101
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Yang Y, Tsien J, Ben David A, Hughes JME, Merchant RR, Qin T. Practical and Modular Construction of C(sp 3)-Rich Alkyl Boron Compounds. J Am Chem Soc 2020; 143:471-480. [PMID: 33347297 DOI: 10.1021/jacs.0c11964] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alkyl boronic acids and esters play an important role in the synthesis of C(sp3)-rich medicines, agrochemicals, and material chemistry. This work describes a new type of transition-metal-free mediated transformation to enable the construction of C(sp3)-rich and sterically hindered alkyl boron reagents in a practical and modular manner. The broad generality and functional group tolerance of this method is extensively examined through a variety of substrates, including synthesis and late-stage functionalization of scaffolds relevant to medicinal chemistry. The strategic significance of this approach, with alkyl boronic acids as linchpins, is demonstrated through various downstream functionalizations of the alkyl boron compounds. This two-step concurrent cross-coupling approach, resembling formal and flexible alkyl-alkyl couplings, provides a general entry to synthetically challenging high Fsp3-containing drug-like scaffolds.
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Affiliation(s)
- Yangyang Yang
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Jet Tsien
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Ayala Ben David
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
| | - Jonathan M E Hughes
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Rohan R Merchant
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, California 94080, United States
| | - Tian Qin
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, United States
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102
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Zhang Q, Li X, Zhang W, Ni S, Wang Y, Pan Y. Decarboxylative Borylation of Stabilized and Activated Carbon Radicals. Angew Chem Int Ed Engl 2020; 59:21875-21879. [PMID: 32840957 DOI: 10.1002/anie.202008138] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/27/2020] [Indexed: 01/01/2023]
Abstract
Redox-active esters (RAEs) as active radical precursors have been extensively studied for C-B bond formations. However, the analogous transformations of stabilized radicals from the corresponding acid precursors remain challenging owing to the strong preference towards single-electron oxidation to the stable carbocations. This work describes a general strategy for rapid access to various aliphatic and aromatic boronic esters by mild photoinduced decarboxylative borylation. Both aryl and alkyl radicals could be generated from the leaving group-assisted N-hydroxybenzimidoyl chloride esters, even α-CF3 substituted substrates could be activated for further elaboration.
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Affiliation(s)
- Qiang Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Xiaojuan Li
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Weigang Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Shengyang Ni
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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103
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Zhang W, Wang C, Wang Q. Copper-Catalyzed Decarboxylative Functionalization of Conjugated β,γ-Unsaturated Carboxylic Acids. ACS Catal 2020; 10:13179-13185. [PMID: 34367721 PMCID: PMC8346209 DOI: 10.1021/acscatal.0c03621] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Copper-catalyzed decarboxylative coupling reactions of conjugated β,γ-unsaturated carboxylic acids have been achieved for allylic amination, alkylation, sulfonylation, and phosphinoylation. This approach was effective for a broad scope of amino, alkyl, sulfonyl, and phosphinoyl radical precursors as well as various conjugated β,γ-unsaturated carboxylic acids. These reactions also feature high regioselectivity, good functional group tolerance, and simple operation procedure. Mechanistic studies show that the reaction proceeds via copper-catalyzed electrophilic addition onto an olefin followed by decarboxylation, with radical intermediates involved. These insights present a modular and powerful strategy to access versatilely functionalized allyl-containing skeletons from readily available and stable carboxylic acids.
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Affiliation(s)
- Wei Zhang
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Chengming Wang
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Qiu Wang
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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104
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105
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Fu MC, Wang JX, Shang R. Triphenylphosphine-Catalyzed Alkylative Iododecarboxylation with Lithium Iodide under Visible Light. Org Lett 2020; 22:8572-8577. [DOI: 10.1021/acs.orglett.0c03173] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ming-Chen Fu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jia-Xin Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Rui Shang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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106
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Sheng T, Zhang HJ, Shang M, He C, Vantourout JC, Baran PS. Electrochemical Decarboxylative N-Alkylation of Heterocycles. Org Lett 2020; 22:7594-7598. [PMID: 32941044 PMCID: PMC8350983 DOI: 10.1021/acs.orglett.0c02799] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An operationally simple method to employ nonactivated carboxylic acids as alkylating agents in the N-alkylation of heterocycles is reported through an electrochemically driven anodic decarboxylative process. A wide substrate scope across a range of heterocycles is demonstrated along with a series of applications that significantly reduce the step count required to access such medicinally relevant structures.
