201
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Ni S, Padial NM, Kingston C, Vantourout JC, Schmitt DC, Edwards JT, Kruszyk MM, Merchant RR, Mykhailiuk PK, Sanchez BB, Yang S, Perry MA, Gallego GM, Mousseau JJ, Collins MR, Cherney RJ, Lebed PS, Chen JS, Qin T, Baran PS. A Radical Approach to Anionic Chemistry: Synthesis of Ketones, Alcohols, and Amines. J Am Chem Soc 2019; 141:6726-6739. [PMID: 30943023 DOI: 10.1021/jacs.9b02238] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Historically accessed through two-electron, anionic chemistry, ketones, alcohols, and amines are of foundational importance to the practice of organic synthesis. After placing this work in proper historical context, this Article reports the development, full scope, and a mechanistic picture for a strikingly different way of forging such functional groups. Thus, carboxylic acids, once converted to redox-active esters (RAEs), can be utilized as formally nucleophilic coupling partners with other carboxylic derivatives (to produce ketones), imines (to produce benzylic amines), or aldehydes (to produce alcohols). The reactions are uniformly mild, operationally simple, and, in the case of ketone synthesis, broad in scope (including several applications to the simplification of synthetic problems and to parallel synthesis). Finally, an extensive mechanistic study of the ketone synthesis is performed to trace the elementary steps of the catalytic cycle and provide the end-user with a clear and understandable rationale for the selectivity, role of additives, and underlying driving forces involved.
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Affiliation(s)
- Shengyang Ni
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Natalia M Padial
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Cian Kingston
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Julien C Vantourout
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Daniel C Schmitt
- Pfizer Medicinal Sciences , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Jacob T Edwards
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Monika M Kruszyk
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Rohan R Merchant
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Pavel K Mykhailiuk
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States.,Enamine Ltd. , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,Chemistry Department , Taras Shevchenko National University of Kyiv , Volodymyrska 64 , 01601 Kyiv , Ukraine
| | - Brittany B Sanchez
- Automated Synthesis Facility , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Shouliang Yang
- Department of Chemistry , La Jolla Laboratories , Pfizer 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Matthew A Perry
- Pfizer Medicinal Sciences , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Gary M Gallego
- Department of Chemistry , La Jolla Laboratories , Pfizer 10770 Science Center Drive , San Diego , California 92121 , United States
| | - James J Mousseau
- Pfizer Medicinal Sciences , Eastern Point Road , Groton , Connecticut 06340 , United States
| | - Michael R Collins
- Department of Chemistry , La Jolla Laboratories , Pfizer 10770 Science Center Drive , San Diego , California 92121 , United States
| | - Robert J Cherney
- Research & Development , Bristol-Myers Squibb Company , Rt. 206 & Province Line Road , Princeton , New Jersey 08543 , United States
| | - Pavlo S Lebed
- Enamine Ltd. , Chervonotkatska 78 , 02094 Kyiv , Ukraine.,ChemBioCenter , Taras Shevchenko National University of Kyiv , Volodymyrska 64 , 01601 Kyiv , Ukraine
| | - Jason S Chen
- Automated Synthesis Facility , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Tian Qin
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Phil S Baran
- Department of Chemistry , Scripps Research , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
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202
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203
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Xie Y, Sun P, Li Y, Wang S, Ye M, Li Z. Ligand‐Promoted Iron(III)‐Catalyzed Hydrofluorination of Alkenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yongtao Xie
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Peng‐Wei Sun
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Yuxin Li
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Siwei Wang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Zhengming Li
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
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204
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Xie Y, Sun PW, Li Y, Wang S, Ye M, Li Z. Ligand-Promoted Iron(III)-Catalyzed Hydrofluorination of Alkenes. Angew Chem Int Ed Engl 2019; 58:7097-7101. [PMID: 30891881 DOI: 10.1002/anie.201902607] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Indexed: 11/09/2022]
Abstract
An iron-catalyzed hydrofluorination of unactivated alkenes has been developed. The use of a multidentate ligand and the fluorination reagent N-fluorobenzenesulfonimide (NFSI) proved to be critical for this reaction, which afforded various fluorinated compounds in up to 94 % yield.
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Affiliation(s)
- Yongtao Xie
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Peng-Wei Sun
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yuxin Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Siwei Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Zhengming Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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205
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Liu S, Shen T, Luo Z, Liu ZQ. A free radical alkylation of quinones with olefins. Chem Commun (Camb) 2019; 55:4027-4030. [PMID: 30882129 DOI: 10.1039/c9cc01704f] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrated herein an Fe(iii)-mediated radical alkylation of quinones. A wide range of bioactive molecules with quinone motifs can be rapidly synthesized by using readily available and inexpensive NaBH4/NaBD4 with alkenes at room temperature under open flask conditions.
