1
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Zhang L, Hong C, Tang J, Wu W, Jiang H. Palladium-Catalyzed Carbohalogenation of Olefins with Alkynyl Oxime Ethers: Rapid Access to Chlorine-Containing Isoxazoles. J Org Chem 2024; 89:6615-6625. [PMID: 38652857 DOI: 10.1021/acs.joc.4c00453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
A palladium-catalyzed carbohalogenation of olefins with alkynyl oxime ethers has been described, which provides efficient and practical access to various chlorine-containing isoxazoles. This method exhibits excellent regioselectivity, good functional group compatibility, and mild reaction conditions. The mechanistic studies suggest that the reaction proceeds via a stabilized π-benzyl palladium intermediate, which is essential for the formation of C(sp3)-Cl bonds.
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Affiliation(s)
- Liren Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Chenjing Hong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Junlong Tang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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2
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Qian YS, Zhao JB, Xu YH. Synthesis and Transformation of Bis(silyl)-Substituted Conjugated Vinylallene Compounds. Org Lett 2023; 25:7332-7337. [PMID: 37782771 DOI: 10.1021/acs.orglett.3c02738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
We develop a copper-catalyzed disilylation of polysubstituted pent-1-en-4-yn-3-yl acetate derivatives, which in one pot furnishes the bis(silyl)-substituted vinylallenes in moderate yields under mild reaction conditions. The reaction shows broad substrate scope and single stereoselectivity. Besides, we develop a method to decrease the electrocyclization temperature of vinylallenes for the synthesis of methylenecyclobutenes by installing bis(silyl) substituents. And the effect of a silyl substituent on electrocyclization of vinylallenes was studied via DFT computation. The synthetic method features broad substrate scope and excellent stereoselectivity.
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Affiliation(s)
- Yi-Sen Qian
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. C
| | - Jin-Bo Zhao
- Faculty of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. C
| | - Yun-He Xu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. C
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3
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Zeng X, Cheng Z, Xie Y, Gu Y. Transition-metal-free Synthesis of tetra-substituted Vinyl Iodides by Cascade Sequential Reaction of α-Keto Acids, 1-Iodoalkynes, and Alkyl Halides. Chem Asian J 2023; 18:e202201117. [PMID: 36458644 DOI: 10.1002/asia.202201117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/05/2022]
Abstract
The cascade sequential reaction of α-keto acids, 1-iodoalkynes, and alkyl halides are reported herein to synthesize tetra-substituted vinyl iodides. It represents an efficient protocol to access a diverse range of tetra-substituted vinyl iodides starting from simple materials in a one-pot fashion, featuring mild reaction conditions, ease of operation, and broad substrate scope.
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Affiliation(s)
- Xiaobao Zeng
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target School of Pharmacy, Nantong University, Nantong, 226001, P. R. China
| | - Zhenfeng Cheng
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target School of Pharmacy, Nantong University, Nantong, 226001, P. R. China
| | - Yushan Xie
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target School of Pharmacy, Nantong University, Nantong, 226001, P. R. China
| | - Yunhui Gu
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target School of Pharmacy, Nantong University, Nantong, 226001, P. R. China
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4
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Wen T, Liang B, Liang J, Wang D, Shi J, Xu S, Zhu W, Chen X, Zhu Z. Copper-Promoted N-Alkylation and Bromination of Arylamines/Indazoles Using Alkyl Bromides as Reagents for Difunctionalization. J Org Chem 2022; 87:12214-12224. [PMID: 36053202 DOI: 10.1021/acs.joc.2c01356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Practical copper-promoted N-alkylation and bromination of arylamines/indazoles with alkyl bromides are described; the N-alkylation-C-4-bromination and N-dialkylation-C-4-bromination of arylamines, and N-alkylation-C-3-bromination of indazoles, with alkyl bromides have been analyzed. The full use of alkyl bromides as alkylating and brominating building blocks without atom wastage, indicating excellent atom and step economy, has been highlighted. Eco-friendly oxygen and water are the reaction oxidant and byproduct, respectively.