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Affiliation(s)
- Tao Sheng
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Hai-Jun Zhang
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Ming Shang
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Chi He
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Julien. C. Vantourout
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Phil. S. Baran
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
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107
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Chen KQ, Wang ZX, Chen XY. Photochemical Decarboxylative C(sp3)–X Coupling Facilitated by Weak Interaction of N-Heterocyclic Carbene. Org Lett 2020; 22:8059-8064. [DOI: 10.1021/acs.orglett.0c03006] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Kun-Quan Chen
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang-Yu Chen
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
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108
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Liu YA, Liao X, Chen H. Recent Progress in Radical Decarboxylative Functionalizations Enabled by Transition-Metal (Ni, Cu, Fe, Co or Cr) Catalysis. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707273] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractAliphatic carboxylic acids are abundant in natural and synthetic sources and are widely used as connection points in many chemical transformations. Radical decarboxylative functionalization promoted by transition-metal catalysis has achieved great success, enabling carboxylic acids to be easily transformed into a wide variety of products. Herein, we highlight the recent advances made on transition-metal (Ni, Cu, Fe, Co or Cr) catalyzed C–X (X = C, N, H, O, B, or Si) bond formation as well as syntheses of ketones, amino acids, alcohols, ethers and difluoromethyl derivatives via radical decarboxylation of carboxylic acids or their derivatives, including, among others, redox-active esters (RAEs), anhydrides, and diacyl peroxides.1 Introduction2 Ni-Catalyzed Decarboxylative Functionalizations3 Cu-Catalyzed Decarboxylative Functionalizations4 Fe-Catalyzed Decarboxylative Functionalizations5 Co- and Cr-Catalyzed Decarboxylative Functionalizations6 Conclusions
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Affiliation(s)
- Yahu A Liu
- Discovery Chemistry, Genomics Institute of the Novartis Research Foundation
| | - Xuebin Liao
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Beijing Advanced Innovation Center for Structural Biology, Tsinghua University
| | - Hui Chen
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Beijing Advanced Innovation Center for Structural Biology, Tsinghua University
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109
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Zhang Q, Li X, Zhang W, Ni S, Wang Y, Pan Y. Decarboxylative Borylation of Stabilized and Activated Carbon Radicals. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Zhang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Xiaojuan Li
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Weigang Zhang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Shengyang Ni
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
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110
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Su W, Qiao RX, Jiang YY, Zhen XL, Tian X, Han JR, Fan SM, Cheng Q, Liu S. Ligand-Free Iron-Catalyzed Regioselectivity-Controlled Hydroboration of Aliphatic Terminal Alkenes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02731] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Wei Su
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Rui-Xiao Qiao
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Yuan-Ye Jiang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273100, China
| | - Xiao-Li Zhen
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Xia Tian
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Jian-Rong Han
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Shi-Ming Fan
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Qiushi Cheng
- School of Science, Hebei University of Science and Technology, Shijiazhuang 050022, China
| | - Shouxin Liu
- Hebei Key Laboratory of Molecular Chemistry for Drug, Hebei University of Science and Technology, Shijiazhuang 050022, China
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111
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Sato Y, Nakamura K, Yabushita K, Nagao K, Ohmiya H. Tertiary Alkylations of Aldehydes, Ketones or Imines Using Benzylic Organoboronates and a Base Catalyst. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yukiya Sato
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Kei Nakamura
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Kenya Yabushita
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Kazunori Nagao
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
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112
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Shu C, Madhavachary R, Noble A, Aggarwal VK. Photoinduced Fragmentation Borylation of Cyclic Alcohols and Hemiacetals. Org Lett 2020; 22:7213-7218. [PMID: 32903015 DOI: 10.1021/acs.orglett.0c02513] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chao Shu
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | | | - Adam Noble
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Varinder K. Aggarwal
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
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113
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Hinkes SPA, Kämmerer S, Klein CDP. Diversity-oriented synthesis of peptide-boronic acids by a versatile building-block approach. Chem Sci 2020; 11:9898-9903. [PMID: 34094250 PMCID: PMC8162117 DOI: 10.1039/d0sc03999c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 08/20/2020] [Indexed: 12/25/2022] Open
Abstract
A new strategy for the synthesis of peptide-boronic acids (PBAs) is presented. 20 Fmoc-protected natural amino acids with orthogonal side-chain protection were straightforwardly converted into their corresponding boron analogues in three simple steps. Subsequent immobilisation on commercially available 1-glycerol polystyrene resin and on-resin transformations yielded a diversity of sequences in high purity. The strategy eliminates various synthetic obstacles such as multi-step routes, low yields, and inseparable impurities. The described method comprises great potential to be implemented in automated combinatorial approaches by markedly facilitating the access to a variety of PBAs. The coupling of amino acids or other building blocks with α-aminoboronates allows the creation of hybrid molecules with significant potential in various scientific disciplines, such as medicinal chemistry, structural biology, and materials science.
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Affiliation(s)
- Stefan P A Hinkes
- Department of Medicinal Chemistry, Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Severin Kämmerer
- Department of Medicinal Chemistry, Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Christian D P Klein
- Department of Medicinal Chemistry, Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University Im Neuenheimer Feld 364 69120 Heidelberg Germany
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114
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Photoinduced Copper‐Catalyzed Asymmetric Decarboxylative Alkynylation with Terminal Alkynes. Angew Chem Int Ed Engl 2020; 59:16926-16932. [DOI: 10.1002/anie.202006317] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/24/2020] [Indexed: 12/13/2022]
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115
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Xia H, Li Z, Gu Q, Dong X, Fang J, Du X, Wang L, Liu X. Photoinduced Copper‐Catalyzed Asymmetric Decarboxylative Alkynylation with Terminal Alkynes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006317] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hai‐Dong Xia
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Zhong‐Liang Li
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Qiang‐Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and Technology Shenzhen 518055 China
| | - Xiao‐Yang Dong
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Jia‐Heng Fang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Xuan‐Yi Du
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Li‐Lei Wang
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Xin‐Yuan Liu
- Shenzhen Grubbs Institute and Department of Chemistry Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
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116