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Affiliation(s)
- Shuai Liu
- College of Chemical Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, P. R. China
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206
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Evano G, Theunissen C. Jenseits von Friedel und Crafts: immanente Alkylierung von C‐H‐Bindungen in Arenen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201806631] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
| | - Cédric Theunissen
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
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207
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Pitre SP, Muuronen M, Fishman DA, Overman LE. Tertiary Alcohols as Radical Precursors for the Introduction of Tertiary Substituents into Heteroarenes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00405] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Spencer P. Pitre
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Mikko Muuronen
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Larry E. Overman
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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208
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Park Y, Koga Y, Su C, Waterbury AL, Johnny CL, Liau BB. Versatile Synthetic Route to Cycloheximide and Analogues That Potently Inhibit Translation Elongation. Angew Chem Int Ed Engl 2019; 58:5387-5391. [PMID: 30802354 DOI: 10.1002/anie.201901386] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Indexed: 02/05/2023]
Abstract
Cycloheximide (CHX) is an inhibitor of eukaryotic translation elongation that has played an essential role in the study of protein synthesis. Despite its ubiquity, few studies have been directed towards accessing synthetic CHX derivatives, even though such efforts may lead to protein synthesis inhibitors with improved or alternate properties. Described here is the total synthesis of CHX and analogues, and the establishment of structure-activity relationships (SAR) responsible for translation inhibition. The SAR studies aided the design of more potent compounds, one of which irreversibly blocks ribosomal elongation, preserves polysome profiles, and may be a broadly useful tool for investigating protein synthesis.
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Affiliation(s)
- Yongho Park
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Yumi Koga
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Cindy Su
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Amanda L Waterbury
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Christopher L Johnny
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Brian B Liau
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
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209
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Park Y, Koga Y, Su C, Waterbury AL, Johnny CL, Liau BB. Versatile Synthetic Route to Cycloheximide and Analogues That Potently Inhibit Translation Elongation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yongho Park
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Yumi Koga
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Cindy Su
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Amanda L. Waterbury
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Christopher L. Johnny
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Brian B. Liau
- Department of Chemistry and Chemical BiologyHarvard University 12 Oxford Street Cambridge MA 02138 USA
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210
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van der Vlugt JI. Radical-Type Reactivity and Catalysis by Single-Electron Transfer to or from Redox-Active Ligands. Chemistry 2019; 25:2651-2662. [PMID: 30084211 PMCID: PMC6471147 DOI: 10.1002/chem.201802606] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Indexed: 12/12/2022]
Abstract
Controlled ligand-based redox-activity and chemical non-innocence are rapidly gaining importance for selective (catalytic) processes. This Concept aims to provide an overview of the progress regarding ligand-to-substrate single-electron transfer as a relatively new mode of operation to exploit ligand-centered reactivity and catalysis based thereon.
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Affiliation(s)
- Jarl Ivar van der Vlugt
- Bio-Inspired Homogeneous and Supramolecular Catalysis Groupvan ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamNetherlands
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211
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Zhang M, Yang L, Tian C, Zhou M, An G, Li G. A hydrate salt-promoted reductive coupling reaction of nitrodienes with unactivated alkenes. Org Biomol Chem 2019; 17:2258-2264. [PMID: 30724308 DOI: 10.1039/c9ob00136k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Transition metal-catalyzed reductive coupling has emerged as a powerful method for the construction of C-C bonds. Herein, a crystalline hydrate, Na2HPO4·7H2O, has been disclosed as an effective promoter for the reductive coupling of nitrodienes with unactivated alkenes to afford diverse dienes with various functionalities in an open-flask manner. The mechanism study has revealed that Na2HPO4·7H2O accelerates the in situ generation of active silane PhSi(OEt)H2 and prevents the deactivation of catalyst. The approach can increase the efficiency of previous reductive coupling reactions as well.
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Affiliation(s)
- Mengmeng Zhang
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, No. 74, Xuefu Road, Nangang District, Harbin 150080, P. R. China.
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212
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Das M, Vu MD, Zhang Q, Liu XW. Metal-free visible light photoredox enables generation of carbyne equivalents via phosphonium ylide C-H activation. Chem Sci 2019; 10:1687-1691. [PMID: 30842832 PMCID: PMC6368212 DOI: 10.1039/c8sc04195d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/23/2018] [Indexed: 12/12/2022] Open
Abstract
Carbyne, an interesting synthetic intermediate, has recently been generated from hypervalent iodine precursors via photoredox catalysis. Given the underexplored chemistry of carbyne, due to the paucity of carbyne sources, we are intrigued to discover a new source for this reactive species from classical reagents - phosphonium ylides. Our novel strategy employing phosphonium ylides in an olefin hydrocarbonation reaction features a facile approach for constructing carbon-carbon bonds through metal-free and benign reaction conditions. Moreover, the hydrocarbonation products were delivered in a highly regioselective manner.
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Affiliation(s)
- Mrinmoy Das
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
| | - Minh Duy Vu
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
| | - Qi Zhang
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
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213
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Pitre SP, Weires NA, Overman LE. Forging C(sp 3)-C(sp 3) Bonds with Carbon-Centered Radicals in the Synthesis of Complex Molecules. J Am Chem Soc 2019; 141:2800-2813. [PMID: 30566838 DOI: 10.1021/jacs.8b11790] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Radical fragment coupling reactions that unite intricate subunits have become an important class of transformations within the arena of complex molecule synthesis. This Perspective highlights some of the early contributions in this area, as well as more modern applications of radical fragment couplings in the preparation of natural products. Additionally, emphasis is placed on contemporary advances that allow for radical generation under mild conditions as a driving force for the implementation of radical fragment couplings in total synthesis.