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Affiliation(s)
- Tingting Wen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Baihui Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jiacheng Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Dongyi Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jianyi Shi
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Shengting Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Weidong Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
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5
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Huang J, Chen Z. The Alkynylative Difunctionalization of Alkenes. Chemistry 2022; 28:e202201519. [DOI: 10.1002/chem.202201519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Jie Huang
- School of Chemistry and Chemical Engineering Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Zhi‐Min Chen
- School of Chemistry and Chemical Engineering Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
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6
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Yang G, Wu H, Gallarati S, Corminboeuf C, Wang Q, Zhu J. Migrative Carbofluorination of Saturated Amides Enabled by Pd-Based Dyotropic Rearrangement. J Am Chem Soc 2022; 144:14047-14052. [PMID: 35916403 DOI: 10.1021/jacs.2c06578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Directly editing an all-carbon quaternary carbon itself of nonstrained acyclic molecules remains underexploited despite the recent advances in the fields of both C-H and C-C bond activation. Herein, we report a palladium-catalyzed migrative carbofluorination of saturated amides enabled by the activation of both the C(sp3)-H and the Cquaternary-Cσ bonds. In this transformation, the α-quaternary carbon of Weinreb amides is converted to α-tertiary fluoride with concurrent migration of an aryl or an amido group from the α- to β-carbon. DFT calculations indicate that the dyotropic rearrangement proceeds through an unusual anti-selective [2.1.0] bicyclic transition state. The reaction, compatible with a broad range of functional groups, is stereospecific and is applicable to the synthesis of enantioenriched products.
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Affiliation(s)
- Guoqiang Yang
- Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Hua Wu
- Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Simone Gallarati
- Laboratory for Computational Molecular Design (LCMD), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Clémence Corminboeuf
- Laboratory for Computational Molecular Design (LCMD), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
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7
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The crystal structure of 17-(bromoethynyl)-17-hydroxy-10, 13-dimethyl- 1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3 H-cyclopenta[ a]phenanthren-3-one, C 21H 27BrO 2. Z KRIST-NEW CRYST ST 2022. [DOI: 10.1515/ncrs-2022-0165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C21H27BrO2, monoclinic, P21 (no. 4), a = 6.6220(14) Å, b = 11.7640(2) Å, c = 11.8485(2) Å, β = 95.0757(19)° V = 919.39(3) Å3, Z = 2, R
gt
(F) = 0.0264, wR
ref
(F
2) = 0.0695, T = 150 K, Flack-parameter = 0.007(13).
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8
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Ji X, Nie J, Peng X, Hu J, Xu X, Huang Y, Li Y, Jiang H. Palladium-Catalyzed Cross Haloalkynylation of Haloalkynes. Org Lett 2022; 24:3384-3388. [PMID: 35481743 DOI: 10.1021/acs.orglett.2c01161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we have developed a robust Pd-catalyzed haloalkynylation of haloalkynes for the synthesis of dihaloalkenyne derivatives. This cross-haloalkynylation reaction proceeds in a highly chemo- and regioselective manner under mild conditions in the presence of two slightly structurally different haloalkynes and shows strong functional group tolerance under ligand- and base-free conditions.
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Affiliation(s)
- Xiaoliang Ji
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Jinli Nie
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Xin Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Jinhui Hu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Xuetao Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Yubing Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529090, China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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9
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Fernández-Canelas P, Barrio P, González JM. Merging gold catalysis and haloethynyl frames: emphasis on halide-shift processes. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Tobrman T, Oeser P, Petrenko A, Edlová T, Čubiňák M, Koudelka J. Halocyclobutanol Dehydration En Route to Halocyclobutenes. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1794-0685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractA new method for the preparation of halocyclobutenes is described. The developed process involves the dehydration of halocyclobutanols by using tetrafluoroboric acid–diethyl ether complex in dichloromethane at room temperature. The process allows for high yields of halocyclobutenes to be achieved by using alcohols that do not trigger the formation of isomeric allylic halides.