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Zhu F, Walczak MA. Stereochemistry of Transition Metal Complexes Controlled by the Metallo-Anomeric Effect. J Am Chem Soc 2020; 142:15127-15136. [PMID: 32786781 DOI: 10.1021/jacs.0c06882] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The use of stereoelectronic interactions to control reactivity and selectivity has a long history in chemistry. The anomeric effect, one of the fundamental concepts in organic chemistry, describes the preferences of a substituent at the anomeric carbon in glycosides to adopt axial configuration when the anomeric group is an electronegative element such as oxygen or a halogen. The origin of the anomeric effect has been the subject of intense debate. Explanations capitalizing on either the delocalization of the endocyclic oxygen lone pair into the antibonding σ*(C-X) orbital or the minimization of the dipole-dipole interactions are currently the two leading theoretical models. Although the majority of experimental and theoretical studies have focused on the elements from groups 6 and 7, little is known about conformational preferences of tetrahydropyran rings substituted with a transition metal at the anomeric carbon and the role of these interactions in stereoselective synthesis. Here, we report studies on conformational and configurational preferences of organometallic complexes stabilized by vicinal heteroatoms. We provide computational evidence that late transition metals adopt the axial position in heterocycles or synclinal geometry in acyclic systems. Furthermore, the anomeric preferences of late transition metals correlate with the oxidation state of the metal and can be explained by hyperconjugative interactions between endocyclic heteroatom and the σ* acceptor orbitals of the C-M bond. In a broader context, this discovery provides insight into the role of previously unanticipated stereoelectronic effects that can be harnessed in the design of stereoselective reactions, including chemical glycosylation and enantioselective catalysis.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
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117
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Abdolahi Jonghani S, Biglari Z, Gholipour A. NMR investigation of substituent effects on strength of π-π stacking and hydrogen bonding interactions to supports the formation of [2 + 2] photodimerization in (para-X-ba):::(bpe)||(bpe):::(para-X-ba) complexes. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.05.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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118
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Ye Z, Wu Y, Chen N, Zhang H, Zhu K, Ding M, Liu M, Li Y, Zhang F. Enantiospecific electrochemical rearrangement for the synthesis of hindered triazolopyridinone derivatives. Nat Commun 2020; 11:3628. [PMID: 32686668 PMCID: PMC7371640 DOI: 10.1038/s41467-020-17389-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 06/18/2020] [Indexed: 01/30/2023] Open
Abstract
Triazolopyridinone derivatives are of high value in both medicinal and material chemistry. However, the chiral or hindered triazolopyridinone derivatives remain an underexplored area of chemical space because they are difficult to prepare via conventional methods. Here we report an electrochemical rearrangement for the efficient synthesis of otherwise inaccessible triazolopyridinones with diverse alkyl carboxylic acids as starting materials. This enables the efficient preparation of more than 60 functionalized triazolopyridinones under mild conditions in a sustainable manner. This method is evaluated for the late stage modification of bioactive natural products, amino acids and pharmaceuticals, and it is further applied to the decagram scale preparation of enantiopure triazolopyridinones. The control experiments support a mechanism involving an oxidative cyclization and 1,2-carbon migration. This facile and scalable rearrangement demonstrates the power of electrochemical synthesis to access otherwise-inaccessible triazolopyridinones and may find wide application in organic, material and medicinal chemistry. Chiral and hindered triazolopyridinone derivatives are an underexplored area of chemical space mainly due to their challenging synthesis via classical methods. Here, the authors report an electrochemical rearrangement for the synthesis of triazolopyridinones using diverse, available alkyl carboxylic acids as starting materials.
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Affiliation(s)
- Zenghui Ye
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China.,Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Yanqi Wu
- Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Na Chen
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Hong Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Kai Zhu
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China.,Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Mingruo Ding
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Min Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Yong Li
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China
| | - Fengzhi Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, 310014, Hangzhou, PR China. .,Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 310014, Hangzhou, PR China.
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119
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Sun ZY, Zhou S, Yang K, Guo M, Zhao W, Tang X, Wang G. Tetrahydroxydiboron-Promoted Radical Addition of Alkynols. Org Lett 2020; 22:6214-6219. [DOI: 10.1021/acs.orglett.0c02367] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ze-Ying Sun
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Sen Zhou
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Kai Yang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
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120
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Mills LR, Monteith JJ, Dos Passos Gomes G, Aspuru-Guzik A, Rousseaux SAL. The Cyclopropane Ring as a Reporter of Radical Leaving-Group Reactivity for Ni-Catalyzed C(sp 3)-O Arylation. J Am Chem Soc 2020; 142:13246-13254. [PMID: 32609494 DOI: 10.1021/jacs.0c06904] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The ability to understand and predict reactivity is essential for the development of new reactions. In the context of Ni-catalyzed C(sp3)-O functionalization, we have developed a unique strategy employing activated cyclopropanols to aid the design and optimization of a redox-active leaving group for C(sp3)-O arylation. In this chemistry, the cyclopropane ring acts as a reporter of leaving-group reactivity, since the ring-opened product is obtained under polar (2e) conditions, and the ring-closed product is obtained under radical (1e) conditions. Mechanistic studies demonstrate that the optimal leaving group is redox-active and are consistent with a Ni(I)/Ni(III) catalytic cycle. The optimized reaction conditions are also used to synthesize a number of arylcyclopropanes, which are valuable pharmaceutical motifs.
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Affiliation(s)
- L Reginald Mills
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - John J Monteith
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Gabriel Dos Passos Gomes
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.,Department of Computer Science, University of Toronto, 214 College St., Toronto, Ontario M5T 3A1, Canada
| | - Alán Aspuru-Guzik
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.,Department of Computer Science, University of Toronto, 214 College St., Toronto, Ontario M5T 3A1, Canada.,Vector Institute for Artificial Intelligence, 661 University Ave. Suite 710, Toronto, Ontario M5G 1M1, Canada.,Lebovic Fellow, Canadian Institute for Advanced Research (CIFAR), 661 University Ave, Toronto, Ontario M5G 1M1, Canada
| | - Sophie A L Rousseaux
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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121
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Wang M, Shi Z. Methodologies and Strategies for Selective Borylation of C-Het and C-C Bonds. Chem Rev 2020; 120:7348-7398. [PMID: 32597639 DOI: 10.1021/acs.chemrev.9b00384] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Organoborons have emerged as versatile building blocks in organic synthesis to achieve molecular diversity and as carboxylic acid bioisosteres with broad applicability in drug discovery. Traditionally, these compounds are prepared by the substitution of Grignard/lithium reagents with electrophilic boron species and Brown hydroboration. Recent developments have provided new routes for the efficient preparation of organoborons by applying reactions using chemical feedstocks with leaving groups. As compared to the previous methods that used organic halides (I, Br, and Cl), the direct borylation of less reactive C-Het and C-C bonds has become highly important to get efficiency and functional-group compatibility. This Review aims to provide a comprehensive overview of this topic, including (1) C-F bond borylation, (2) C-O bond borylation, (3) C-S bond borylation, (4) C-N bond borylation, and (5) C-C bond borylation. Considerable attention is given to the strategies and mechanisms involved. We expect that this Review will inspire chemists to discover more efficient transformations to expand this field.