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Affiliation(s)
- Spencer P Pitre
- Department of Chemistry , University of California, Irvine , Irvine , California 92697-2025 , United States
| | - Nicholas A Weires
- Department of Chemistry , University of California, Irvine , Irvine , California 92697-2025 , United States
| | - Larry E Overman
- Department of Chemistry , University of California, Irvine , Irvine , California 92697-2025 , United States
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214
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Qi J, Tang H, Chen C, Cui S, Xu G. Reductive coupling of alkenes with unsaturated imines via a radical pathway. Org Chem Front 2019. [DOI: 10.1039/c9qo00653b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A reductive coupling of alkenes with unsaturated imines via a radical pathway is described.
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Affiliation(s)
- Jifeng Qi
- Institute of Drug Discovery and Design
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- China
| | - Haibin Tang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
| | - Changwei Chen
- Institute of Drug Discovery and Design
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- China
| | - Sunliang Cui
- Institute of Drug Discovery and Design
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- China
| | - Gang Xu
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
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215
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Lear JM, Buquoi JQ, Gu X, Pan K, Mustafa DN, Nagib DA. Multi-component heteroarene couplings via polarity-reversed radical cascades. Chem Commun (Camb) 2019; 55:8820-8823. [PMID: 31134975 DOI: 10.1039/c9cc03498f] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A multi-component radical addition strategy enables difunctionalization of alkenes with heteroarenes and a variety of radical precursors, including N3, P(O)R2, and CF3. This unified approach for coupling diverse classes of electrophilic radicals and heteroarenes to vinyl ethers allows for direct, vicinal C-C as well as C-N, C-P, and C-Rf bond formation.
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Affiliation(s)
- Jeremy M Lear
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210, USA.
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216
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Qin Q, Wang W, Zhang C, Song S, Jiao N. A metal-free desulfurizing radical reductive C–C coupling of thiols and alkenes. Chem Commun (Camb) 2019; 55:10583-10586. [PMID: 31418430 DOI: 10.1039/c9cc05378f] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An intermolecular reductive C–C coupling of electrophilic alkyl radicals and alkenes has been developed.
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Affiliation(s)
- Qixue Qin
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Weijing Wang
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Cheng Zhang
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
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217
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Zhao H, Li Z, Jin J. Green oxidant H2O2 as a hydrogen atom transfer reagent for visible light-mediated Minisci reaction. NEW J CHEM 2019. [DOI: 10.1039/c9nj03106e] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A metal-free protocol for oxidative coupling of heteroarenes and aliphatic C–H components has been achieved via a radical pathway.
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Affiliation(s)
- Hong Zhao
- 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
| | - Zhenlong Li
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Jian Jin
- 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
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218
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Dong J, Wang X, Wang Z, Song H, Liu Y, Wang Q. Visible-light-initiated manganese-catalyzed Giese addition of unactivated alkyl iodides to electron-poor olefins. Chem Commun (Camb) 2019; 55:11707-11710. [DOI: 10.1039/c9cc06400a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Visible-light-initiated Giese addition of unactivated alkyl iodides to electron-poor olefins with catalysis by decacarbonyl dimanganese, Mn2(CO)10 was reported.
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Affiliation(s)
- Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Xiaochen Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Zhen Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
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219
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Xia XF, He W, Zhang GW, Wang D. Iron-catalyzed reductive cyclization reaction of 1,6-enynes for the synthesis of 3-acylbenzofurans and thiophenes. Org Chem Front 2019. [DOI: 10.1039/c8qo01190g] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile synthesis of 3-acylbenzofurans and thiophenes via iron(ii)-catalyzed reductive cyclization of 1,6-enynes has been developed.
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Affiliation(s)
- Xiao-Feng Xia
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Wei He
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Guo-Wei Zhang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
| | - Dawei Wang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
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220
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Larionov VA, Stoletova NV, Kovalev VI, Smol'yakov AF, Savel'yeva TF, Maleev VI. A general synthesis of unnatural α-amino acids by iron-catalysed olefin–olefin coupling via generated radicals. Org Chem Front 2019. [DOI: 10.1039/c9qo00108e] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general protocol for the asymmetric synthesis of unnatural α-amino acids with γ-tertiary and quaternary carbon centers via generated radicals is reported.
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Affiliation(s)
- Vladimir A. Larionov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
- Department of Inorganic Chemistry
- Peoples’ Friendship University of Russia (RUDN University)
| | - Nadezhda V. Stoletova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Vladislav I. Kovalev
- Dmitry Mendeleev University of Chemical Technology of Russia
- 125047 Moscow
- Russian Federation
| | - Alexander F. Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
- Plekhanov Russian University of Economics
- 117997 Moscow
| | - Tat'yana F. Savel'yeva
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Victor I. Maleev
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
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221
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Xu R, Cai C. Three-component difluoroalkylamination of alkenes mediated by photoredox and iron cooperative catalysis. Org Biomol Chem 2019; 17:8541-8545. [DOI: 10.1039/c9ob01815h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A new three-component difluoroalkylamination of alkenes mediated by photoredox and iron cooperative catalysis has been developed with a broad substrate scope.
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Affiliation(s)
- Rui Xu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
| | - Chun Cai
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
- Key Laboratory of Organofluorine Chemistry
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222
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Dong J, Wang X, Wang Z, Song H, Liu Y, Wang Q. Metal-, photocatalyst-, and light-free late-stage C–H alkylation of N-heteroarenes with organotrimethylsilanes using persulfate as a stoichiometric oxidant. Org Chem Front 2019. [DOI: 10.1039/c9qo00690g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Minisci C–H alkylation of N-heteroarenes with readily available benzylsilanes and heteroatom substituted silanes was developed.
