151
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Liu J, Ma D. A Unified Approach for the Assembly of Atisine‐ and Hetidine‐type Diterpenoid Alkaloids: Total Syntheses of Azitine and the Proposed Structure of Navirine C. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Jie Liu
- State Key Laboratory of Bioorganic & Natural Products ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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152
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Dethe DH, Mahapatra S, Sau SK. Enantioselective Total Synthesis and Assignment of the Absolute Configuration of the Meroterpenoid (+)-Taondiol. Org Lett 2018; 20:2766-2769. [PMID: 29672071 DOI: 10.1021/acs.orglett.8b00997] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first enantioselective total synthesis of (+)-taondiol, a pentacyclic marine meroterpenoid, has been achieved, which in addition to confirming the structure also established the absolute configuration of the natural product. The notable points in the synthetic route are synthesis of a highly functionalized tricyclic diterpenoid moiety starting from an enantiopure Wieland-Miescher ketone derivative in concise manner via Robinson-type annulation and an elegant hydrogen atom transfer olefin reduction followed by Lewis acid-catalyzed Friedel-Crafts reaction for one-pot C-C and C-O bond formations resulting in construction of the pentacyclic meroterpenoid skeleton.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur 208016 , India
| | - Samarpita Mahapatra
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur 208016 , India
| | - Susanta Kumar Sau
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur 208016 , India
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153
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Kuo JL, Lorenc C, Abuyuan JM, Norton JR. Catalysis of Radical Cyclizations from Alkyl Iodides under H 2: Evidence for Electron Transfer from [CpV(CO) 3H]<sup/>. J Am Chem Soc 2018; 140:4512-4516. [PMID: 29543448 PMCID: PMC6373875 DOI: 10.1021/jacs.8b02119] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Radical cyclizations are most often achieved with Bu3SnH in the presence of a radical initiator, but environmental considerations demand that alternative reagents be developed-ones that can serve as a synthetic equivalent to the hydrogen atom. We have revisited [CpV(CO)3H]-, a known replacement for Bu3SnH, and found that it can be used catalytically under H2 in the presence of a base. We have carried out tin-free catalytic radical cyclizations of alkyl iodide substrates. The reactions are atom-efficient, and the conditions are mild, with broad tolerance for functional groups. We have, for example, achieved the first 5-exo radical cyclization involving attack onto a vinyl chloride. We suggest that the radicals are generated by an initial electron transfer.
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Affiliation(s)
- Jonathan L Kuo
- Department of Chemistry , Columbia University , 3000 Broadway , New York , New York 10027 , United States
| | - Chris Lorenc
- Department of Chemistry , Columbia University , 3000 Broadway , New York , New York 10027 , United States
| | - Janine M Abuyuan
- Department of Chemistry , Barnard College , 3009 Broadway , New York , New York 10027
| | - Jack R Norton
- Department of Chemistry , Columbia University , 3000 Broadway , New York , New York 10027 , United States
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154
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Yang L, Ji WW, Lin E, Li JL, Fan WX, Li Q, Wang H. Synthesis of Alkylated Monofluoroalkenes via Fe-Catalyzed Defluorinative Cross-Coupling of Donor Alkenes with gem-Difluoroalkenes. Org Lett 2018; 20:1924-1927. [DOI: 10.1021/acs.orglett.8b00471] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ling Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wei-Wei Ji
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - E Lin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Ji-Lin Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wen-Xin Fan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Qingjiang Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Honggen Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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155
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Qi J, Zheng J, Cui S. Fe(III)-Catalyzed Hydroallylation of Unactivated Alkenes with Morita–Baylis–Hillman Adducts. Org Lett 2018; 20:1355-1358. [DOI: 10.1021/acs.orglett.8b00108] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jifeng Qi
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Jing Zheng
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Sunliang Cui
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
- State
Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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156
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Abstract
An 18-step synthesis of the antibiotic (+)-pleuromutilin is disclosed. The key steps of the synthesis include a highly stereoselective SmI2-mediated cyclization to establish the eight-membered ring and a stereospecific transannular [1,5]-hydrogen atom transfer to set the C10 stereocenter. This strategy was also used to prepare (+)-12-epi-pleuromutilin. The chemistry described here will enable efforts to prepare new mutilin antibiotics.
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Affiliation(s)
| | | | - Felix Schäfers
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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157
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Abstract
The first total synthesis of (-)-xestosaprol N and O is described. This synthetic work features a convergent strategy: (1) a Pd-catalyzed arylation followed by cyclization to build a naphthalene fragment (ring C, D); (2) utilization of (-)-quinic acid to construct the chiral hydroxyl group at C-2; (3) a substrate controlled intramolecular Heck reaction to construct a quaternary carbon center (ring B); (4) introduction of a hypotaurine moiety at a late stage to furnish the E ring.
