese Medicine, Jinzhong, Shanxi, 030619, China
| | - Shurong Ban
- School of Pharmacy, Shanxi Medical University, Taiyuan 030001, China
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7
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Min L, Liu X, Li CC. Total Synthesis of Natural Products with Bridged Bicyclo[m.n.1] Ring Systems via Type II [5 + 2] Cycloaddition. Acc Chem Res 2020; 53:703-718. [PMID: 32069021 DOI: 10.1021/acs.accounts.9b00640] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Natural products containing bridged ring systems are widely identified and show significant biological activity. The development of efficient synthesis reactions and strategies to construct bridged ring systems is a long-standing but very significant challenge in organic chemistry. In 2014, our group developed a unique type II [5 + 2] cycloaddition reaction that provides a facile and direct methodology for constructing highly functionalized bridged bicyclo[4.3.1], bicyclo[4.4.1], bicyclo[5.4.1], bicyclo[6.4.1], and other bicyclo[m.n.1] systems containing a strained bridgehead double bond. In this Account, we summarize the methodology development and report the results of application of our unique strategy for the total synthesis of several natural products with bridged ring systems (i.e., cyclocitrinol, cerorubenic acid-III, and vinigrol) during the past 5 years in our laboratory. In the first part, we introduce the logic behind the design and discovery of type II [5 + 2] cycloadditions. The substrates can be easily synthesized by a modular approach, followed by base-promoted group elimination under heat to form an oxidopyrylium ylide, which can undergo cycloaddition under relatively mild conditions with a variety of double bonds to generate bridged bicyclo[m.n.1] frameworks in high yield. The diastereocontrol and unique endo selectivity of this methodology are favorable for further application to the synthesis of complex natural products. In the second part, we highlight our endeavors in the total synthesis of several different types of molecules bearing bridged ring systems using our methodology. The bridged bicyclo[4.4.1] system is the core structure of two different types of natural products, cyclocitrinol and cerorubenic acid-III, that can be efficiently constructed by type II [5 + 2] cycloadditions. The development of suitable strategies and methods for site-selective cleavage of the C-O bond of the oxa-[3.2.1] ring system in the products of type II [5 + 2] cycloadditions is also discussed and highlighted during the syntheses. Moreover, the bridged bicyclo[5.3.1] system is the core structure of vinigrol, which can be constructed through a novel ring contraction sequence of the bicyclo[5.4.1] system formed by a type II [5 + 2] cycloaddition. By combining with a ring contraction cascade, we believe that type II [5 + 2] cycloadditions have the potential to be used as a unified approach to constructing natural products containing bridged bicyclo[m.n.1] frameworks.
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Affiliation(s)
- Long Min
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Xin Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
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8
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Piesch M, Reichl S, Seidl M, Balázs G, Scheer M. Ringkontraktion durch NHC‐induzierte Pnictogen‐Abstraktion. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908397] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Martin Piesch
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Stephan Reichl
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Michael Seidl
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Gábor Balázs
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
| | - Manfred Scheer
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
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9
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Piesch M, Reichl S, Seidl M, Balázs G, Scheer M. Ring Contraction by NHC‐Induced Pnictogen Abstraction. Angew Chem Int Ed Engl 2019; 58:16563-16568. [DOI: 10.1002/anie.201908397] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 09/02/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Martin Piesch
- Institute of Inorganic ChemistryUniversity of Regensburg 93040 Regensburg Germany
| | - Stephan Reichl
- Institute of Inorganic ChemistryUniversity of Regensburg 93040 Regensburg Germany
| | - Michael Seidl
- Institute of Inorganic ChemistryUniversity of Regensburg 93040 Regensburg Germany
| | - Gábor Balázs
- Institute of Inorganic ChemistryUniversity of Regensburg 93040 Regensburg Germany
| | - Manfred Scheer
- Institute of Inorganic ChemistryUniversity of Regensburg 93040 Regensburg Germany
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10
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Affiliation(s)
- Long Min
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiaohong Lin
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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11
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Hua TB, Yang QQ, Zou YQ. Recent Advances in Enantioselective Photochemical Reactions of Stabilized Diazo Compounds. Molecules 2019; 24:molecules24173191. [PMID: 31480796 PMCID: PMC6749315 DOI: 10.3390/molecules24173191] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 08/25/2019] [Accepted: 08/26/2019] [Indexed: 12/30/2022] Open
Abstract
Diazo compounds have proven to be a useful class of carbenes or metal carbenoids sources under thermal, photochemical, or metal-catalyzed conditions, which can subsequently undergo a wide range of synthetically important transformations. Recently, asymmetric photocatalysis has provoked increasing research interests, and great advances have been made in this discipline towards the synthesis of optically enriched compounds. In this context, the past two decades have been the most productive period in the developments of enantioselective photochemical reactions of diazo compounds due to a better understanding of the reactivities of diazo compounds and the emergence of new catalytic modes, as well as easier access to and treatment of stabilized diazo compounds. This review highlights these impressive achievements according to the reaction type, and the general mechanisms and stereochemical inductions are briefly discussed as well.