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Affiliation(s)
- Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Xiaochen Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Zhen Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- People's Republic of China
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223
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Touney EE, Foy NJ, Pronin SV. Catalytic Radical–Polar Crossover Reactions of Allylic Alcohols. J Am Chem Soc 2018; 140:16982-16987. [DOI: 10.1021/jacs.8b12075] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Eric E. Touney
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Nicholas J. Foy
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Sergey V. Pronin
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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224
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Eshon J, Gerstner NC, Schomaker JM. Oxidative allene amination for the synthesis of nitrogen-containing heterocycles. ARKIVOC 2018; 2018:204-233. [PMID: 31903453 PMCID: PMC6941799 DOI: 10.24820/ark.5550190.p010.670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The prevalence of stereochemically complex amines in natural products, pharmaceuticals and other bioactive compounds, coupled with the challenges inherent in their preparation, has inspired our work to develop new and versatile methodologies for the synthesis of amine-containing stereotriads ('triads'). The key step is a highly chemo-, regio-, and stereoselective transition-metal catalyzed nitrene transfer reaction that transforms one of the cumulated double bonds of an allene precursor into a bicyclic methyleneaziridine intermediate. This account summarizes our strategies to rapidly elaborate such intermediates into stereochemically rich, densely functionalized amine triads, nitrogen heterocycles, aminated carbocycles and other useful synthetic building blocks.
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Affiliation(s)
- Josephine Eshon
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
| | - Nels C Gerstner
- Department of Chemistry, 1101 University Avenue, Madison, WI 53706, U.S.A
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225
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Sasaki M, Iwasaki K, Arai K. Studies toward the Total Synthesis of Caribbean Ciguatoxin C-CTX-1: Synthesis of the LMN-Ring Fragment through Reductive Olefin Cross-Coupling. Org Lett 2018; 20:7163-7166. [PMID: 30362358 DOI: 10.1021/acs.orglett.8b03102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Synthesis of the LMN-ring fragment of Caribbean ciguatoxin C-CTX-1, the principal causative toxin for ciguatera fish poisoning around the Caribbean Sea areas, is described. The key feature of the synthesis is the stereoselective introduction of an angular methyl group on the sterically encumbered seven-membered M-ring by the application of a hydrogen atom transfer-based reductive olefin coupling.
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Affiliation(s)
- Makoto Sasaki
- Graduate School of Life Sciences , Tohoku University , 2-1-1 Katahira, Aoba-ku , Sendai 980-8577 , Japan
| | - Kotaro Iwasaki
- Graduate School of Life Sciences , Tohoku University , 2-1-1 Katahira, Aoba-ku , Sendai 980-8577 , Japan
| | - Keisuke Arai
- Graduate School of Life Sciences , Tohoku University , 2-1-1 Katahira, Aoba-ku , Sendai 980-8577 , Japan
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226
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Tanaka Y, Kubosaki S, Osaka K, Yamawaki M, Morita T, Yoshimi Y. Two Types of Cross-Coupling Reactions between Electron-Rich and Electron-Deficient Alkenes Assisted by Nucleophilic Addition Using an Organic Photoredox Catalyst. J Org Chem 2018; 83:13625-13635. [PMID: 30176147 DOI: 10.1021/acs.joc.8b02025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two types of photoreactions between electronically differentiated donor and acceptor alkenes assisted by nucleophilic addition using an organic photoredox catalyst efficiently afforded 1:1 or 2:1 cross-coupling adducts. A variety of alkenes and alcohols were employed in the photoreaction. Control of the reaction pathway (i.e., the formation of the 1:1 or 2:1 adduct) was achieved by varying the concentration of the alcohol used. Detailed mechanistic studies suggested that the organic photoredox catalyst acts as an effective electron mediator to promote the formation of the cross-coupling adducts.
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Affiliation(s)
- Yosuke Tanaka
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
| | - Suzuka Kubosaki
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
| | - Kazuyuki Osaka
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
| | - Mugen Yamawaki
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
| | - Toshio Morita
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
| | - Yasuharu Yoshimi
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
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227
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Turner OJ, Murphy JA, Hirst DJ, Talbot EPA. Hydrogen Atom Transfer-Mediated Cyclisations of Nitriles. Chemistry 2018; 24:18658-18662. [PMID: 30341926 DOI: 10.1002/chem.201805236] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Indexed: 01/06/2023]
Abstract
Hydrogen atom transfer-mediated intramolecular C-C coupling reactions between alkenes and nitriles, using PhSiH3 and catalytic Fe(acac)3 , are described. This introduces a new strategic bond disconnection for ring-closing reactions, forming ketones via imine intermediates. Of note is the scope of the reaction, including formation of sterically hindered ketones, spirocycles and fused cyclic systems.