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Affiliation(s)
- Yingbo Shi
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, China
| | - Yang Ji
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, China
| | - Kunyun Xin
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, China
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158
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Liu Y, Feng J, Liu X, Wang J. Theoretical study with DFT on the mechanism of visible light-driven β-functionalization of aldehydes. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2017.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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159
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Saladrigas M, Bosch C, Saborit GV, Bonjoch J, Bradshaw B. Radical Cyclization of Alkene-Tethered Ketones Initiated by Hydrogen-Atom Transfer. Angew Chem Int Ed Engl 2017; 57:182-186. [DOI: 10.1002/anie.201709659] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Mar Saladrigas
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Caroline Bosch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Gisela V. Saborit
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Ben Bradshaw
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
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160
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Saladrigas M, Bosch C, Saborit GV, Bonjoch J, Bradshaw B. Radical Cyclization of Alkene-Tethered Ketones Initiated by Hydrogen-Atom Transfer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709659] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mar Saladrigas
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Caroline Bosch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Gisela V. Saborit
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Josep Bonjoch
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
| | - Ben Bradshaw
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB; Universitat de Barcelona; Av. Joan XXIII s/n 08028- Barcelona Spain
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161
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Ohtawa M, Krambis MJ, Cerne R, Schkeryantz JM, Witkin JM, Shenvi RA. Synthesis of (-)-11-O-Debenzoyltashironin: Neurotrophic Sesquiterpenes Cause Hyperexcitation. J Am Chem Soc 2017. [PMID: 28644021 DOI: 10.1021/jacs.7b04206] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
11-O-Debenzoyltashironin (1) is a member of the neurotrophic sesquiterpenes, trace plant metabolites that enhance neurite outgrowth in cultured neurons. We report its synthesis in six steps from a butenolide heterodimer via its likely biosynthetic precursor, 3,6-dideoxy-10-hydroxypseudoanisatin, here identified as the chain tautomer of 1. Access to the tashironin chemotype fills a gap in a comparison set of convulsive and neurotrophic sesquiterpenes, which we hypothesized to share a common target. Here we show that both classes mutually hyperexcite rat cortical neurons, consistent with antagonism of inhibitory channels and a mechanism of depolarization-induced neurite outgrowth.
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Affiliation(s)
- Masaki Ohtawa
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Michael J Krambis
- Eli Lilly and Company , Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Rok Cerne
- Eli Lilly and Company , Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Jeffrey M Schkeryantz
- Eli Lilly and Company , Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Jeffrey M Witkin
- Eli Lilly and Company , Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Ryan A Shenvi
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
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162
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Liu C, Chen R, Shen Y, Liang Z, Hua Y, Zhang Y. Total Synthesis of Aplydactone by a Conformationally Controlled C−H Functionalization. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703803] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Chenguang Liu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Renzhi Chen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Zhanhao Liang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yuhui Hua
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
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163
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Liu C, Chen R, Shen Y, Liang Z, Hua Y, Zhang Y. Total Synthesis of Aplydactone by a Conformationally Controlled C−H Functionalization. Angew Chem Int Ed Engl 2017; 56:8187-8190. [DOI: 10.1002/anie.201703803] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Chenguang Liu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Renzhi Chen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yang Shen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Zhanhao Liang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yuhui Hua
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province; Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 China
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164
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Zweig JE, Kim DE, Newhouse TR. Methods Utilizing First-Row Transition Metals in Natural Product Total Synthesis. Chem Rev 2017; 117:11680-11752. [PMID: 28525261 DOI: 10.1021/acs.chemrev.6b00833] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
First-row transition-metal-mediated reactions constitute an important and growing area of research due to the low cost, low toxicity, and exceptional synthetic versatility of these metals. Currently, there is considerable effort to replace existing precious-metal-catalyzed reactions with first-row analogs. More importantly, there are a plethora of unique transformations mediated by first-row metals, which have no classical second- or third-row counterpart. Herein, the application of first-row metal-mediated methods to the total synthesis of natural products is discussed. This Review is intended to highlight strategic uses of these metals to realize efficient syntheses and highlight the future potential of these reagents and catalysts in organic synthesis.
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Affiliation(s)
- Joshua E Zweig
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Daria E Kim
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
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165
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Xie J, Wang J, Dong G. Synthetic Study of Phainanoids. Highly Diastereoselective Construction of the 4,5-Spirocycle via Palladium-Catalyzed Intramolecular Alkenylation. Org Lett 2017; 19:3017-3020. [DOI: 10.1021/acs.orglett.7b01303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiaxin Xie
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Jianchun Wang
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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166
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Daub ME, Roosen PC, Vanderwal CD. General Approaches to Structurally Diverse Isocyanoditerpenes. J Org Chem 2017; 82:4533-4541. [PMID: 28402638 DOI: 10.1021/acs.joc.7b00448] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Since their discovery in the 1970s, the striking architectures and the unusual isonitrile functional groups of the isocyanoterpenes have attracted the interest of many organic chemists. The more recent revelation of their potent in vitro antiplasmodial activity sparked new endeavors to synthesize members of this family of secondary metabolites. In this Synopsis, we discuss three distinct strategies that each address multiple structurally different members of the isocyanoterpenes, ending with some of our group's recent contributions in this area.
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Affiliation(s)
- Mary Elisabeth Daub
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, 92697-2025 California, United States
| | - Philipp C Roosen
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, 92697-2025 California, United States
| | - Christopher D Vanderwal
- Department of Chemistry, University of California , 1102 Natural Sciences II, Irvine, 92697-2025 California, United States
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167
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Schevenels FT, Shen M, Snyder SA. Isolable and Readily Handled Halophosphonium Pre-reagents for Hydro- and Deuteriohalogenation. J Am Chem Soc 2017; 139:6329-6337. [PMID: 28462991 DOI: 10.1021/jacs.6b12653] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Although the addition of acid halides across olefins is well-studied, limitations remain with a number of substrate classes that possess leaving groups, polyunsaturation, and acid-sensitive moieties, particularly polyenes prone to cyclization. The process is also challenging when conducted on a small scale, and moreover, methods for the addition of their deuterated counterparts typically require special techniques, especially when control of stoichiometry is required. Herein is described a readily synthesized and handled reagent class which can accomplish the controlled and selective Markovnikov addition of both HCl and HBr across several alkene classes under mild reaction conditions tolerant of diverse functionality. The process is particularly valuable on a laboratory scale, and direct comparisons to other methods are provided. As a result of in-depth mechanistic studies seeking to understand how these novel tools work and the active species behind their efficacy, the means to easily add DCl and DBr using a controlled amount of D2O was discovered along with the critical role of hydrolysis in leading to active hydrohalogenation species.