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Affiliation(s)
- Ting-Bi Hua
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, 8 Daxue Road, Yichang 443002, Hubei, China
| | - Qing-Qing Yang
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, 8 Daxue Road, Yichang 443002, Hubei, China.
| | - You-Quan Zou
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, 8 Daxue Road, Yichang 443002, Hubei, China
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12
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Gu Q, Wang X, Sun B, Lin G. Grob-Fragmentation-Enabled Approach to Clavulactone Analogues. Org Lett 2019; 21:5082-5085. [PMID: 31199157 DOI: 10.1021/acs.orglett.9b01678] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The novel synthetic strategy for dolabellane skeleton was realized, which allowed the synthesis of clavulactone analogues 26 and 27 in a concise and efficient manner. Salient transformations include a diastereoselective Mukaiyama aldol reaction, an intramolecular nucleophilic addition reaction, a Grob fragmentation reaction, and an efficient Mukaiyama-Michael addition reaction.
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Affiliation(s)
- Qi Gu
- 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
| | - Xuan 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
| | - Bingfeng Sun
- Taizhou Synhigher Pharmaceutical Technology Co. Ltd. , 1 Yaocheng Avenue , Taizhou , Jiangsu 225300 , China
| | - Guoqiang Lin
- 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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13
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Harada S, Nishida A. Catalytic and Enantioselective Diels‐Alder Reaction of Siloxydienes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900159] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shinji Harada
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research CenterChiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research CenterChiba University 1-33 Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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14
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Affiliation(s)
- Ritu Arora
- Computational Chemistry Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Kriti Kashyap
- Computational Chemistry Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Anshika Mittal
- Computational Chemistry Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rita Kakkar
- Computational Chemistry Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
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15
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Zheng K, Hong R. Stereoconfining macrocyclizations in the total synthesis of natural products. Nat Prod Rep 2019; 36:1546-1575. [DOI: 10.1039/c8np00094h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review covers selected examples of point chirality-forming macrocyclizations in natural product total synthesis in the past three decades.