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Affiliation(s)
- Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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122
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Li J, Wang H, Qiu Z, Huang CY, Li CJ. Metal-Free Direct Deoxygenative Borylation of Aldehydes and Ketones. J Am Chem Soc 2020; 142:13011-13020. [DOI: 10.1021/jacs.0c03813] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jianbin Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Haining Wang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Zihang Qiu
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chia-Yu Huang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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123
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Ueda M, Kato Y, Taniguchi N, Morisaki T. High Reactivity of α-Boryl Radical of Potassium Alkyltrifluoroborate in Atom-Transfer Radical Addition. Org Lett 2020; 22:6234-6238. [PMID: 32584583 DOI: 10.1021/acs.orglett.0c01807] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We found that the α-boryl radical of potassium alkyltrifluoroborate shows higher reactivity compared to the α-boryl radicals of alkylboronic acid pinacol ester and alkyl N-methyl imidodiacetic acid (MIDA) boronate in the halogen atom abstraction step of atom-transfer radical addition (ATRA) between alkyl bromide and vinylborons. In this research, an ATRA of alkyl halides with potassium vinyltrifluoroborate furnished unique alkylborons, which are difficult to synthesize by other methods.
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Affiliation(s)
- Mitsuhiro Ueda
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Yuri Kato
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Naoya Taniguchi
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahiro Morisaki
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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124
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Zhao JH, Zhou ZZ, Zhang Y, Su X, Chen XM, Liang YM. Visible-light-mediated borylation of aryl and alkyl halides with a palladium complex. Org Biomol Chem 2020; 18:4390-4394. [PMID: 32483581 DOI: 10.1039/d0ob00028k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Palladium catalyzed visible-light-mediated borylation of inactivated aryl and alkyl halides is reported; the method provided high yields and excellent functional group compatibility. Furthermore, arylsilicates were synthesized selectively using dimethylphenylsilyl boronic ester via changing the reaction conditions. Finally, the possible reaction mechanism is determined through fluorescence quenching and turn on/off experiments.
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Affiliation(s)
- Jia-Hui Zhao
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Zhao-Zhao Zhou
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China. and School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yue Zhang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Xuan Su
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
| | - Xi-Meng Chen
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
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125
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Kondo H, Miyamura S, Matsushita K, Kato H, Kobayashi C, Arifin, Itami K, Yokogawa D, Yamaguchi J. σ-Bond Hydroboration of Cyclopropanes. J Am Chem Soc 2020; 142:11306-11313. [DOI: 10.1021/jacs.0c05213] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Hiroki Kondo
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Shin Miyamura
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Kaoru Matsushita
- Department of Applied Chemistry, Waseda University, Tokyo 169-0072, Japan
| | - Hiroki Kato
- Department of Applied Chemistry, Waseda University, Tokyo 169-0072, Japan
| | - Chisa Kobayashi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Arifin
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Daisuke Yokogawa
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
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126
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Demchuk OP, Hryshchuk OV, Vashchenko BV, Kozytskiy AV, Tymtsunik AV, Komarov IV, Grygorenko OO. Photochemical [2 + 2] Cycloaddition of Alkenyl Boronic Derivatives: An Entry into 3-Azabicyclo[3.2.0]heptane Scaffold. J Org Chem 2020; 85:5927-5940. [PMID: 32233365 DOI: 10.1021/acs.joc.0c00265] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The synthesis of 3-azabicyclo[3.2.0]heptyl boropinacolates and trifluoroborates via the [2 + 2] photocycloaddition of the corresponding alkenyl boronic derivatives and maleimides or maleic anhydride is described. Optimization of the reaction conditions (i.e., wavelength, concentration of the reagents, photosensitizer) was carried out, and the scope and limitations of the method were studied. Alkenyl boronic acid pinacolates were found to be more suitable for the [2 + 2] cycloaddition, providing better reaction outcomes compared to the trifluoroborates. The utility of this approach was shown by the preparation of bi- and trifunctional building blocks (21 examples), which could be easily synthesized on up to 60 g scale. These cycloadducts provide a convenient entry into the 3-azabicyclo[3.2.0]heptane scaffold through the C-C coupling or oxidative deborylation reactions.