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Affiliation(s)
- Florian T Schevenels
- 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
| | - Minxing Shen
- 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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168
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Ma X, Dang H, Rose JA, Rablen P, Herzon SB. Hydroheteroarylation of Unactivated Alkenes Using N-Methoxyheteroarenium Salts. J Am Chem Soc 2017; 139:5998-6007. [DOI: 10.1021/jacs.7b02388] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xiaoshen Ma
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Hester Dang
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - John A. Rose
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Paul Rablen
- Department
of Chemistry and Biochemistry, Swarthmore College, Swarthmore, Pennsylvania 19081, United States
| | - Seth B. Herzon
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Department
of Pharmacology, Yale School of Medicine, New Haven, Connecticut 06520, United States
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169
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Shen Y, Huang B, Zheng J, Lin C, Liu Y, Cui S. Csp-Csp 3 Bond Formation via Iron(III)-Promoted Hydroalkynylation of Unactivated Alkenes. Org Lett 2017; 19:1744-1747. [PMID: 28353346 DOI: 10.1021/acs.orglett.7b00499] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An iron(III)-promoted hydroalkynylation of unactivated alkenes toward Csp-Csp3 bond formation has been developed. Various alkenes, including mono-, di-, and trisubstituted alkenes, could all smoothly convert to structural diversified alkynes in this chemoselective protocol. Additionally, the scalability was unraveled and the further divergent transformations of products were conducted to demonstrate the synthetic utility.
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Affiliation(s)
- Yangyong Shen
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Bo Huang
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Jing Zheng
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Chen Lin
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Yu Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University , Hangzhou 310058, Zhejiang, China
| | - Sunliang Cui
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
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170
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Lo JC, Kim D, Pan CM, Edwards JT, Yabe Y, Gui J, Qin T, Gutiérrez S, Giacoboni J, Smith MW, Holland PL, Baran PS. Fe-Catalyzed C-C Bond Construction from Olefins via Radicals. J Am Chem Soc 2017; 139:2484-2503. [PMID: 28094980 PMCID: PMC5314431 DOI: 10.1021/jacs.6b13155] [Citation(s) in RCA: 260] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
![]()
This Article details the development
of the iron-catalyzed conversion
of olefins to radicals and their subsequent use in the construction
of C–C bonds. Optimization of a reductive diene cyclization
led to the development of an intermolecular cross-coupling of electronically-differentiated
donor and acceptor olefins. Although the substitution on the donor
olefins was initially limited to alkyl and aryl groups, additional
efforts culminated in the expansion of the scope of the substitution
to various heteroatom-based functionalities, providing a unified olefin
reactivity. A vinyl sulfone acceptor olefin was developed, which allowed
for the efficient synthesis of sulfone adducts that could be used
as branch points for further diversification. Moreover, this reactivity
was extended into an olefin-based Minisci reaction to functionalize
heterocyclic scaffolds. Finally, mechanistic studies resulted in a
more thorough understanding of the reaction, giving rise to the development
of a more efficient second-generation set of olefin cross-coupling
conditions.
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Affiliation(s)
- Julian C Lo
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Dongyoung Kim
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Chung-Mao Pan
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jacob T Edwards
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Yuki Yabe
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jinghan Gui
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tian Qin
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Sara Gutiérrez
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jessica Giacoboni
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Myles W Smith
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Patrick L Holland
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Phil S Baran
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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171
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Yan M, Lo JC, Edwards JT, Baran PS. Radicals: Reactive Intermediates with Translational Potential. J Am Chem Soc 2016; 138:12692-12714. [PMID: 27631602 PMCID: PMC5054485 DOI: 10.1021/jacs.6b08856] [Citation(s) in RCA: 656] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 02/08/2023]
Abstract
This Perspective illustrates the defining characteristics of free radical chemistry, beginning with its rich and storied history. Studies from our laboratory are discussed along with recent developments emanating from others in this burgeoning area. The practicality and chemoselectivity of radical reactions enable rapid access to molecules of relevance to drug discovery, agrochemistry, material science, and other disciplines. Thus, these reactive intermediates possess inherent translational potential, as they can be widely used to expedite scientific endeavors for the betterment of humankind.
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Affiliation(s)
- Ming Yan
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Julian C. Lo
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jacob T. Edwards
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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172
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Ma X, Herzon SB. Synthesis of Ketones and Esters from Heteroatom-Functionalized Alkenes by Cobalt-Mediated Hydrogen Atom Transfer. J Org Chem 2016; 81:8673-8695. [PMID: 27598718 DOI: 10.1021/acs.joc.6b01709] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cobalt bis(acetylacetonate) is shown to mediate hydrogen atom transfer to a broad range of functionalized alkenes; in situ oxidation of the resulting alkylradical intermediates, followed by hydrolysis, provides expedient access to ketones and esters. By modification of the alcohol solvent, different alkyl ester products may be obtained. The method is compatible with a number of functional groups including alkenyl halides, sulfides, triflates, and phosphonates and provides a mild and practical alternative to the Tamao-Fleming oxidation of vinylsilanes and the Arndt-Eistert homologation.