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Affiliation(s)
- Kuan Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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16
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Eshon J, Foarta F, Landis CR, Schomaker JM. α-Tetrasubstituted Aldehydes through Electronic and Strain-Controlled Branch-Selective Stereoselective Hydroformylation. J Org Chem 2018; 83:10207-10220. [PMID: 30070109 DOI: 10.1021/acs.joc.8b01431] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydroformylation utilizes dihydrogen, carbon monoxide, and a catalyst to transform alkenes into aldehydes. This work applies chiral bisdiazaphospholane (BDP)- and bisphospholanoethane-ligated rhodium complexes to the hydroformylation of a variety of alkenes to produce chiral tetrasubstituted aldehydes. 1,1'-Disubstituted acrylates bearing electron-withdrawing substituents undergo hydroformylation under mild conditions (1 mol % of catalyst/BDP ligand, 150 psig gas, 60 °C) with high conversions and yields of tetrasubstituted aldehydes (e.g., 13:1 regioselectivity, 85% ee, and <1% hydrogenation for 1-fluoromethyl acrylate). The scope also encompasses both acyclic 1,1'-disubstituted and trisubstituted, electron-poor alkenes as well as di- and trisubstituted alkenes composed of small rings with exocyclic and endocyclic unsaturation. For example, 1-methylene-β-lactam furnished the tetrasubstituted aldehyde with 98% selectivity and up to 83% ee. Notably, chiral trisubstituted bicyclic methyleneaziridines are transformed with >99% regioselectivity and >19:1 diastereoselectivity to tetrasubstituted aldehydes at rates >50 catalyst turnovers/hour. NMR studies of the noncatalytic reaction of HRh(BDP)(CO)2 with methyl 1-fluoroacrylate enable interception of tertiary alkylrhodium intermediates, demonstrating migratory insertion to acyl species is slower than formation of secondary and primary alkylrhodium intermediates. Overall, these investigations reveal how the interplay of sterics, electronics, and ring strain are harnessed to provide access to valuable α-tetrasubstituted aldehyde synthetic building blocks by promoting branched-selective hydroformylation.
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Affiliation(s)
- Josephine Eshon
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Floriana Foarta
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Clark R Landis
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Jennifer M Schomaker
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
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17
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Xiao M, Zhang F, Du Z, Ma B. An Efficient Synthesis of 6-oxa-spiro[3.4]octan-1-one Derivates Through 3-diazochroman-4-one and Alkene. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701197] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Meiling Xiao
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Fuming Zhang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Zhe Du
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Baochun Ma
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
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18
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Ye Q, Qu P, Snyder SA. Total Syntheses of Scaparvins B, C, and D Enabled by a Key C-H Functionalization. J Am Chem Soc 2017; 139:18428-18431. [PMID: 29227651 DOI: 10.1021/jacs.7b06185] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The clerodane diterpene family possesses an impressive range of bioactivities and high synthetic challenge due to their unique amalgamation of rings, stereocenters, and oxygenation. Herein, we disclose the first total syntheses of three members, scaparvins B, C, and D, through a route fueled by several chemoselective and carefully orchestrated steps. One such operation is a tailored late-stage C-H functionalization converting a carboxylic acid into a lactone through the oxidation of a tertiary C-H bond under conditions that minimize epoxidation of an alkene. This step, among others, afforded critical functionality to complete the targets. In addition, use of an appropriate chiral catalyst with a Rawal diene renders the sequence enantioselective.
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Affiliation(s)
- Qinda Ye
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States.,Department of Chemistry, The Scripps Research Institute , 130 Scripps Way, Jupiter, Florida 33458, United States.,Department of Chemistry, University of Chicago , 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Pei Qu
- Department of Chemistry, University of Chicago , 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Scott A Snyder
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States.,Department of Chemistry, The Scripps Research Institute , 130 Scripps Way, Jupiter, Florida 33458, United States.,Department of Chemistry, University of Chicago , 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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19
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Zhao G, Yuan LZ, Alami M, Provot O. Desulfurization of Thioketals into Methylene and Methyl Derivatives: Nickel or not Nickel? ChemistrySelect 2017. [DOI: 10.1002/slct.201702370] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Guangkuan Zhao
- BioCIS, Univ. Paris-Sud, CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Ling-Zhi Yuan
- BioCIS, Univ. Paris-Sud, CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Mouad Alami
- BioCIS, Univ. Paris-Sud, CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Olivier Provot
- BioCIS, Univ. Paris-Sud, CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
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20
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Polavarapu PL, Covington CL, Raghavan V. To Avoid Chasing Incorrect Chemical Structures of Chiral Compounds: Raman Optical Activity and Vibrational Circular Dichroism Spectroscopies. Chemphyschem 2017; 18:2459-2465. [DOI: 10.1002/cphc.201700764] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Indexed: 01/12/2023]