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Affiliation(s)
- Oliver J Turner
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK.,Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - John A Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - David J Hirst
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK
| | - Eric P A Talbot
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, UK.,Present address: Pharmaron, Hertford Rd, Hoddesdon, EN11 9BU, UK
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228
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Saladrigas M, Loren G, Bonjoch J, Bradshaw B. Hydrogen Atom Transfer (HAT)-Triggered Iron-Catalyzed Intra- and Intermolecular Coupling of Alkenes with Hydrazones: Access to Complex Amines. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03794] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mar Saladrigas
- Laboratori de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain
| | - Guillem Loren
- 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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229
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Mahajan A, Bhattacharya SK, Rochat S, Burrows AD, Fletcher PJ, Rong Y, Dalton AB, McKeown NB, Marken F. Polymer of Intrinsic Microporosity (PIM‐7) Coating Affects Triphasic Palladium Electrocatalysis. ChemElectroChem 2018. [DOI: 10.1002/celc.201801359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ankita Mahajan
- Department of ChemistryUniversity of Bath Claverton Down BA2 7AY UK
- Physical Chemistry Section Department of ChemistryJadavpur University Kolkata 700032 India
| | - Swapan K. Bhattacharya
- Physical Chemistry Section Department of ChemistryJadavpur University Kolkata 700032 India
| | - Sébastien Rochat
- Department of ChemistryUniversity of Bath Claverton Down BA2 7AY UK
| | | | - Philip J. Fletcher
- Materials and Chemical Characterisation Facility (MC2)University of Bath Claverton Down BA2 7AY UK
| | - Yuanyang Rong
- School of Physics and AstronomyUniversity of Sussex Brighton BN1 9RH UK
| | - Alan B. Dalton
- School of Physics and AstronomyUniversity of Sussex Brighton BN1 9RH UK
| | - Neil B. McKeown
- School of ChemistryUniversity of Edinburgh Joseph Black Building West Mains Road Edinburgh Scotland EH9 3JJ, UK
| | - Frank Marken
- Department of ChemistryUniversity of Bath Claverton Down BA2 7AY UK
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230
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Wu X, Hao W, Ye KY, Jiang B, Pombar G, Song Z, Lin S. Ti-Catalyzed Radical Alkylation of Secondary and Tertiary Alkyl Chlorides Using Michael Acceptors. J Am Chem Soc 2018; 140:14836-14843. [PMID: 30303379 PMCID: PMC6530901 DOI: 10.1021/jacs.8b08605] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Alkyl chlorides are common functional groups in synthetic organic chemistry. However, the engagement of unactivated alkyl chlorides, especially tertiary alkyl chlorides, in transition-metal-catalyzed C-C bond formation remains challenging. Herein, we describe the development of a TiIII-catalyzed radical addition of 2° and 3° alkyl chlorides to electron-deficient alkenes. Mechanistic data are consistent with inner-sphere activation of the C-Cl bond featuring TiIII-mediated Cl atom abstraction. Evidence suggests that the active TiIII catalyst is generated from the TiIV precursor in a Lewis-acid-assisted electron transfer process.
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Affiliation(s)
- Xiangyu Wu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | | | - Ke-Yin Ye
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Binyang Jiang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Gisselle Pombar
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Zhidong Song
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Song Lin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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231
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Maxwell BD. New radical methods for the potential synthesis of carbon-13 and carbon-14 labeled complex products. J Labelled Comp Radiopharm 2018; 61:1024-1035. [DOI: 10.1002/jlcr.3680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 08/10/2018] [Accepted: 08/14/2018] [Indexed: 01/03/2023]
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232
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Godfrey NA, Schatz DJ, Pronin SV. Twelve-Step Asymmetric Synthesis of (-)-Nodulisporic Acid C. J Am Chem Soc 2018; 140:12770-12774. [PMID: 30261724 PMCID: PMC6791361 DOI: 10.1021/jacs.8b09965] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A short, enantioselective synthesis of (-)-nodulisporic acid C is described. The route features two highly diastereoselective polycyclizations en route to the terpenoid core and the indenopyran fragment and a highly convergent assembly of a challenging indole moiety. Application of this chemistry allows for a 12-step synthesis of the target indoloterpenoid from commercially available material.
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Affiliation(s)
- Nicole A. Godfrey
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Devon J. Schatz
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Sergey V. Pronin
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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233
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234
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Abstract
A simple method to transform sulfones into nitrones and therefore into the corresponding carbonyl derivatives has been developed. Some examples demonstrate that it is a new reliable and versatile reaction in the toolbox of sulfones that has great synthetic potential. NMR and computational studies were used to elucidate the mechanism.
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Affiliation(s)
- Eduardo Rodrigo
- Department of Organic Chemistry , Universidad Autónoma de Madrid , Cantoblanco 28049 , Madrid , Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem) , Universidad Autónoma de Madrid , Madrid 28049 , Spain
| | - Inés Alonso
- Department of Organic Chemistry , Universidad Autónoma de Madrid , Cantoblanco 28049 , Madrid , Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem) , Universidad Autónoma de Madrid , Madrid 28049 , Spain
| | - M Belén Cid
- Department of Organic Chemistry , Universidad Autónoma de Madrid , Cantoblanco 28049 , Madrid , Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem) , Universidad Autónoma de Madrid , Madrid 28049 , Spain
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235
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Green SA, Vásquez-Céspedes S, Shenvi RA. Iron-Nickel Dual-Catalysis: A New Engine for Olefin Functionalization and the Formation of Quaternary Centers. J Am Chem Soc 2018; 140:11317-11324. [PMID: 30048124 PMCID: PMC6245942 DOI: 10.1021/jacs.8b05868] [Citation(s) in RCA: 135] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Alkene hydroarylation forms carbon-carbon bonds between two foundational building blocks of organic chemistry: olefins and aromatic rings. In the absence of electronic bias or directing groups, only the Friedel-Crafts reaction allows arenes to engage alkenes with Markovnikov selectivity to generate quaternary carbons. However, the intermediacy of carbocations precludes the use of electron-deficient arenes, including Lewis basic heterocycles. Here we report a highly Markovnikov-selective, dual-catalytic olefin hydroarylation that tolerates arenes and heteroarenes of any electronic character. Hydrogen atom transfer controls the formation of branched products and arene halogenation specifies attachment points on the aromatic ring. Mono-, di-, tri-, and tetra-substituted alkenes yield Markovnikov products including quaternary carbons within nonstrained rings.