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Affiliation(s)
- Oleksandr P Demchuk
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanska Street 5, Kyiv 02660, Ukraine
| | - Oleksandr V Hryshchuk
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Bohdan V Vashchenko
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Andriy V Kozytskiy
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,L. V. Pisarzhevskii Institute of Physical Chemistry of National Academy of Sciences of Ukraine, Nauky Avenue, 31, Kyiv 03028, Ukraine
| | - Andriy V Tymtsunik
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Prospect Peremogy 37, Kyiv 03056, Ukraine
| | - Igor V Komarov
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd., Chervonotkatska Street 78, Kyiv 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyiv 01601, Ukraine
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127
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Liu M, Zhang Z, Chen B, Meng Q, Zhang P, Song J, Han B. Synthesis of thioethers, arenes and arylated benzoxazoles by transformation of the C(aryl)-C bond of aryl alcohols. Chem Sci 2020; 11:7634-7640. [PMID: 34094141 PMCID: PMC8159426 DOI: 10.1039/d0sc01229g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Transformation of aryl alcohols into high-value functionalized aromatic compounds by selective cleavage and functionalization of the C(aryl)–C(OH) bond is of crucial importance, but very challenging by far. Herein, for the first time, we report a novel and versatile strategy for activation and functionalization of C(aryl)–C(OH) bonds by the cooperation of oxygenation and decarboxylative functionalization. A diverse range of aryl alcohol substrates were employed as arylation reagents via the cleavage of C(aryl)–C(OH) bonds and effectively converted into corresponding thioether, arene, and arylated benzoxazole products in excellent yields, in a Cu based catalytic system using O2 as the oxidant. This study offers a new way for aryl alcohol conversion and potentially offers a new opportunity to produce high-value functionalized aromatics from renewable feedstocks such as lignin which features abundant C(aryl)–C(OH) bonds in its linkages. Aryl alcohols served as aryl agents by effective activation of C(aryl)–C(OH) bonds, and were transformed into corresponding thioether, arene, and arylated benzoxazole products in excellent yields.![]()
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Affiliation(s)
- Mingyang Liu
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences Beijing 100049 China.,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Zhanrong Zhang
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Bingfeng Chen
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Qinglei Meng
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Pei Zhang
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Jinliang Song
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
| | - Buxing Han
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China .,School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences Beijing 100049 China.,Physical Science Laboratory, Huairou National Comprehensive Science Center Beijing 101400 China
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128
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Sun S, Duan Y, Mega RS, Somerville RJ, Martin R. Site‐Selective 1,2‐Dicarbofunctionalization of Vinyl Boronates through Dual Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916279] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shang‐Zheng Sun
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Universitat Rovira i VirgiliDepartament de Química Analítica i Química Orgànica c/Marcel lí Domingo, 1 43007 Tarragona Spain
| | - Yaya Duan
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Riccardo S. Mega
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Rosie J. Somerville
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Universitat Rovira i VirgiliDepartament de Química Analítica i Química Orgànica c/Marcel lí Domingo, 1 43007 Tarragona Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluïs Companys, 23 08010 Barcelona Spain
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129
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Merchant RR, Lopez JA. A General C(sp3)–C(sp3) Cross-Coupling of Benzyl Sulfonylhydrazones with Alkyl Boronic Acids. Org Lett 2020; 22:2271-2275. [DOI: 10.1021/acs.orglett.0c00471] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rohan R. Merchant
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, California 94080, United States
| | - Jovan A. Lopez
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, California 94080, United States
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130
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Niwa T, Hosoya T. Molecular Renovation Strategy for Expeditious Synthesis of Molecular Probes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190310] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Takashi Niwa
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Chemical Biology Team, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies (CLST), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Takamitsu Hosoya
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Chemical Biology Team, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies (CLST), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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131
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Fan D, Zhang J, Hu Y, Zhang Z, Gridnev ID, Zhang W. Asymmetric Hydrogenation of α-Boryl Enamides Enabled by Nonbonding Interactions. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04543] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dongyang Fan
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Jian Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yanhua Hu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Ilya D. Gridnev
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki 3-6, Aoba-ku, Sendai 980-8578, Japan
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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132
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Sun SZ, Duan Y, Mega RS, Somerville RJ, Martin R. Site-Selective 1,2-Dicarbofunctionalization of Vinyl Boronates through Dual Catalysis. Angew Chem Int Ed Engl 2020; 59:4370-4374. [PMID: 31910307 DOI: 10.1002/anie.201916279] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/07/2020] [Indexed: 01/05/2023]
Abstract
A modular, site-selective 1,2-dicarbofunctionalization of vinyl boronates with organic halides through dual catalysis is described. This reaction proceeds under mild conditions and is characterized by excellent chemo- and regioselectivity. It thus represents a complementary new technique for preparing densely functionalized alkyl boron architectures from simple and accessible precursors.
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Affiliation(s)
- Shang-Zheng Sun
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Universitat Rovira i Virgili, Departament de Química Analítica i Química Orgànica, c/Marcel lí Domingo, 1, 43007, Tarragona, Spain
| | - Yaya Duan
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Riccardo S Mega
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Rosie J Somerville
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Universitat Rovira i Virgili, Departament de Química Analítica i Química Orgànica, c/Marcel lí Domingo, 1, 43007, Tarragona, Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010, Barcelona, Spain
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133
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VanHeyst MD, Qi J, Roecker AJ, Hughes JME, Cheng L, Zhao Z, Yin J. Continuous Flow-Enabled Synthesis of Bench-Stable Bicyclo[1.1.1]pentane Trifluoroborate Salts and Their Utilization in Metallaphotoredox Cross-Couplings. Org Lett 2020; 22:1648-1654. [PMID: 31990565 DOI: 10.1021/acs.orglett.0c00242] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Bicyclo[1.1.1]pentane motifs have gained increasing popularity in medicinal chemistry as bioisosteres because of their ability to impact key physicochemical properties. However, reports of direct C(sp2)-C(sp3) cross-coupling of these fragments to afford biaryl isosteres have been scarce. Herein we describe the development of continuous flow-enabled synthesis of bench-stable bicyclo[1.1.1]pentane trifluoroborate salts. Furthermore, we demonstrate the use of metallaphotoredox conditions to enable cross-coupling of these building blocks with complex aryl halide substrates.