Affiliation(s)
- Prasad L. Polavarapu
- Department of Chemistry Vanderbilt University 7330 Stevenson Center Nashville TN 37235 USA
| | - Cody L. Covington
- Department of Chemistry Vanderbilt University 7330 Stevenson Center Nashville TN 37235 USA
| | - Vijay Raghavan
- Department of Chemistry Vanderbilt University 7330 Stevenson Center Nashville TN 37235 USA
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21
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Hu P, Snyder SA. Enantiospecific Total Synthesis of the Highly Strained (−)-Presilphiperfolan-8-ol via a Pd-Catalyzed Tandem Cyclization. J Am Chem Soc 2017; 139:5007-5010. [DOI: 10.1021/jacs.7b01454] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Pengfei Hu
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
- Department
of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Scott A. Snyder
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
- Department
of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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22
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Liu T, Sun J, Wang Q, Li L, Zhou MD. CuBr2
/TBHP-Promoted Selective Dibromination and Bromohydroxylation of (Diphenylphosphoryl)allenes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tian Liu
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1 113001 Fushun P. R. China
| | - Jing Sun
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1 113001 Fushun P. R. China
| | - Qiang Wang
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1 113001 Fushun P. R. China
| | - Lei Li
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1 113001 Fushun P. R. China
| | - Ming-Dong Zhou
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1 113001 Fushun P. R. China
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23
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Kumar SN, Yu IF, Chein RJ. Oxathiaborolium: A Type of Chiral Lewis Acid Catalyst and Its Application in Catalytic and Highly Enantioselective Diels–Alder Reactions. Org Lett 2016; 19:22-25. [DOI: 10.1021/acs.orglett.6b03147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Isaac Furay Yu
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Rong-Jie Chein
- Institute
of Chemistry, Academia Sinica, Nankang, Taipei 11529, Taiwan
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24
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Urabe D, Asaba T, Inoue M. Asymmetric Total Synthesis of Crotophorbolone: Construction of the 5/7/6-Fused Ring System via an α-Alkoxy Bridgehead Radical Reaction. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160208] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Nödling AR, Möckel R, Tonner R, Hilt G. Lewis Acids as Activators in CBS-Catalysed Diels-Alder Reactions: Distortion Induced Lewis Acidity Enhancement of SnCl4. Chemistry 2016; 22:13171-80. [DOI: 10.1002/chem.201602394] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Alexander R. Nödling
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35032 Marburg Germany
| | - Robert Möckel
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35032 Marburg Germany
| | - Ralf Tonner
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35032 Marburg Germany
| | - Gerhard Hilt
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35032 Marburg Germany
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26
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Fernandes RA, Halle MB. Total synthesis of unique anti,anti-4-hydroxy-5-(1-hydroxyalkyl)-γ-lactones, polyporolide and mupirocin H. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.07.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Zhao Y, Zhou Y, Liu J, Yang D, Tao L, Liu Y, Dong X, Liu J, Qu J. Synthesis of (Z)-α-Trifluoromethyl Alkenyl Triflate: A Scaffold for Diverse Trifluoromethylated Species. J Org Chem 2016; 81:4797-806. [DOI: 10.1021/acs.joc.6b00855] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yilong Zhao
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Yuhan Zhou
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Juan Liu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Dongmei Yang
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Liang Tao
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Yang Liu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Xiaoliang Dong
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
| | - Jianhui Liu
- School
of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, P.R. China
| | - Jingping Qu
- State
Key Laboratory of Fine Chemicals, School of Pharmaceutical Science
and Technology, Dalian University of Technology, Dalian 116024, P.R. China
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28
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Mahender Reddy K, Bhimireddy E, Thirupathi B, Breitler S, Yu S, Corey EJ. Cationic Chiral Fluorinated Oxazaborolidines. More Potent, Second-Generation Catalysts for Highly Enantioselective Cycloaddition Reactions. J Am Chem Soc 2016; 138:2443-53. [DOI: 10.1021/jacs.6b00100] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karla Mahender Reddy
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Eswar Bhimireddy
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Barla Thirupathi
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Simon Breitler
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Shunming Yu
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - E. J. Corey
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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29
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Raghavan S, Rajendar S. Stereoselective total synthesis of (−)-nupharamine utilizing an α-chlorosulfide and a sulfinimine for C–C bond formation. Org Biomol Chem 2016; 14:131-7. [DOI: 10.1039/c5ob01750e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stereoselective route to nupharamine is disclosed using α-chlorosulfide and sulfinimine as reactive intermediates.