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Affiliation(s)
- Xiaoshen Ma
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Seth B Herzon
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States.,Department of Pharmacology, Yale School of Medicine , New Haven, Connecticut 06520, United States
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173
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Green SA, Matos JLM, Yagi A, Shenvi RA. Branch-Selective Hydroarylation: Iodoarene–Olefin Cross-Coupling. J Am Chem Soc 2016; 138:12779-12782. [DOI: 10.1021/jacs.6b08507] [Citation(s) in RCA: 175] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Samantha A. Green
- Department of Chemistry, The Scripps Research Institute, 10550 North
Torrey Pines Road, La Jolla, California 92037, United States
| | - Jeishla L. M. Matos
- Department of Chemistry, The Scripps Research Institute, 10550 North
Torrey Pines Road, La Jolla, California 92037, United States
| | - Akiko Yagi
- Department of Chemistry, The Scripps Research Institute, 10550 North
Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan A. Shenvi
- Department of Chemistry, The Scripps Research Institute, 10550 North
Torrey Pines Road, La Jolla, California 92037, United States
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174
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Feng J, Noack F, Krische MJ. Modular Terpenoid Construction via Catalytic Enantioselective Formation of All-Carbon Quaternary Centers: Total Synthesis of Oridamycin A, Triptoquinones B and C, and Isoiresin. J Am Chem Soc 2016; 138:12364-7. [PMID: 27632643 DOI: 10.1021/jacs.6b08902] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Total syntheses of oridamycin A, triptoquinones B and C, and isoiresin are accomplished from a common intermediate prepared via iridium-catalyzed alcohol C-H tert-(hydroxy)prenylation - a byproduct-free process that forms an all-carbon quaternary stereocenter with excellent control of diastereo- and enantioselectivity.
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Affiliation(s)
- Jiajie Feng
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Florian Noack
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Michael J Krische
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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175
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Raya B, Biswas S, RajanBabu TV. Selective Cobalt-Catalyzed Reduction of Terminal Alkenes and Alkynes Using (EtO) 2Si(Me)H as a Stoichiometric Reductant. ACS Catal 2016; 6:6318-6323. [PMID: 28078166 DOI: 10.1021/acscatal.6b02272] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While attempting to effect Co-catalyzed hydrosilylation of β-vinyl trimethylsilyl enol ethers we discovered that depending on the silane, solvent and the method of generation of the reduced cobalt catalyst, a highly efficient and selective reduction or hydrosilylation of an alkene can be achieved. This paper deals with this reduction reaction, which has not been reported before in spite of the huge research activity in this area. The reaction, which uses an air-stable [2,6-di(aryliminoyl)pyridine)]CoCl2 activated by 2 equivalents of NaEt3BH as a catalyst (0.001-0.05 equiv) and (EtO)2SiMeH as the hydrogen source, is best run at ambient temperature in toluene and is highly selective for the reduction of simple unsubstituted 1-alkenes and the terminal double bonds in 1,3- and 1,4-dienes, β-vinyl ketones and silyloxy dienes. The reaction is tolerant of various functional groups such as a bromide, alcohol, amine, carbonyl, and di or trisubstituted double bonds, and water. Highly selective reduction of a terminal alkyne to either an alkene or alkane can be accomplished by using stoichiometric amounts of the silane. Preliminary mechanistic studies indicate that the reaction is stoichiometric in the silane and both hydrogens in the product come from the silane.
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Affiliation(s)
- Balaram Raya
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
| | - Souvagya Biswas
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
| | - T. V. RajanBabu
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
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176
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Abstract
Redox events in which an electron and proton are exchanged in a concerted elementary step are commonly referred to as proton-coupled electron transfers (PCETs). PCETs are known to operate in numerous important biological redox processes, as well as recent inorganic technologies for small molecule activation. These studies suggest that PCET catalysis might also function as a general mode of substrate activation in organic synthesis. Over the past three years, our group has worked to advance this hypothesis and to demonstrate the synthetic utility of PCET through the development of novel catalytic radical chemistries. The central aim of these efforts has been to demonstrate the ability of PCET to homolytically activate a wide variety of common organic functional groups that are energetically inaccessible using known molecular H atom transfer catalysts. To do so, we made use of a simple formalism first introduced by Mayer and co-workers that allowed us to predict the thermodynamic capacity of any oxidant/base or reductant/acid pair to formally add or remove H· from a given substrate. With this insight, we were able to rationally select catalyst combinations thermodynamically competent to homolyze the extraordinarily strong E-H σ-bonds found in many common protic functional groups (BDFEs > 100 kcal/mol) or to form unusually weak bonds to hydrogen via the reductive action of common organic π-systems (BDFEs < 35 kcal/mol). These ideas were reduced to practice through the development of new catalyst systems for reductive PCET activations of ketones and oxidative PCET activation of amide N-H bonds to directly furnish reactive ketyl and amidyl radicals, respectively. In both systems, the reaction outcomes were found to be successfully predicted using the effective bond strength formalism, suggesting that these simple thermochemical considerations can provide useful and actionable insights into PCET reaction design. The ability of PCET catalysis to control enantioselectivity in free radical processes has also been established. Specifically, multisite PCET requires the formation of a pre-equilibrium hydrogen bond between the substrate and a proton donor/acceptor prior to charge transfer. We recognized that these H-bond interfaces persist following the PCET event, resulting in the formation of noncovalent complexes of the nascent radical intermediates. When chiral proton donors/acceptors are employed, this association can provide a basis for asymmetric induction in subsequent bond-forming steps. We discuss our efforts to capitalize on this understanding via the development of a catalytic protocol for enantioselective aza-pinacol cyclizations. Lastly, we highlight an alternative PCET mechanism that exploits the ability of redox-active metals to homolytically weaken the bonds in coordinated ligands, enabling nominally strong bonds (BDFEs ∼ 100 kcal) to be abstracted by weak H atom acceptors with concomitant oxidation of the metal center. This "soft homolysis" mechanism enables the generation of metalated intermediates from protic substrates under completely neutral conditions. The first example of this form of catalysis is presented in the context of a catalytic C-N bond forming reaction jointly mediated by bulky titanocene complexes and the stable nitroxyl radical TEMPO.