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Affiliation(s)
- Michael D VanHeyst
- Discovery Chemistry , Merck & Co., Inc. , West Point , Pennsylvania 19486 , United States
| | - Ji Qi
- Department of Process Research and Development , Merck & Co., Inc. , Rahway , New Jersey 07065 , United States.,Process Research and Development , MSD R&D (China) Co., Ltd. , Building 21 Rongda Road , Wangjing R&D Base, Zhongguancun Electronic Zone West Zone, Beijing 100012 , China
| | - Anthony J Roecker
- Discovery Chemistry , Merck & Co., Inc. , West Point , Pennsylvania 19486 , United States
| | - Jonathan M E Hughes
- Department of Process Research and Development , Merck & Co., Inc. , Rahway , New Jersey 07065 , United States
| | - Lili Cheng
- Chemistry Service Unit , WuXi AppTec (Tianjin) , 168 Nanhai Road , Tianjin Economic-Technological Development Area (TEDA), Tianjin 300457 , China
| | - Zheyu Zhao
- Chemistry Service Unit , WuXi AppTec (Tianjin) , 168 Nanhai Road , Tianjin Economic-Technological Development Area (TEDA), Tianjin 300457 , China
| | - Jingjun Yin
- Department of Process Research and Development , Merck & Co., Inc. , Rahway , New Jersey 07065 , United States
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134
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Jin S, Dang HT, Haug GC, He R, Nguyen VD, Nguyen VT, Arman HD, Schanze KS, Larionov OV. Visible Light-Induced Borylation of C-O, C-N, and C-X Bonds. J Am Chem Soc 2020; 142:1603-1613. [PMID: 31899630 PMCID: PMC7137638 DOI: 10.1021/jacs.9b12519] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Boronic acids are centrally important functional motifs and synthetic precursors. Visible light-induced borylation may provide access to structurally diverse boronates, but a broadly efficient photocatalytic borylation method that can effect borylation of a wide range of substrates, including strong C-O bonds, remains elusive. Herein, we report a general, metal-free visible light-induced photocatalytic borylation platform that enables borylation of electron-rich derivatives of phenols and anilines, chloroarenes, as well as other haloarenes. The reaction exhibits excellent functional group tolerance, as demonstrated by the borylation of a range of structurally complex substrates. Remarkably, the reaction is catalyzed by phenothiazine, a simple organic photocatalyst with MW < 200 that mediates the previously unachievable visible light-induced single electron reduction of phenol derivatives with reduction potentials as negative as approximately - 3 V versus SCE by a proton-coupled electron transfer mechanism. Mechanistic studies point to the crucial role of the photocatalyst-base interaction.
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Affiliation(s)
- Shengfei Jin
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Hang T Dang
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Graham C Haug
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Ru He
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
- Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
| | - Viet D Nguyen
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Vu T Nguyen
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Hadi D Arman
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Kirk S Schanze
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
| | - Oleg V Larionov
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , United States
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135
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Jiang WT, Yang S, Xu MY, Xie XY, Xiao B. Zn-mediated decarboxylative carbagermatranation of aliphatic N-hydroxyphthalimide esters: evidence for an alkylzinc intermediate. Chem Sci 2020; 11:488-493. [PMID: 32874490 PMCID: PMC7439774 DOI: 10.1039/c9sc04288a] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Accepted: 11/13/2019] [Indexed: 01/10/2023] Open
Abstract
Alkyl nucleophiles synthesized by decarboxylation of the corresponding N-hydroxyphthalimide esters (NHP esters) would inherit the complex structure of natural carboxylic acids and result in useful cross-coupling fragments. Herein, we report the synthesis of alkyl carbagermatranes via Zn-mediated decarboxylation of NHP esters without Ni catalysis or photocatalysis. Mechanistic studies indicate that an alkyl zinc intermediate was involved; however, the generation of alkyl zinc will be inhibited in the presence of Ni. Hence, this study provides valuable resolution to the perplexing problem about whether organozinc was involved in recently emerging catalytic systems of NHP ester-Zn. Meanwhile, alkyl zinc reagents from NHP esters are compatible with aryl/alkyl bromides and iodides; therefore the scope of carbagermatranation in this work precedes that of in situ-generated organozinc from alkyl halides.
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Affiliation(s)
- Wei-Tao Jiang
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China .
| | - Shuo Yang
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China .
| | - Meng-Yu Xu
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China .
| | - Xiu-Ying Xie
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China .
| | - Bin Xiao
- Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China .
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136
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Na CG, Ravelli D, Alexanian EJ. Direct Decarboxylative Functionalization of Carboxylic Acids via O-H Hydrogen Atom Transfer. J Am Chem Soc 2020; 142:44-49. [PMID: 31877036 PMCID: PMC7147874 DOI: 10.1021/jacs.9b10825] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Decarboxylative functionalization via hydrogen atom transfer offers an attractive alternative to standard redox approaches to this important class of transformations. Herein, we report a direct decarboxylative functionalization of aliphatic carboxylic acids using N-xanthylamides. The unique reactivity of amidyl radicals in hydrogen atom transfer enables decarboxylative xanthylation under redox-neutral conditions. This platform provides expedient access to a range of derivatives through subsequent elaboration of the xanthate group.
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Affiliation(s)
- Christina G. Na
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States
| | - Davide Ravelli
- PhotoGreen Lab, Department of Chemistry, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy
| | - Erik J. Alexanian
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States
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137
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Collin DE, Folgueiras‐Amador AA, Pletcher D, Light ME, Linclau B, Brown RCD. Cubane Electrochemistry: Direct Conversion of Cubane Carboxylic Acids to Alkoxy Cubanes Using the Hofer-Moest Reaction under Flow Conditions. Chemistry 2020; 26:374-378. [PMID: 31593312 PMCID: PMC6973092 DOI: 10.1002/chem.201904479] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 12/12/2022]
Abstract
The highly strained cubane system is of great interest as a scaffold and rigid linker in both pharmaceutical and materials chemistry. The first electrochemical functionalisation of cubane by oxidative decarboxylative ether formation (Hofer-Moest reaction) was demonstrated. The mild conditions are compatible with the presence of other oxidisable functional groups, and the use of flow electrochemical conditions allows straightforward upscaling.