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11
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Zhang L, Wei C, Wu J, Liu D, Yao Y, Chen Z, Liu J, Yao CJ, Li D, Yang R, Xia Z. Photoinduced inverse Sonogashira coupling reaction. Chem Sci 2022; 13:7475-7481. [PMID: 35872819 PMCID: PMC9241966 DOI: 10.1039/d2sc01933g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/27/2022] [Indexed: 12/17/2022] Open
Abstract
A transition-metal and photocatalyst-free, photoinduced inverse Sonogashira coupling reaction was developed. Under visible-light irradiation, the excited state iodoalkyne acted as an “alkynyl radical synthetic equivalent”.
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Affiliation(s)
- Lizhu Zhang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Cunbo Wei
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jiawen Wu
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Dan Liu
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Yinchao Yao
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Zhuo Chen
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jianxun Liu
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Chang-Jiang Yao
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Dinghua Li
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Rongjie Yang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Zhonghua Xia
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
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12
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SOMOphilic Alkynylation of Unreactive Alkenes Enabled by Iron-Catalyzed Hydrogen Atom Transfer. Molecules 2021; 27:molecules27010033. [PMID: 35011265 PMCID: PMC8746543 DOI: 10.3390/molecules27010033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
We report an efficient and practical iron-catalyzed hydrogen atom transfer protocol for assembling acetylenic motifs into functional alkenes. Diversities of internal alkynes could be obtained from readily available alkenes and acetylenic sulfones with excellent Markovnikov selectivity. An iron hydride hydrogen atom transfer catalytic cycle was described to clarify the mechanism of this reaction.
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13
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Abstract
Metal catalysis has revolutionized synthetic chemistry, leading to entirely new, very efficient transformations, which enable access to complex functionalized molecules. One such new transformation method is the haloalkynylation reaction, in which both a halogen atom and an alkynyl unit are transferred to an unsaturated carbon‐carbon bond. This minireview summarizes the development of metal‐catalyzed haloalkynylation reactions since their beginning about a decade ago. So far, arynes, alkenes and alkynes have been used as unsaturated systems and the reactivities of these systems are summarized in individual chapters of the minireview. Especially, the last few years have witnessed a rapid development due to gold‐catalyzed reactions. Here, we discuss how the choice of the catalytic system influences the regio‐ and stereoselectivity of the addition.
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Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstraße 7, 45117, Essen, Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstraße 7, 45117, Essen, Germany
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14
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Ano Y, Kawai N, Chatani N. Palladium-catalyzed 1,1-alkynylbromination of alkenes with alkynyl bromides. Chem Sci 2021; 12:12326-12332. [PMID: 34603662 PMCID: PMC8480334 DOI: 10.1039/d1sc02873a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/13/2021] [Indexed: 12/17/2022] Open
Abstract
The palladium-catalyzed 1,1-alkynylbromination of terminal alkenes with a silyl-protected alkynyl bromide is reported. The method tolerates a diverse range of alkenes including vinylarenes, acrylates, and even electronically unbiased alkene derivatives to afford propargylic bromides regioselectively. Mechanistic studies and DFT calculations indicate that the 1,1-alkynylbromination reaction proceeds via the migration of the Pd center followed by the formation of a π-allenyl Pd intermediate, leading to the stereoselective reductive elimination of the C(sp3)–Br bond at the propargylic positon. The first Pd-catalyzed 1,1-alkynylbromination of terminal alkenes using alkynyl bromides, which provides direct access to a variety of functionalized propargylic bromides without the need for an external brominating reagent, is reported.![]()
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Affiliation(s)
- Yusuke Ano
- Department of Applied Chemistry, Faculty of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan .,Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Natsuki Kawai
- Department of Applied Chemistry, Faculty of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
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15