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Affiliation(s)
- Sadagopan Raghavan
- Division of Natural Product Chemistry
- Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - Sheelamanthula Rajendar
- Division of Natural Product Chemistry
- Indian Institute of Chemical Technology
- Hyderabad 500007
- India
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30
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Asaba T, Katoh Y, Urabe D, Inoue M. Total Synthesis of Crotophorbolone. Angew Chem Int Ed Engl 2015; 54:14457-61. [DOI: 10.1002/anie.201509160] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Taro Asaba
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
| | - Yuki Katoh
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
| | - Daisuke Urabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐0033 (Japan)
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31
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32
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Hog DT, Huber FME, Jiménez-Osés G, Mayer P, Houk KN, Trauner D. Evolution of a Unified Strategy for Complex Sesterterpenoids: Progress toward Astellatol and the Total Synthesis of (-)-Nitidasin. Chemistry 2015; 21:13646-65. [PMID: 26300211 PMCID: PMC4696511 DOI: 10.1002/chem.201501423] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Indexed: 12/19/2022]
Abstract
Astellatol and nitidasin belong to a subset of sesterterpenoids that share a sterically encumbered trans-hydrindane motif with an isopropyl substituent. In addition, these natural products feature intriguing polycyclic ring systems, posing significant challenges for chemical synthesis. Herein, the evolution of our stereoselective strategy for isopropyl trans-hydrindane sesterterpenoids is detailed. These endeavors included the synthesis of several building blocks, enabling studies toward all molecules of this terpenoid subclass, and of advanced intermediates of our initial route toward a biomimetic synthesis of astellatol. These findings provided the basis for a second-generation and a third-generation approach toward astellatol that eventually culminated in the enantioselective total synthesis of (-)-nitidasin. In particular, a series of substrate-controlled transformations to install the ten stereogenic centers of the target molecule was orchestrated and the carbocyclic backbone was forged in a convergent fashion. Furthermore, the progress toward the synthesis of astellatol is disclosed and insights into some observed yet unexpected diastereoselectivities by detailed quantum-mechanical calculations are provided.
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Affiliation(s)
- Daniel T Hog
- Department for Chemistry and Center of Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandstr. 5-13, 81377 München (Germany)
- Present address: Bayer Health Care, Bayer Pharma AG, BPH-GDD-CGEI-MCB-MCII, Müllerstr. 178, 13353 Berlin (Germany)
| | - Florian M E Huber
- Department for Chemistry and Center of Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandstr. 5-13, 81377 München (Germany)
| | - Gonzalo Jiménez-Osés
- Department of Chemistry and Biochemistry, University of California, 607 Charles E. Young Drive East, Los Angeles, CA 90095 (USA).
| | - Peter Mayer
- Department for Chemistry and Center of Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandstr. 5-13, 81377 München (Germany)
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, 607 Charles E. Young Drive East, Los Angeles, CA 90095 (USA)
| | - Dirk Trauner
- Department for Chemistry and Center of Integrated Protein Science, Ludwig-Maximilians-Universität München, Butenandstr. 5-13, 81377 München (Germany).