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Affiliation(s)
- Diego E. Collin
- School of ChemistryUniversity of SouthamptonHighfield, SouthamptonSO17 1BJUK
| | | | - Derek Pletcher
- School of ChemistryUniversity of SouthamptonHighfield, SouthamptonSO17 1BJUK
| | - Mark E. Light
- School of ChemistryUniversity of SouthamptonHighfield, SouthamptonSO17 1BJUK
| | - Bruno Linclau
- School of ChemistryUniversity of SouthamptonHighfield, SouthamptonSO17 1BJUK
| | - Richard C. D. Brown
- School of ChemistryUniversity of SouthamptonHighfield, SouthamptonSO17 1BJUK
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138
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Abstract
The application of designer peptides in medicinal chemistry, chemical biology, and materials science has generated new interest in synthetic methods for the structural modification of amino acids. Strategies which facilitate the direct diversification of proteinogenic functional groups within unprotected peptide substrates are particularly attractive as they leverage modern solution- and solid-phase protocols-tools which are now both robust and routine-for the synthesis of native peptides. Accordingly, a recent approach to the decarboxylative functionalization of peptidic carboxylic acids, including aspartic/glutamic acid residues and α-carboxylic acids, has proven to be a promising new strategy for peptide modification. This synthetic method merges conventional strategies for the activation of carboxylic acids with transition metal-catalyzed cross-coupling chemistry to forge new C-C bonds for the late-stage introduction of valuable synthetic handles. This chapter details a step-by-step protocol for the activation and nickel-catalyzed decarboxylative alkylation of a simple peptide substrate to highlight the broad utility of this strategy for the synthesis of designer peptides.
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Affiliation(s)
- Meng Yao Zhang
- Research School of Chemistry, Australian National University, Canberra, ACT, Australia
| | - Lara R Malins
- Research School of Chemistry, Australian National University, Canberra, ACT, Australia.
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139
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Ma G, Chen C, Talukdar S, Zhao X, Lei C, Gong H. Metal catalyst-free photo-induced alkyl C–O bond borylation. Chem Commun (Camb) 2020; 56:10219-10222. [DOI: 10.1039/d0cc04776g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tertiary alkyl boronates were prepared via the C–O bond borylation of the corresponding oxalates under catalyst-free/(DMF)2–B2cat2 initiated visible light-induced conditions.
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Affiliation(s)
- Guobin Ma
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Changzhou Chen
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Sangita Talukdar
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Xinluo Zhao
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Chuanhu Lei
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
| | - Hegui Gong
- Center for Supramolecular Chemistry and Catalysis, Department of Chemistry and Department of Physics and Institute for the Conservation of Cultural Heritage
- Shanghai University
- Shanghai 200444
- China
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140
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Shu X, Xu R, Ma Q, Liao S. Accessing alkyl boronic esters via visible light-mediated decarboxylative addition reactions of redox-active esters. Org Chem Front 2020. [DOI: 10.1039/d0qo00440e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A visible light-mediated decarboxylative addition reaction for the synthesis of boronic esters based on abundant alkyl carboxylic acid feedstock has been developed.
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Affiliation(s)
- Xianli Shu
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University)
- College of Chemistry
- Fuzhou University
- Fuzhou 350108
- China
| | - Ruting Xu
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University)
- College of Chemistry
- Fuzhou University
- Fuzhou 350108
- China
| | - Qiang Ma
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University)
- College of Chemistry
- Fuzhou University
- Fuzhou 350108
- China
| | - Saihu Liao
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University)
- College of Chemistry
- Fuzhou University
- Fuzhou 350108
- China
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141
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Zhan BB, Jiang MX, Shi BF. Late-stage functionalization of peptides via a palladium-catalyzed C(sp3)–H activation strategy. Chem Commun (Camb) 2020; 56:13950-13958. [DOI: 10.1039/d0cc06133f] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent advances in the late-stage modification of peptides via palladium-catalyzed C(sp3)–H functionalization are summarized.
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Affiliation(s)
- Bei-Bei Zhan
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
| | - Meng-Xue Jiang
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen
- Guangdong 529020
- China
| | - Bing-Feng Shi
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
- College of Chemistry and Molecular Engineering
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142
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Dai PF, Wang H, Cui XC, Qu JP, Kang YB. Recent progress in C(aryl)–C(alkyl) bond cleavage of alkylarenes. Org Chem Front 2020. [DOI: 10.1039/c9qo01438a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cleavage of the C(aryl)–C(alkyl) σ-bond is important both in academy and industry as it holds the potential to provide straightforward access to a variety of targets from readily available chemical feedstocks such like alkylarenes.
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Affiliation(s)
- Peng-Fei Dai
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Hua Wang
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Xian-Chao Cui
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Jian-Ping Qu
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Yan-Biao Kang
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
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143
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Wu J, Bär RM, Guo L, Noble A, Aggarwal VK. Photoinduced Deoxygenative Borylations of Aliphatic Alcohols. Angew Chem Int Ed Engl 2019; 58:18830-18834. [PMID: 31613033 DOI: 10.1002/anie.201910051] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/14/2019] [Indexed: 01/14/2023]
Abstract
A photochemical method for converting aliphatic alcohols into boronic esters is described. Preactivation of the alcohol as a 2-iodophenyl-thionocarbonate enables a novel Barton-McCombie-type radical deoxygenation that proceeds efficiently with visible light irradiation and without the requirement for a photocatalyst, a radical initiator, or tin or silicon hydrides. The resultant alkyl radical is intercepted by bis(catecholato)diboron, furnishing boronic esters from a diverse range of structurally complex alcohols.