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Affiliation(s)
- Samantha A. Green
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Suhelen Vásquez-Céspedes
- 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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236
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Abstract
The first catalytic strategy to harness imidate radicals has been developed. This approach enables alkene difunctionalization of allyl alcohols by photocatalytic reduction of their oxime imidates. The ensuing imidate radicals undergo consecutive intra- and intermolecular reactions to afford (i) hydroamination, (ii) aminoalkylation, or (iii) aminoarylation, via three distinct radical mechanisms. The broad scope and utility of this catalytic method for imidate radical reactivity is presented, along with comparisons to other N-centered radicals and complementary, closed-shell imidate pathways.
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Affiliation(s)
- Kohki M Nakafuku
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Stacy C Fosu
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - David A Nagib
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
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237
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Ma X, Herzon SB. Cobalt bis(acetylacetonate)- tert-butyl hydroperoxide-triethylsilane: a general reagent combination for the Markovnikov-selective hydrofunctionalization of alkenes by hydrogen atom transfer. Beilstein J Org Chem 2018; 14:2259-2265. [PMID: 30202480 PMCID: PMC6122341 DOI: 10.3762/bjoc.14.201] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/19/2018] [Indexed: 01/20/2023] Open
Abstract
We show that cobalt bis(acetylacetonate) [Co(acac)2], tert-butyl hydroperoxide (TBHP), and triethylsilane (Et3SiH) constitute an inexpensive, general, and practical reagent combination to initiate a broad range of Markovnikov-selective alkene hydrofunctionalization reactions. These transformations are believed to proceed by cobalt-mediated hydrogen atom transfer (HAT) to the alkene substrate, followed by interception of the resulting alkyl radical intermediate with a SOMOphile. In addition, we report the first reductive couplings of unactivated alkenes and aryldiazonium salts by an HAT pathway. The simplicity and generality of the Co(acac)2–TBHP–Et3SiH reagent combination suggests it as a useful starting point to develop HAT reactions in complex settings.
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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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238
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Lu Z, Zhang X, Guo Z, Chen Y, Mu T, Li A. Total Synthesis of Aplysiasecosterol A. J Am Chem Soc 2018; 140:9211-9218. [PMID: 29939021 DOI: 10.1021/jacs.8b05070] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Aplysiasecosterol A (1) is a structurally unusual 9,11-secosteroid isolated from the sea hare Aplysia kurodai. We have accomplished the first and asymmetric total synthesis of 1 in a convergent fashion. The left-hand segment bearing three adjacent stereocenters was constructed through desymmetrizing reduction, ketalization, and radical cyclization. A strategy of asymmetric 2-bromoallylation followed by spontaneous desymmetrizing lactolization enabled a more expeditious access to this segment. The right-hand segment was prepared through two different approaches: one featuring Myers alkylation and Suzuki-Miyaura coupling and the other relying upon Aggarwal lithiation-borylation and Zweifel-Evans olefination. The two fragments were coupled by a Reformatsky type reaction. The three consecutive stereocenters embedded in the central domain of 1 were generated by an iron-mediated, hydrogen atom transfer based radical cyclization reaction.
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Affiliation(s)
- Zhaohong Lu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Xiang Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Zhicong Guo
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Yu Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Tong Mu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis , Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , China
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239
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Povie G, Suravarapu SR, Bircher MP, Mojzes MM, Rieder S, Renaud P. Radical chain repair: The hydroalkylation of polysubstituted unactivated alkenes. SCIENCE ADVANCES 2018; 4:eaat6031. [PMID: 30035230 PMCID: PMC6054511 DOI: 10.1126/sciadv.aat6031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
The concept of repair is widely used by nature to heal molecules such as proteins, lipids, sugars, and DNA that are damaged by hydrogen atom abstraction resulting from oxidative stress. We show that this strategy, rather undocumented in the field of synthetic organic chemistry, can be used in a radical chain reaction to enable notoriously intractable transformations. By overcoming the radical chain inhibitor properties of substituted alkenes, the radical-mediated hydroalkylation of mono-, di-, tri-, and even tetrasubstituted unactivated olefins could be performed under mild conditions. With a remarkable functional group tolerance, this reaction provides a general coupling method for the derivatization of olefin-containing natural products.
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240
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Jian H, Wang Q, Wang WH, Li ZJ, Gu CZ, Dai B, He L. Divergent synthesis of functionalized thioethers via multicomponent reaction of benzynes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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241
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Huang JK, Yang Lauderdale TL, Lin CC, Shia KS. Total Synthesis of Tetarimycin A, (±)-Naphthacemycin A 9, and (±)-Fasamycin A: Structure-Activity Relationship Studies against Drug-Resistant Bacteria. J Org Chem 2018; 83:6508-6523. [PMID: 29785848 DOI: 10.1021/acs.joc.8b00802] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Making use of a reductive olefin coupling reaction and Michael-Dieckmann condensation as two key operations, we have completed a concise total synthesis of tetarimycin A, (±)-naphthacemycin A9, and (±)-fasamycin A in a highly convergent and practical protocol. Synthetic procedures thus developed have also been applied to provide related analogues for structure-activity relationship studies, thereby coming to the conclusion that the free hydroxyl group at C-10 is essential for exerting inhibitory activities against a panel of Gram-positive bacteria, including drug-resistant strains VRE and MRSA.