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Highly efficient synthesis of 1,2-disubstituted acetylenes derivatives from the cross-coupling reactions of 1-bromoalkynes with organotitanium reagents. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Cao J, Wu H, Wang Q, Zhu J. C-C bond activation enabled by dyotropic rearrangement of Pd(IV) species. Nat Chem 2021; 13:671-676. [PMID: 34031566 PMCID: PMC7611116 DOI: 10.1038/s41557-021-00698-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 04/08/2021] [Indexed: 11/09/2022]
Abstract
The weak carbon–metal bond combined with the kinetic inertness of carbon–carbon bond renders the metal catalyzed C–C bond activation to be highly challenging. Most of the reported C–C bond activation methodologies involve the strain-releasing cleavage of small rings to compensate the unfavorable kinetic and thermodynamic penalties associated with the C–C bond cleavage. Here we report that the 1,2-positional interchange of vicinal C–C and C–Pd(IV) bonds (dyotropic rearrangement) can be realized in a stereospecific manner under mild conditions, giving access to quaternary carbon-palladium bonds. An enantioselective synthesis of medicinally relevant fluorinated cyclopentanes, featuring this rearrangement as a key step, has been developed. We anticipate that implementing a Pd-based dyotropic rearrangement in reaction design could provide a new dimension in the development of Pd-catalyzed transformations.
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Affiliation(s)
- Jian Cao
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, P. R. China
| | - Hua Wu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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17
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Didier D, Reiners F. Uncommon Four-Membered Building Blocks - Cyclobutenes, Azetines and Thietes. CHEM REC 2021; 21:1144-1160. [PMID: 33734571 DOI: 10.1002/tcr.202100011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 12/15/2022]
Abstract
Strained ring systems have gained considerable importance over the last few years for their implication in natural product syntheses or in drug discovery programs. We present herein a recollection of our work on the construction and functionalization of unsaturated four-membered carbo- and heterocycles in the context of the literature, as well as their applications in further reactions.
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Affiliation(s)
- Dorian Didier
- Department of Chemistry, Ludwig-Maximilians Universität, Butenandtstraße 5-13, 81377, Munich, Germany
| | - Felix Reiners
- Department of Chemistry, Ludwig-Maximilians Universität, Butenandtstraße 5-13, 81377, Munich, Germany
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18
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Pradhan TR, Paudel M, Harper JL, Cheong PHY, Park JK. Characterization and Utilization of the Elusive α,β-Unsaturated N-Tosyliminium: the Synthesis of Highly Functionalizable Skipped Halo Enynes. Org Lett 2021; 23:1427-1433. [PMID: 33538600 DOI: 10.1021/acs.orglett.1c00103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A formal haloalkynylation of allenamides has been described for the synthesis of highly stereo- and regioselective skipped halo enynes. Exclusive γ-regioselectivity is achieved through the intermediacy of a conjugated N-tosyliminium intermediate-direct evidence for the formation of which was validated by NMR and HRMS. Quantum mechanical computations reveal that the reactive intermediate geometry is key to controlling the 1,2- or 1,4-regioselectivity of alkyne interception. Divergent access to elusive unsaturated systems has also been reported.
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Affiliation(s)
- Tapas R Pradhan
- Department of Chemistry and Institution for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Mukti Paudel
- Department of Chemistry and Institution for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Jordan L Harper
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Jin Kyoon Park
- Department of Chemistry and Institution for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
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19
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Huang G, Li J, Li J, Li J, Sun M, Zhou P, Chen L, Huang Y, Jiang S, Li Y. Access to Substituted Thiophenes through Xanthate-Mediated Vinyl C(sp 2)-Br Bond Cleavage and Heterocyclization of Bromoenynes. J Org Chem 2020; 85:13037-13049. [PMID: 32909752 DOI: 10.1021/acs.joc.0c01733] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An environmentally sustainable strategy for the chemoselective heterocyclization of bromoenynes through a transition-metal-free sulfuration/cyclization process is reported. Using inexpensive and safe EtOCS2K as a thiol surrogate and tetrabutylphosphonium bromide and H2O as a mixed solvent, the reaction provided a range of substituted thiophenes in moderate to good yields. In addition, 2,3,4,5-tetrasubstituted thiophenes were able to be prepared under mild reaction conditions by electrophilic heterocyclization with NH4I and EtOCS2K in good yields.