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33
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Ford A, Miel H, Ring A, Slattery CN, Maguire AR, McKervey MA. Modern Organic Synthesis with α-Diazocarbonyl Compounds. Chem Rev 2015; 115:9981-10080. [PMID: 26284754 DOI: 10.1021/acs.chemrev.5b00121] [Citation(s) in RCA: 1113] [Impact Index Per Article: 123.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Hugues Miel
- Almac Discovery Ltd. , David Keir Building, Stranmillis Road, Belfast BT9 5AG, United Kingdom
| | | | | | | | - M Anthony McKervey
- Almac Sciences Ltd. , Almac House, 20 Seagoe Industrial Estate, Craigavon BT63 5QD, United Kingdom
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34
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Williams DR, Robinson LA, Bawel SA. Conformational effects and stereocontrol in synthesis studies of medium-ring dolabellane carbocycles. Tetrahedron Lett 2015; 56:3200-3203. [PMID: 26139943 DOI: 10.1016/j.tetlet.2014.12.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Stereoselective reactions are described which lead to functionalization of the dolabellane skeleton. The stereoselectivity is attributed to conformational effects imposed by the eleven-membered ring. An efficient pathway provides for the stereocontrolled synthesis of nonracemic 6(S)-hydroxy-4(E)-dolabellene-3-one 12 and related derivatives.
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Affiliation(s)
- David R Williams
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Leslie A Robinson
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Seth A Bawel
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
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35
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Min C, Lin CT, Seidel D. Catalytic Enantioselective Intramolecular Aza-Diels-Alder Reactions. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501536] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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36
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Min C, Lin CT, Seidel D. Catalytic Enantioselective Intramolecular Aza-Diels-Alder Reactions. Angew Chem Int Ed Engl 2015; 54:6608-12. [DOI: 10.1002/anie.201501536] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/06/2022]
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37
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Trenner J, Prusov EV. A simple and efficient method for the preparation of 5-hydroxy-3-acyltetramic acids. Beilstein J Org Chem 2015; 11:323-7. [PMID: 25815086 PMCID: PMC4362042 DOI: 10.3762/bjoc.11.37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 02/20/2015] [Indexed: 11/23/2022] Open
Abstract
Oxidation of the bisenolates of 3-acyltetramic acid to the corresponding 5-hydroxylated compounds using molecular oxygen is reported. The deprotection of the resulting compounds was also achieved.
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Affiliation(s)
- Johanna Trenner
- Department of Medicinal Chemistry, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Evgeny V Prusov
- Department of Medicinal Chemistry, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
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38
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Rosales A, Muñoz-Bascón J, Roldan-Molina E, Rivas-Bascón N, Padial NM, Rodríguez-Maecker R, Rodríguez-García I, Oltra JE. Synthesis of (±)-aureol by bioinspired rearrangements. J Org Chem 2015; 80:1866-70. [PMID: 25591135 DOI: 10.1021/jo502841u] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A bioinspired and sustainable procedure for the straightforward synthesis of (±)-aureol has been achieved in eight steps (14% overall yield) from epoxyfarnesol. The key steps are the titanocene(III)-catalyzed radical cascade cyclization of an epoxyfarnesol derivative and a biosynthetically inspired sequence of 1,2-hydride and methyl shifts.
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Affiliation(s)
- Antonio Rosales
- Department of Organic Chemistry, Faculty of Sciences, University of Granada , 18071 Granada, Spain
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39
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Catalytic enantioselective synthesis of quaternary carbon stereocentres. Nature 2015; 516:181-91. [PMID: 25503231 DOI: 10.1038/nature14007] [Citation(s) in RCA: 743] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 10/21/2014] [Indexed: 12/22/2022]
Abstract
Quaternary carbon stereocentres-carbon atoms to which four distinct carbon substituents are attached-are common features of molecules found in nature. However, before recent advances in chemical catalysis, there were few methods of constructing single stereoisomers of this important structural motif. Here we discuss the many catalytic enantioselective reactions developed during the past decade for the synthesis of single stereoisomers of such organic molecules. This progress now makes it possible to incorporate quaternary stereocentres selectively in many organic molecules that are useful in medicine, agriculture and potentially other areas such as flavouring, fragrances and materials.