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Affiliation(s)
- Jing-Kai Huang
- Department of Chemistry , National Tsing Hua University , Hsinchu 30013 , Taiwan, R.O.C
| | | | - Chun-Cheng Lin
- Department of Chemistry , National Tsing Hua University , Hsinchu 30013 , Taiwan, R.O.C
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242
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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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243
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Olafsen BE, Crescenzo GV, Moisey LP, Patrick BO, Smith KM. Photolytic Reactivity of Organometallic Chromium Bipyridine Complexes. Inorg Chem 2018; 57:9611-9621. [PMID: 29461816 DOI: 10.1021/acs.inorgchem.7b03195] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Known stable [Cr(bpy)2(Ph)2](BPh4) complexes undergo reductive elimination of biphenyl with visible-light photolysis using household incandescent or compact fluorescent light bulbs. A series of [Cr(R-bpy)2(Ar)2](X) complexes (R = H or CMe3; Ar = Ph, C6H4-CMe3, or C6H4-OMe; X = I, BPh4, or PF6) were prepared, and the effect of varying the bipyridine and aryl ligands on the UV-visible spectra and electrochemistry of the chromium(III) complexes was investigated. Photolysis of a mixture of two different bis(aryl) complexes gave only the homocoupled biaryl products by 1H NMR and gas chromatography/mass spectrometry analysis. The initial product of photoinduced reductive elimination of [Cr(bpy)2(Ar)2](PF6) was trapped with bipyridine to generate [Cr(bpy)3](PF6) and with benzoyl peroxide to form [Cr(bpy)2(O2CPh)2](PF6). The latter chromium(III) bis(benzoate) complex was also synthesized by the addition of bipyridine and PhCO2H to Cp2Cr, followed by air oxidation. The neutral Cr(bpy)(S2CNMe2)Ph2 complex also generated biphenyl upon visible-light photolysis. While the treatment of Cr(tBu-bpy)(dpm)Cl2 [dpm = (OCtBu)2CH] with AgO2CPh gave trans-Cr(tBu-bpy)(dpm)(O2CPh)2, reaction of the dichloro precursor with PhMgCl produced anionic [Cr(tBu-bpy)Ph3]- with [Mg(dpm)(THF)4]+ as the countercation, with both complexes characterized by single-crystal X-ray diffraction. Protonolysis of Cr(bpy)Ph3(THF) with 8-hydroxyquinoline produced Cr(bpy)(quin)Ph2, which generated biphenyl under visible-light photolysis, and the initial product of reductive elimination was trapped by bipyridine or benzoyl peroxide. A related Cr(bpy)(quin)2 complex was synthesized by protonolysis of Cr(bpy)[N(SiMe3)2]2 and characterized by single-crystal X-ray diffraction.
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Affiliation(s)
- Benjamin E Olafsen
- Department of Chemistry , University of British Columbia, Okanagan , 3247 University Way , Kelowna , British Columbia V1V 1V7 , Canada
| | - Giuseppe V Crescenzo
- Department of Chemistry , University of British Columbia, Okanagan , 3247 University Way , Kelowna , British Columbia V1V 1V7 , Canada
| | - Luke P Moisey
- Department of Chemistry , University of British Columbia, Okanagan , 3247 University Way , Kelowna , British Columbia V1V 1V7 , Canada
| | - Brian O Patrick
- Department of Chemistry , University of British Columbia, Vancouver , Vancouver , British Columbia V6T 1Z21 , Canada
| | - Kevin M Smith
- Department of Chemistry , University of British Columbia, Okanagan , 3247 University Way , Kelowna , British Columbia V1V 1V7 , Canada
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244
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Merchant RR, Edwards JT, Qin T, Kruszyk MM, Bi C, Che G, Bao DH, Qiao W, Sun L, Collins MR, Fadeyi OO, Gallego GM, Mousseau JJ, Nuhant P, Baran PS. Modular radical cross-coupling with sulfones enables access to sp 3-rich (fluoro)alkylated scaffolds. Science 2018; 360:75-80. [PMID: 29456201 DOI: 10.1126/science.aar7335] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/08/2018] [Indexed: 12/20/2022]
Abstract
Cross-coupling chemistry is widely applied to carbon-carbon bond formation in the synthesis of medicines, agrochemicals, and other functional materials. Recently, single-electron-induced variants of this reaction class have proven particularly useful in the formation of C(sp2)-C(sp3) linkages, although certain compound classes have remained a challenge. Here, we report the use of sulfones to activate the alkyl coupling partner in nickel-catalyzed radical cross-coupling with aryl zinc reagents. This method's tolerance of fluoroalkyl substituents proved particularly advantageous for the streamlined preparation of pharmaceutically oriented fluorinated scaffolds that previously required multiple steps, toxic reagents, and nonmodular retrosynthetic blueprints. Five specific sulfone reagents facilitate the rapid assembly of a vast set of compounds, many of which contain challenging fluorination patterns.