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Affiliation(s)
- Jingjing Wu
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Robin M Bär
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Lin Guo
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Adam Noble
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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144
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Wei D, Liu TM, Zhou B, Han B. Decarboxylative Borylation of mCPBA-Activated Aliphatic Acids. Org Lett 2019; 22:234-238. [DOI: 10.1021/acs.orglett.9b04218] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Tu-Ming Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bo Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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145
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Derosa J, Kang T, Tran VT, Wisniewski SR, Karunananda MK, Jankins TC, Xu KL, Engle KM. Nickel‐Catalyzed 1,2‐Diarylation of Alkenyl Carboxylates: A Gateway to 1,2,3‐Trifunctionalized Building Blocks. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913062] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Joseph Derosa
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Taeho Kang
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Van T. Tran
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Steven R. Wisniewski
- Chemical & Synthetic Development Bristol-Myers Squibb 1 Squibb Drive New Brunswick NJ 08903 USA
| | - Malkanthi K. Karunananda
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Tanner C. Jankins
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Kane L. Xu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Keary M. Engle
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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146
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Derosa J, Kang T, Tran VT, Wisniewski SR, Karunananda MK, Jankins TC, Xu KL, Engle KM. Nickel‐Catalyzed 1,2‐Diarylation of Alkenyl Carboxylates: A Gateway to 1,2,3‐Trifunctionalized Building Blocks. Angew Chem Int Ed Engl 2019; 59:1201-1205. [DOI: 10.1002/anie.201913062] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Joseph Derosa
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Taeho Kang
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Van T. Tran
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Steven R. Wisniewski
- Chemical & Synthetic Development Bristol-Myers Squibb 1 Squibb Drive New Brunswick NJ 08903 USA
| | - Malkanthi K. Karunananda
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Tanner C. Jankins
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Kane L. Xu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Keary M. Engle
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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147
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Srimontree W, Guo L, Rueping M. Hydride Transfer Enables the Nickel‐Catalyzed
ipso
‐Borylation and Silylation of Aldehydes. Chemistry 2019; 26:423-427. [DOI: 10.1002/chem.201904842] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Watchara Srimontree
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Lin Guo
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
- Kaust Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
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148
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Medina JM, Kang T, Erbay TG, Shao H, Gallego GM, Yang S, Tran-Dubé M, Richardson PF, Derosa J, Helsel RT, Patman RL, Wang F, Ashcroft CP, Braganza JF, McAlpine I, Liu P, Engle KM. Cu-Catalyzed Hydroboration of Benzylidenecyclopropanes: Reaction Optimization, (Hetero)Aryl Scope, and Origins of Pathway Selectivity. ACS Catal 2019; 9:11130-11136. [PMID: 32617185 DOI: 10.1021/acscatal.9b03557] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The copper-catalyzed hydroboration of benzylidenecyclopropanes, conveniently accessed in one step from readily available benzaldehydes, is reported. Under otherwise identical reaction conditions, two distinct phosphine ligands grant access to different products by either suppressing or promoting cyclopropane opening via β-carbon elimination. Computational studies provide insight into how the rigidity and steric environment of these different bis-phosphine ligands influence the relative activation energies of β-carbon elimination versus protodecupration from the key benzylcopper intermediate. The method tolerates a wide variety of heterocycles prevalent in clinical and pre-clinical drug development, giving access to valuable synthetic intermediates. The versatility of the tertiary cyclopropylboronic ester products is demonstrated through several derivatization reactions.
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Affiliation(s)
- Jose M. Medina
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Taeho Kang
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tuğçe G. Erbay
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Huiling Shao
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Gary M. Gallego
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Shouliang Yang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Paul F. Richardson
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Joseph Derosa
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan T. Helsel
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan L. Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Christopher P. Ashcroft
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - John F. Braganza
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Indrawan McAlpine
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Keary M. Engle
- Department of Chemistry, Scripps Research, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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149
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Gao DW, Gao Y, Shao H, Qiao TZ, Wang X, Sanchez BB, Chen JS, Liu P, Engle KM. Cascade CuH-Catalysed Conversion of Alkynes to Enantioenriched 1,1-Disubstituted Products. Nat Catal 2019; 3:23-29. [PMID: 32420528 PMCID: PMC7227802 DOI: 10.1038/s41929-019-0384-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/18/2019] [Indexed: 01/09/2023]
Abstract
Enantioenriched α-aminoboronic acids play a unique role in medicinal chemistry and have emerged as privileged pharmacophores in proteasome inhibitors. Additionally, they represent synthetically useful chiral building blocks in organic synthesis. Recently, CuH-catalyzed asymmetric alkene hydrofunctionalization has become a powerful tool to construct stereogenic carbon centers. In contrast, applying CuH cascade catalysis to achieve reductive 1,1-difunctionalization of alkynes remains an important, but largely unaddressed, synthetic challenge. Herein, we report an efficient strategy to synthesize α-aminoboronates via CuH-catalyzed hydroboration/hydroamination cascade of readily available alkynes. Notably, this transformation selectively delivers the desired 1,1-heterodifunctionalized product in favor of alternative homodifunctionalized, 1,2-heterodifunctionalized, or reductively monofunctionalized byproducts, thereby offering rapid access to these privileged scaffolds with high chemo-, regio- and enantioselectivity.
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Affiliation(s)
- De-Wei Gao
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Yang Gao
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Huiling Shao
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - Tian-Zhang Qiao
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Xin Wang
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Brittany B Sanchez
- Automated Synthesis Facility, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Jason S Chen
- Automated Synthesis Facility, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, United States
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150
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Ming W, Liu X, Friedrich A, Krebs J, Marder TB. The Borono–Strecker Reaction: Synthesis of α-Aminoboronates via a Multicomponent Reaction of Carbonyl Compounds, Amines, and B2pin2. Org Lett 2019; 22:365-370. [DOI: 10.1021/acs.orglett.9b03773] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenbo Ming
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Xiaocui Liu
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Alexandra Friedrich
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Johannes Krebs
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Todd B. Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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