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Affiliation(s)
- Guoling Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Jian Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Jianrong Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Jiaming Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Minghua Sun
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Peng Zhou
- College of Chemistry, Guangdong University of Petrochemical Technology, Guangdu 2nd road, Maoming, Guangdong Province 525000, China
| | - Lu Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Yubing Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Shaohua Jiang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
| | - Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China
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20
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Transition‐Metal‐Catalyzed Carbohalogenative 1,2‐Difunctionalization of C−C Multiple Bonds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000630] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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21
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Lauro FV, Marcela RN, Maria LR, Francisco DC, Alejandra GEE, Virginia MA, Yazmin OA. Design and synthesis of a new furan-steroid-propanone derivative using some chemical strategies. Steroids 2020; 160:108654. [PMID: 32439408 DOI: 10.1016/j.steroids.2020.108654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/07/2020] [Accepted: 05/14/2020] [Indexed: 11/18/2022]
Abstract
There are several reports for the preparation of furan derivatives using some protocols which requires special conditions. In this way, the aim of this study was to synthesize a new furan-steroid-propanone derivative from both 17α-ethynylestradiol and 2-nitro-17α-ethynylestradiol using some series of reactions such as aldolization, 2 + 2 addition and etherification. The chemical structure was evaluated through both 1H NMR and 13C NMR spectroscopic analysis. The results showed a good yielding from furan-steroid derivative. In conclusion, this investigation provides a facile synthesis of a new furan-steroid-propanone derivative, using some reagents which are not expensive and do not require special conditions for handling.
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Affiliation(s)
- Figueroa-Valverde Lauro
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Ex Hacienda Kalá s/n, 24085 San Francisco de Campeche, Mexico.
| | - Rosas-Nexticapa Marcela
- Facultad de Nutrición, Universidad Veracruzana. Médicos y Odontólogos s/n, 91010 Xalapa, Veracruz, Mexico.
| | - Lopez-Ramos Maria
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Ex Hacienda Kalá s/n, 24085 San Francisco de Campeche, Mexico
| | - Diaz Cedillo Francisco
- Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Prol. Carpio y Plan de Ayala s/n Col, Santo Tomas, D.F. C.P. 11340, Mexico
| | | | - Mateu-Armand Virginia
- Facultad de Nutrición, Universidad Veracruzana. Médicos y Odontólogos s/n, 91010 Xalapa, Veracruz, Mexico
| | - Ortiz-Ake Yazmin
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Ex Hacienda Kalá s/n, 24085 San Francisco de Campeche, Mexico
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22
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Kreuzahler M, Haberhauer G. Gold(I)-Catalyzed Haloalkynylation of Aryl Alkynes: Two Pathways, One Goal. Angew Chem Int Ed Engl 2020; 59:9433-9437. [PMID: 32078231 PMCID: PMC7318269 DOI: 10.1002/anie.201916027] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/29/2020] [Indexed: 11/29/2022]
Abstract
Haloalkynylation reactions provide an efficient method for the simultaneous introduction of a halogen atom and an acetylenic unit. For the first time, we report a gold(I)‐catalyzed haloalkynylation of aryl alkynes that delivers exclusively the cis addition product. This method enables the simple synthesis of conjugated and halogenated enynes in yields of up to 90 %. Notably, quantum chemical calculations reveal an exceptional interplay between the place of the attack at the chloroacetylene: No matter which C−C bond is formed, the same enyne product is always formed. This is only possible through rearrangement of the corresponding skeleton. Hereby, one reaction pathway proceeds via a chloronium ion with a subsequent aryl shift; in the second case the corresponding vinyl cation is stabilized by a 1,3‐chlorine shift. 13C‐labeling experiments confirmed that the reaction proceeds through both reaction pathways.