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Affiliation(s)
- Rohan R Merchant
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jacob T Edwards
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Tian Qin
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Monika M Kruszyk
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Cheng Bi
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Guanda Che
- Asymchem Life Science (Tianjin), Tianjin Economic-Technological Development Zone, Tianjin 300457, China
| | - Deng-Hui Bao
- Asymchem Life Science (Tianjin), Tianjin Economic-Technological Development Zone, Tianjin 300457, China
| | - Wenhua Qiao
- Asymchem Life Science (Tianjin), Tianjin Economic-Technological Development Zone, Tianjin 300457, China
| | - Lijie Sun
- Asymchem Life Science (Tianjin), Tianjin Economic-Technological Development Zone, Tianjin 300457, China
| | - Michael R Collins
- Department of Chemistry, La Jolla Laboratories, Pfizer, 10770 Science Center Drive, San Diego, CA 92121, USA
| | | | - Gary M Gallego
- Department of Chemistry, La Jolla Laboratories, Pfizer, 10770 Science Center Drive, San Diego, CA 92121, USA
| | - James J Mousseau
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, CT 06340, USA
| | - Philippe Nuhant
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, CT 06340, USA
| | - Phil S Baran
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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245
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Guo T, Zhang L, Fang Y, Jin X, Li Y, Li R, Li X, Cen W, Liu X, Tian Z. Visible-Light-Promoted Decarboxylative Giese Reactions of α-Aryl Ethenylphosphonates and the Application in the Synthesis of Fosmidomycin Analogue. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701285] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ting Guo
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Ministry-of-Education Key Laboratory for Synthesis and Application of Organic Functional Molecules; Hubei University; No. 368 Youyi Dadao Wuhan 430062 People's Republic of China
| | - Li Zhang
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; No. 79 West Yingze Street; Taiyuan 030024 People's Republic of China
| | - Yewen Fang
- School of Materials and Chemical Engineering; Ningbo University of Technology; No. 201 Fenghua Road Ningbo 315211 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 People's Republic of China
| | - Xiaoping Jin
- Department of Pharmaceutical Engineering; Zhejiang Pharmaceutical College; No. 888 Yinxian Avenue East Ningbo 315100 People's Republic of China
| | - Yan Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Ministry-of-Education Key Laboratory for Synthesis and Application of Organic Functional Molecules; Hubei University; No. 368 Youyi Dadao Wuhan 430062 People's Republic of China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; No. 79 West Yingze Street; Taiyuan 030024 People's Republic of China
| | - Xie Li
- School of Materials and Chemical Engineering; Ningbo University of Technology; No. 201 Fenghua Road Ningbo 315211 People's Republic of China
| | - Wu Cen
- School of Materials and Chemical Engineering; Ningbo University of Technology; No. 201 Fenghua Road Ningbo 315211 People's Republic of China
| | - Xiaobo Liu
- School of Materials and Chemical Engineering; Ningbo University of Technology; No. 201 Fenghua Road Ningbo 315211 People's Republic of China
| | - Zongming Tian
- Department of Pharmaceutical Engineering; Zhejiang Pharmaceutical College; No. 888 Yinxian Avenue East Ningbo 315100 People's Republic of China
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246
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Shimbayashi T, Okamoto K, Ohe K. Iron-Catalyzed Aminative Cyclization/Intermolecular Homolytic Aromatic Substitution Using Oxime Esters and Simple Arenes. Chem Asian J 2018; 13:395-399. [DOI: 10.1002/asia.201701634] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/12/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Takuya Shimbayashi
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Kazuhiro Okamoto
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Kouichi Ohe
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
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247
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Naesborg L, Corti V, Leth LA, Poulsen PH, Jørgensen KA. Catalytic Asymmetric Oxidative γ-Coupling of α,β-Unsaturated Aldehydes with Air as the Terminal Oxidant. Angew Chem Int Ed Engl 2018; 57:1606-1610. [DOI: 10.1002/anie.201711944] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Line Naesborg
- Department of Chemistry; Aarhus University; 8000 Aarhus Denmark
| | - Vasco Corti
- Department of Chemistry; Aarhus University; 8000 Aarhus Denmark
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248
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Naesborg L, Corti V, Leth LA, Poulsen PH, Jørgensen KA. Catalytic Asymmetric Oxidative γ-Coupling of α,β-Unsaturated Aldehydes with Air as the Terminal Oxidant. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711944] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Line Naesborg
- Department of Chemistry; Aarhus University; 8000 Aarhus Denmark
| | - Vasco Corti
- Department of Chemistry; Aarhus University; 8000 Aarhus Denmark
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249
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Puls F, Knölker HJ. Conversion of Olefins into Ketones by an Iron-Catalyzed Wacker-type Oxidation Using Oxygen as the Sole Oxidant. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710370] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Florian Puls
- Department Chemie; Technische Universität Dresden; Bergstraße 66 01069 Dresden Germany
| | - Hans-Joachim Knölker
- Department Chemie; Technische Universität Dresden; Bergstraße 66 01069 Dresden Germany
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250
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Puls F, Knölker HJ. Conversion of Olefins into Ketones by an Iron-Catalyzed Wacker-type Oxidation Using Oxygen as the Sole Oxidant. Angew Chem Int Ed Engl 2017; 57:1222-1226. [DOI: 10.1002/anie.201710370] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 11/24/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Florian Puls
- Department Chemie; Technische Universität Dresden; Bergstraße 66 01069 Dresden Germany
| | - Hans-Joachim Knölker
- Department Chemie; Technische Universität Dresden; Bergstraße 66 01069 Dresden Germany
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