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Affiliation(s)
- Emily C. Gentry
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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177
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Shigehisa H, Hayashi M, Ohkawa H, Suzuki T, Okayasu H, Mukai M, Yamazaki A, Kawai R, Kikuchi H, Satoh Y, Fukuyama A, Hiroya K. Catalytic Synthesis of Saturated Oxygen Heterocycles by Hydrofunctionalization of Unactivated Olefins: Unprotected and Protected Strategies. J Am Chem Soc 2016; 138:10597-604. [DOI: 10.1021/jacs.6b05720] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroki Shigehisa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Miki Hayashi
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Haruna Ohkawa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Tsuyoshi Suzuki
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hiroki Okayasu
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Mayumi Mukai
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Ayaka Yamazaki
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Ryohei Kawai
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Harue Kikuchi
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Yui Satoh
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Akane Fukuyama
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Kou Hiroya
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi Nishitokyo-shi, Tokyo 202-8585, Japan
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178
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179
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Crossley SWM, Obradors C, Martinez RM, Shenvi RA. Mn-, Fe-, and Co-Catalyzed Radical Hydrofunctionalizations of Olefins. Chem Rev 2016; 116:8912-9000. [PMID: 27461578 PMCID: PMC5872827 DOI: 10.1021/acs.chemrev.6b00334] [Citation(s) in RCA: 599] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cofactor-mimetic aerobic oxidation has conceptually merged with catalysis of syngas reactions to form a wide range of Markovnikov-selective olefin radical hydrofunctionalizations. We cover the development of the field and review contributions to reaction invention, mechanism, and application to complex molecule synthesis. We also provide a mechanistic framework for understanding this compendium of radical reactions.
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Affiliation(s)
- Steven W M Crossley
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Carla Obradors
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Ruben M Martinez
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
| | - Ryan A Shenvi
- Department of Chemistry, The Scripps Research Institute , La Jolla, California 92037, United States
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180
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Zhang Y, Xue Y, Li G, Yuan H, Luo T. Enantioselective synthesis of Iboga alkaloids and vinblastine via rearrangements of quaternary ammoniums. Chem Sci 2016; 7:5530-5536. [PMID: 30034694 PMCID: PMC6021789 DOI: 10.1039/c6sc00932h] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/13/2016] [Indexed: 11/21/2022] Open
Abstract
An efficient and novel strategy for the enantioselective syntheses of various iboga alkaloids has been developed. The salient features include a gold-catalyzed oxidation of a terminal alkyne followed by cyclization, a Stevens rearrangement and a tandem sequence that combines the gold-catalyzed oxidation, cyclization and [1,2]-shift. The catharanthine analogs provided by our approach were further converted to the vinca alkaloid vinblastine and its analogs, which confirmed the remarkable sensitivity of the cytotoxicity to the C20' substituent of vinblastine.
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Affiliation(s)
- Yun Zhang
- Laboratory of Chemical Genomics , School of Chemical Biology and Biotechnology , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Yibin Xue
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Gang Li
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Haosen Yuan
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
| | - Tuoping Luo
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , Beijing National Laboratory for Molecular Science (BNLMS) , College of Chemistry and Molecular Engineering , Peking-Tsinghua Center for Life Sciences , Academy for Advanced Interdisciplinary Studies , Peking University , Beijing 100871 , China .