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40
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Takao KI, Tsunoda K, Kurisu T, Sakama A, Nishimura Y, Yoshida K, Tadano KI. Total Synthesis of (+)-Vibsanin A. Org Lett 2015; 17:756-9. [DOI: 10.1021/acs.orglett.5b00086] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kohei Tsunoda
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takuya Kurisu
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Akihiro Sakama
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yoshiyasu Nishimura
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Keisuke Yoshida
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kin-ichi Tadano
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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41
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Zhao L, Wang J, Zheng H, Li Y, Yang K, Cheng B, Jin X, Yao X, Zhai H. Silver(I)-Catalyzed Ring-Contractive Rearrangement: A New Entry to 5-Alkylidene-2-cyclopentenones. Org Lett 2014; 16:6378-81. [DOI: 10.1021/ol503176y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Liang Zhao
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Jinlian Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hongyan Zheng
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yun Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Ke Yang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Bin Cheng
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaojie Jin
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiaojun Yao
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hongbin Zhai
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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Abstract
Concise and highly stereocontrolled total syntheses of racemic and enantiopure frog alkaloid 205B (1) were accomplished in 11 steps from 4-methoxypyridines 6 and 7 in overall yields of 8 and 8%, respectively. The assembly of the core of the natural product relies on a stereoselective Tsuji-Trost allylic amination reaction and a ring-closing metathesis. The synthesis features the use of an N-acylpyridinium salt reaction to introduce the first stereocenter and an unprecedented trifluoroacetic anhydride-mediated addition of an allylstannane to a vinylogous amide with complete facial selectivity. Deoxygenation of the C4 ketone proved difficult but was accomplished via a modified Barton-McCombie reaction in the presence of a catalytic amount of diphenyl diselenide.
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Affiliation(s)
| | - Daniel L. Comins
- Department of Chemistry, North
Carolina State University, Raleigh, North Carolina 27695-8204, United States
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43
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Chapuis C, Skuy D, de Saint Laumer JY, Brauchli R. endo/exo stereoselectivity in Diels-Alder reactions of α,β-dialkylated conjugated enals to cyclic 1,3-dienes: intermediates in the synthesis of (-)-β-santalol and its analogs. Chem Biodivers 2014; 11:1470-516. [PMID: 25329781 DOI: 10.1002/cbdv.201400060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Indexed: 11/10/2022]
Abstract
Highly exo-selective [4+2] cycloadditions of cyclopenta-1,3-diene 2a to α,β-dialkyl conjugated enals 5 are compared with the analogous endo-favored Diels-Alder reaction of cyclohexa-1,3-diene 7. The exo-stereoselectivity is lower in the homologous case of methylcyclopenta-1,3-diene 9. This diastereoselectivity is discussed either in terms of a retro-homo-Diels-Alder reaction, associated with thermodynamic control, or with respect to either a competing hetero-Diels-Alder/Claisen or Cope domino pathway, or retro-Claisen/retro-hetero-Diels-Alder of the endo-homo-cycloadducts. These hypothetical mechanisms have been examined by DFT calculations at the MPW1K(CH2 Cl2 )/6-31+G** level of theory for the AlCl3 -mediated cycloadditions of 5d to 2a and 7. Application of Corey's methodology to the γ-halogeno-α-methyl-substituted dienophiles 5a and 5b allowed an enantioselective preparation of known and useful intermediates for the synthesis of either the naturally occurring (-)-β-santalol or its potentially olfactive structural analogs.
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Affiliation(s)
- Christian Chapuis
- Firmenich SA, Synthesis Department, Corporate R & D Division, P. O. Box 239, CH-1211 Geneva 8, (phone: +41-22-7803610; fax: +41-22-7803334).
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44
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Moskalenko AI, Boev VI. Palladium-catalyzed reactions of allyl acetates with N-substituted 4-trimethylstannyl-1,2,3,6-tetrahydropyridines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2014. [DOI: 10.1134/s1070428013120269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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45
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Peng Z, Narcis MJ, Takenaka N. Enantio- and periselective nitroalkene Diels-Alder reactions catalyzed by helical-chiral hydrogen bond donor catalysts. Molecules 2013; 18:9982-98. [PMID: 23966083 PMCID: PMC6270221 DOI: 10.3390/molecules18089982] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/24/2022] Open
Abstract
Helical-chiral double hydrogen bond donor catalysts promote the nitroalkene Diels-Alder reaction in an enantio- and periselective manner. This represents the first asymmetric catalytic nitroalkene Diels-Alder reaction via LUMO-lowering catalysis. To gain an insight into this new process, the substrate scope of our catalyst was investigated by exploiting readily available 5-substituted pentamethylcyclopentadienes. The catalyst was found to tolerate dienes with different steric demands as well as dienes substituted with heteroatoms. The synthetic utility of 5-substituted pentamethylcyclopentadienes is rather limited, and thus we have developed a three-step route to 1,4,5,5-tetrasubstituted cyclopentadienes from commercially available ketones.