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181
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Gao AX, Hamada T, Snyder SA. The Enantioselective Total Synthesis of Exochomine. Angew Chem Int Ed Engl 2016; 55:10301-6. [DOI: 10.1002/anie.201604744] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Alison X. Gao
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Tomoaki Hamada
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Scott A. Snyder
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
- Dept. of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
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182
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Gao AX, Hamada T, Snyder SA. The Enantioselective Total Synthesis of Exochomine. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alison X. Gao
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Tomoaki Hamada
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Scott A. Snyder
- Dept. of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
- Dept. of Chemistry University of Chicago 5735 S. Ellis Avenue Chicago IL 60637 USA
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183
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Shigehisa H, Ano T, Honma H, Ebisawa K, Hiroya K. Co-Catalyzed Hydroarylation of Unactivated Olefins. Org Lett 2016; 18:3622-5. [DOI: 10.1021/acs.orglett.6b01662] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroki Shigehisa
- Faculty of Pharmacy, Musashino University, 1-1-20, Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Takuya Ano
- Faculty of Pharmacy, Musashino University, 1-1-20, Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Hiroshi Honma
- Faculty of Pharmacy, Musashino University, 1-1-20, Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Kousuke Ebisawa
- Faculty of Pharmacy, Musashino University, 1-1-20, Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Kou Hiroya
- Faculty of Pharmacy, Musashino University, 1-1-20, Shinmachi, Nishitokyo-shi, Tokyo 202-8585, Japan
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184
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Affiliation(s)
- Xiaoshen Ma
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Seth B. Herzon
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Department
of Pharmacology, Yale School of Medicine, New Haven, Connecticut 06520, United States
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185
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Carney JR, Dillon BR, Thomas SP. Recent Advances of Manganese Catalysis for Organic Synthesis. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600018] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jonathan R. Carney
- EaStCHEM School of Chemistry; University of Edinburgh; Joseph Black Building, David Brewster Road EH9 3FJ Edinburgh UK
| | - Barry. R. Dillon
- AstraZeneca; Alderley Park SK10 4TG Macclesfield Cheshire United Kingdom
| | - Stephen P. Thomas
- EaStCHEM School of Chemistry; University of Edinburgh; Joseph Black Building, David Brewster Road EH9 3FJ Edinburgh UK
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186
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Martinez L, Umemiya S, Wengryniuk SE, Baran PS. 11-Step Total Synthesis of Pallambins C and D. J Am Chem Soc 2016; 138:7536-9. [PMID: 27284962 PMCID: PMC4919752 DOI: 10.1021/jacs.6b04816] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Indexed: 11/30/2022]
Abstract
The structurally intriguing terpenes pallambins C and D have been assembled in only 11 steps from a cheap commodity chemical: furfuryl alcohol. This synthesis, which features a redox-economic approach free of protecting-group manipulations, assembles all four-ring systems via a sequential cyclization strategy. Of these four-ring constructing operations, two are classical (Robinson annulation and Mukaiyama aldol) and two are newly devised. During the course of this work a method for the difunctionalization of enol ethers was developed, and the scope of this transformation was explored.
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Affiliation(s)
| | | | | | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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187
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Li G, Kuo JL, Han A, Abuyuan JM, Young LC, Norton JR, Palmer JH. Radical Isomerization and Cycloisomerization Initiated by H• Transfer. J Am Chem Soc 2016; 138:7698-704. [PMID: 27167594 DOI: 10.1021/jacs.6b03509] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Under H2 pressure, Co(II)(dmgBF2)2L2 (L = H2O, THF) generates a low concentration of an H• donor. Transfer of the H• onto an olefin gives a radical that can either (1) transfer an H• back to the metal, generating an isomerized olefin, or (2) add intramolecularly to a double bond, generating a cyclized radical. Transfer of an H• back to the metal from the cyclized radical results in a cycloisomerization. Both outcomes are favored by the low concentration of the cobalt H• donor, whereas hydrogenation and cyclohydrogenation are more likely with other catalysts (when the concentration of the H• donor is high).
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Affiliation(s)
- Gang Li
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
| | - Jonathan L Kuo
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
| | - Arthur Han
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
| | - Janine M Abuyuan
- Department of Chemistry, Barnard College , 3009 Broadway, New York, New York 10027, United States
| | - Lily C Young
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
| | - Jack R Norton
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
| | - Joshua H Palmer
- Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States
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188
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Miller DC, Tarantino KT, Knowles RR. Proton-Coupled Electron Transfer in Organic Synthesis: Fundamentals, Applications, and Opportunities. Top Curr Chem (Cham) 2016; 374:30. [PMID: 27573270 PMCID: PMC5107260 DOI: 10.1007/s41061-016-0030-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
Abstract
Proton-coupled electron transfers (PCETs) are unconventional redox processes in which both protons and electrons are exchanged, often in a concerted elementary step. While PCET is now recognized to play a central a role in biological redox catalysis and inorganic energy conversion technologies, its applications in organic synthesis are only beginning to be explored. In this chapter, we aim to highlight the origins, development, and evolution of the PCET processes most relevant to applications in organic synthesis. Particular emphasis is given to the ability of PCET to serve as a non-classical mechanism for homolytic bond activation that is complimentary to more traditional hydrogen atom transfer processes, enabling the direct generation of valuable organic radical intermediates directly from their native functional group precursors under comparatively mild catalytic conditions. The synthetically advantageous features of PCET reactivity are described in detail, along with examples from the literature describing the PCET activation of common organic functional groups.
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Affiliation(s)
- David C Miller
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Kyle T Tarantino
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Robert R Knowles
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA.
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189
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Lu HH, Pronin SV, Antonova-Koch Y, Meister S, Winzeler EA, Shenvi RA. Synthesis of (+)-7,20-Diisocyanoadociane and Liver-Stage Antiplasmodial Activity of the Isocyanoterpene Class. J Am Chem Soc 2016; 138:7268-71. [PMID: 27244042 DOI: 10.1021/jacs.6b03899] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
7,20-Diisocyanoadociane, a scarce marine metabolite with potent antimalarial activity, was synthesized as a single enantiomer in 13 steps from simple building blocks (17 linear steps). Chemical synthesis enabled identification of isocyanoterpene antiplasmodial activity against liver-stage parasites, which suggested that inhibition of heme detoxification does not exclusively underlie the mechanism of action of this class.