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Affiliation(s)
| | | | - Norito Takenaka
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-305-284-3279; Fax: +1-305-284-4571
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46
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Subramanian T, Subramanian KL, Sunkara M, Onono FO, Morris AJ, Spielmann HP. Syntheses of deuterium labeled prenyldiphosphate and prenylcysteine analogues for in vivo mass spectrometric quantification. J Labelled Comp Radiopharm 2013; 56:370-5. [PMID: 24285475 DOI: 10.1002/jlcr.3049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 03/15/2013] [Indexed: 11/12/2022]
Abstract
A Wittig reaction employing Li(CD3)2CP(C6H5)3 was used to prepare d6-farnesol and d6-geranylgeraniol. Reductive amination of aniline-2,3,4,5,6-d5 was used to prepare the unnatural isoprenoid analogues d5-anilinogeraniol and d5-anilinofarnesol. All of these deuterated isoprenols were elaborated into their diphosphate and cysteine thioether derivatives suitable for use as stable-isotope labeled standards for quantitative mass spectrometric analysis.
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Affiliation(s)
- Thangaiah Subramanian
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, 40536, USA
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47
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Dimitrijević E, Taylor MS. Organoboron Acids and Their Derivatives as Catalysts for Organic Synthesis. ACS Catal 2013. [DOI: 10.1021/cs4000848] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Elena Dimitrijević
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S
3H6, Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S
3H6, Canada
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48
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Williams DR, Pinchman JR. Studies of neodolastanes — Synthesis of the tricyclic core of the trichoaurantianolides. CAN J CHEM 2013. [DOI: 10.1139/v2012-088] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Studies toward the synthesis of trichoaurantianolide C (5) are described. Stille cross-coupling reactions of (E)- and (Z)-β-stannyl-α,β-unsaturated esters with allylic acetate 32 provide for the stereocontrolled formation of nonconjugated 2,5-diene-1-ols. Studies of the asymmetric Sharpless epoxidation are utilized to establish diastereofacial selectivity for the preparation of a crucial C2 tertiary allylic alcohol for subsequent esterification and ring-closing metathesis. SmI2 reductive cyclization of the key butenolide precursor 49 led to formation of the central seven-membered ring of the tricyclic core of the natural product.
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Affiliation(s)
- David R. Williams
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana, 47405-7102, USA
| | - Joseph R. Pinchman
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana, 47405-7102, USA
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49
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Peng Z, Takenaka N. Applications of Helical-Chiral Pyridines as Organocatalysts in Asymmetric Synthesis. CHEM REC 2012; 13:28-42. [DOI: 10.1002/tcr.201200010] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Indexed: 11/09/2022]
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50
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Malinowski JT, McCarver SJ, Johnson JS. Diastereocontrolled construction of pactamycin's complex ureido triol functional array. Org Lett 2012; 14:2878-81. [PMID: 22617016 PMCID: PMC3366368 DOI: 10.1021/ol301140c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An advanced intermediate in a projected synthesis of pactamycin has been prepared. Early installation of the C1-dimethylurea functionality allows for its participation in a diastereoselective, chelation-controlled addition of organometal nucleophiles to the C5 prochiral ketone. Four of the molecule's six stereocenters are set with a ketone functional handle provided for subsequent manipulation.
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Affiliation(s)
- Justin T. Malinowski
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Stefan J. McCarver
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Jeffrey S. Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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