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Affiliation(s)
- Hai-Hua Lu
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Sergey V Pronin
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Yevgeniya Antonova-Koch
- Department of Pediatrics, University of California, San Diego, School of Medicine , 9500 Gilman Drive 0741, La Jolla, California 92093, United States
| | - Stephan Meister
- Department of Pediatrics, University of California, San Diego, School of Medicine , 9500 Gilman Drive 0741, La Jolla, California 92093, United States
| | - Elizabeth A Winzeler
- Department of Pediatrics, University of California, San Diego, School of Medicine , 9500 Gilman Drive 0741, La Jolla, California 92093, United States
| | - Ryan A Shenvi
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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190
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Shen Y, Qi J, Mao Z, Cui S. Fe-Catalyzed Hydroalkylation of Olefins with para-Quinone Methides. Org Lett 2016; 18:2722-5. [DOI: 10.1021/acs.orglett.6b01173] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yangyong Shen
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Jifeng Qi
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Zhenjun Mao
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
| | - Sunliang Cui
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
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191
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Crossley SWM, Martinez RM, Guevara-Zuluaga S, Shenvi RA. Synthesis of the Privileged 8-Arylmenthol Class by Radical Arylation of Isopulegol. Org Lett 2016; 18:2620-3. [PMID: 27175746 DOI: 10.1021/acs.orglett.6b01047] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Hydrogen atom transfer (HAT) circumvents a disfavored Friedel-Crafts reaction in the derivatization of the inexpensive monoterpene isopulegol. A variety of readily prepared aryl and heteroaryl sulfonates undergo a formal hydroarylation to form 8-arylmenthols, privileged scaffolds for asymmetric synthesis, as typified by 8-phenylmenthol. High stereoselectivity is observed in related systems. This use of HAT significantly extends the chiral pool from the inexpensive monoterpene isopulegol.
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Affiliation(s)
- Steven W M Crossley
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ruben M Martinez
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Sebastián Guevara-Zuluaga
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan A Shenvi
- Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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192
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Landry ML, Hu DX, McKenna GM, Burns NZ. Catalytic Enantioselective Dihalogenation and the Selective Synthesis of (-)-Deschloromytilipin A and (-)-Danicalipin A. J Am Chem Soc 2016; 138:5150-8. [PMID: 27018981 PMCID: PMC4922634 DOI: 10.1021/jacs.6b01643] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A titanium-based catalytic enantioselective dichlorination of simple allylic alcohols is described. This dichlorination reaction provides stereoselective access to all common dichloroalcohol building blocks used in syntheses of chlorosulfolipid natural products. An enantioselective synthesis of ent-(-)-deschloromytilipin A and a concise, eight-step synthesis of ent-(-)-danicalipin A are executed and employ the dichlorination reaction as the first step. Extension of this system to enantioselective dibromination and its use in the synthesis of pentabromide stereoarrays relevant to bromosulfolipids is reported. The described dichlorination and dibromination reactions are capable of exerting diastereocontrol in complex settings allowing X-ray crystal structure analysis of natural and unnatural diastereomers of polyhalogenated stereohexads.
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Affiliation(s)
- Matthew L. Landry
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dennis X. Hu
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Grace M. McKenna
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z. Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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193
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Obradors C, Martinez RM, Shenvi RA. Ph(i-PrO)SiH2: An Exceptional Reductant for Metal-Catalyzed Hydrogen Atom Transfers. J Am Chem Soc 2016; 138:4962-71. [PMID: 26984323 PMCID: PMC4858193 DOI: 10.1021/jacs.6b02032] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report the discovery of an outstanding reductant for metal-catalyzed radical hydrofunctionalization reactions. Observations of unexpected silane solvolysis distributions in the HAT-initiated hydrogenation of alkenes reveal that phenylsilane is not the kinetically preferred reductant in many of these transformations. Instead, isopropoxy(phenyl)silane forms under the reaction conditions, suggesting that alcohols function as important silane ligands to promote the formation of metal hydrides. Study of its reactivity showed that isopropoxy(phenyl)silane is an exceptionally efficient stoichiometric reductant, and it is now possible to significantly decrease catalyst loadings, lower reaction temperatures, broaden functional group tolerance, and use diverse, aprotic solvents in iron- and manganese-catalyzed hydrofunctionalizations. As representative examples, we have improved the yields and rates of alkene reduction, hydration, hydroamination, and conjugate addition. Discovery of this broadly applicable, chemoselective, and solvent-versatile reagent should allow an easier interface with existing radical reactions. Finally, isotope-labeling experiments rule out the alternative hypothesis of hydrogen atom transfer from a redox-active β-diketonate ligand in the HAT step. Instead, initial HAT from a metal hydride to directly generate a carbon-centered radical appears to be the most reasonable hypothesis.
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Affiliation(s)
- Carla Obradors
- Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Ruben M. Martinez
- Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Ryan A. Shenvi
- Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
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194
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Nguyen LQ, Knowles RR. Catalytic C–N Bond-Forming Reactions Enabled by Proton-Coupled Electron Transfer Activation of Amide N–H Bonds. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00486] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Lucas Q. Nguyen
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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195
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Ranieri B, Obradors C, Mato M, Echavarren AM. Synthesis of Rumphellaone A and Hushinone by a Gold-Catalyzed [2 + 2] Cycloaddition. Org Lett 2016; 18:1614-7. [PMID: 26974011 PMCID: PMC4820790 DOI: 10.1021/acs.orglett.6b00473] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantioselective total synthesis of rumphellaone A has been accomplished in 12 steps via a diastereoselective gold(I)-catalyzed [2 + 2] macrocyclization of a 1,10-enyne as the key step to build the cyclobutene moiety. This concise approach has also led to the total synthesis of husinone.
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Affiliation(s)
- Beatrice Ranieri
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Carla Obradors
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Mauro Mato
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology , Av Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili , C/Marcel·li Domingo s/n, 43007 Tarragona, Spain
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196
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Sears JE, Boger DL. Tandem Intramolecular Diels-Alder/1,3-Dipolar Cycloaddition Cascade of 1,3,4-Oxadiazoles: Initial Scope and Applications. Acc Chem Res 2016; 49:241-51. [PMID: 26813287 DOI: 10.1021/acs.accounts.5b00510] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A summary of the development and initial studies on the scope of a powerful tandem intramolecular [4 + 2]/[3 + 2] cycloaddition cascade of 1,3,4-oxadiazoles is detailed and provides the foundation for its subsequent use in organic synthesis. Implemented with substrates in which both the initiating dienophile and subsequent dipolarophile are tethered to the 1,3,4-oxadiazoles, the studies expanded the scope of oxadiazoles that participate in the reaction cascade, permitted the use of differentiated dienophiles and dipolarophiles, extended their use to unsymmetrical dienophiles and dipolarophiles, provided exclusive control of the cycloaddition regioselectivities, and imposed exquisite control on the cycloaddition stereochemistry. As key reactivity and stereochemical features of the reactions were being defined, the cascade cycloaddition reaction was implemented in the total synthesis of a series of alkaloids including (-)-vindoline, (-)-vindorosine, the closely related natural products (+)-4-desacetoxyvindoline and (+)-4-desacetoxyvindorosine, natural minovine, (+)-N-methylaspidospermidine, (+)-spegazzinine, (-)-aspidospermine, and a number of key analogues. Most recently, it was used in the divergent total syntheses of (+)-fendleridine, (-)-kopsinine, (-)-kopsifoline D, and (-)-deoxoapodine, in which four different strategic bonds in four different classes of the hexacyclic alkaloids were formed from a common cascade cycloaddition intermediate. A large number of vindoline analogues were prepared by variations on the cascade cycloaddition reaction for single step incorporation into analogues of vinblastine. These structural changes to vindoline permitted both systematic alterations to the peripheral substituents as well as deep-seated changes to the core structure and embedded functionality of vinblastine not previously accessible. Although explored initially for accessing vindoline and vinblastine, the use of the cycloaddition cascade in the total synthesis of an impressive range of additional natural products illustrate the power of the methodology. Alternative tethering strategies for the cascade cycloaddition reaction, combined intramolecular and intermolecular variants of either the initiating Diels-Alder reaction or the subsequent carbonyl ylide 1,3-dipolar cycloaddition, an expanded examination of the tethered dipolarophile scope, and applications to additional natural product classes represent attractive areas for future work.
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Affiliation(s)
- Justin E. Sears
- Department
of Chemistry and
the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Dale L. Boger
- Department
of Chemistry and
the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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197
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Gan P, Smith MW, Braffman NR, Snyder SA. Pyrone Diels-Alder Routes to Indolines and Hydroindolines: Syntheses of Gracilamine, Mesembrine, and Δ7-Mesembrenone. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510520] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pei Gan
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Myles W. Smith
- Dept. of Chemistry; Columbia University; 3000 Broadway New York NY 10027 USA
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | | | - Scott A. Snyder
- Dept. of Chemistry; Columbia University; 3000 Broadway New York NY 10027 USA
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
- Dept. of Chemistry; The University of Chicago; 5735 South Ellis Avenue Chicago IL 60637 USA
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198
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Gan P, Smith MW, Braffman NR, Snyder SA. Pyrone Diels-Alder Routes to Indolines and Hydroindolines: Syntheses of Gracilamine, Mesembrine, and Δ7-Mesembrenone. Angew Chem Int Ed Engl 2016; 55:3625-30. [DOI: 10.1002/anie.201510520] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Indexed: 01/04/2023]
Affiliation(s)
- Pei Gan
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | - Myles W. Smith
- Dept. of Chemistry; Columbia University; 3000 Broadway New York NY 10027 USA
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
| | | | - Scott A. Snyder
- Dept. of Chemistry; Columbia University; 3000 Broadway New York NY 10027 USA
- Dept. of Chemistry; The Scripps Research Institute; 130 Scripps Way Jupiter FL 33458 USA
- Dept. of Chemistry; The University of Chicago; 5735 South Ellis Avenue Chicago IL 60637 USA
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199
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Liu W, Li H, Cai PJ, Wang Z, Yu ZX, Lei X. Scalable Total Synthesis of rac
-Jungermannenones B and C. Angew Chem Int Ed Engl 2016; 55:3112-6. [DOI: 10.1002/anie.201511659] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Weilong Liu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Houhua Li
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Pei-Jun Cai
- College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Zhen Wang
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Zhi-Xiang Yu
- College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
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200
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Liu W, Li H, Cai PJ, Wang Z, Yu ZX, Lei X. Scalable Total Synthesis of rac
-Jungermannenones B and C. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511659] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Weilong Liu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Houhua Li
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Pei-Jun Cai
- College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Zhen Wang
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
| | - Zhi-Xiang Yu
- College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; Department of Chemical Biology, College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center; Peking-Tsinghua Center for Life Sciences; Peking University; Beijing 100871 China
- National Institute of Biological Sciences (NIBS); Beijing 102206 China
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