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Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstraße 7, 45117, Essen, Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstraße 7, 45117, Essen, Germany
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23
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Kreuzahler M, Haberhauer G. Gold(I)‐katalysierte Haloalkinylierung von Arylalkinen: Zwei Wege, ein Ziel. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916027] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische ChemieUniversität Duisburg-Essen Universitätsstraße 7 45117 Essen Deutschland
| | - Gebhard Haberhauer
- Institut für Organische ChemieUniversität Duisburg-Essen Universitätsstraße 7 45117 Essen Deutschland
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24
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Khan R, Chen J, Fan B. Versatile Catalytic Reactions of Norbornadiene Derivatives with Alkynes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901494] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ruhima Khan
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Kunming 650500 People's Republic of China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Kunming 650500 People's Republic of China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Kunming 650500 People's Republic of China
- School of Chemistry and EnvironmentYunnan Minzu University Yuehua Street Kunming 650500 People's Republic of China
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25
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Petko D, Koh S, Tam W. Transition Metal-Catalyzed Reactions of Alkynyl Halides. Curr Org Synth 2020; 16:546-582. [PMID: 31984930 DOI: 10.2174/1570179416666190329200616] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/08/2019] [Accepted: 02/20/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Transition metal-catalyzed reactions of alkynyl halides are a versatile means of synthesizing a wide array of products. Their use is of particular interest in cycloaddition reactions and in constructing new carbon-carbon and carbon-heteroatom bonds. Transition metal-catalyzed reactions of alkynyl halides have successfully been used in [4+2], [2+2], [2+2+2] and [3+2] cycloaddition reactions. Many carbon-carbon coupling reactions take advantage of metal-catalyzed reactions of alkynyl halides, including Cadiot-Chodkiewicz, Suzuki-Miyaura, Stille, Kumada-Corriu and Inverse Sonogashira reactions. All the methods of constructing carbon-nitrogen, carbon-oxygen, carbon-phosphorus, carbon-sulfur, carbon-silicon, carbon-selenium and carbon-tellurium bonds employed alkynyl halides. OBJECTIVE The purpose of this review is to highlight and summarize research conducted in transition metalcatalyzed reactions of alkynyl halides in recent years. The focus will be placed on cycloaddition and coupling reactions, and their scope and applicability to the synthesis of biologically important and industrially relevant compounds will be discussed. CONCLUSION It can be seen from the review that the work done on this topic has employed the use of many different transition metal catalysts to perform various cycloadditions, cyclizations, and couplings using alkynyl halides. The reactions involving alkynyl halides were efficient in generating both carbon-carbon and carbonheteroatom bonds. Proposed mechanisms were included to support the understanding of such reactions. Many of these reactions face retention of the halide moiety, allowing additional functionalization of the products, with some new products being inaccessible using their standard alkyne counterparts.
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Affiliation(s)
- Dina Petko
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Samuel Koh
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - William Tam
- Guelph-Waterloo Center for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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26
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García‐Fernández PD, Izquierdo C, Iglesias‐Sigüenza J, Díez E, Fernández R, Lassaletta JM. Au
I
‐Catalyzed Haloalkynylation of Alkenes. Chemistry 2019; 26:629-633. [PMID: 31702073 DOI: 10.1002/chem.201905078] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Pedro D. García‐Fernández
- Departamento de Química Orgánica (Universidad de Sevilla) and Centro, de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Cristina Izquierdo
- Departamento de Química Orgánica (Universidad de Sevilla) and Centro, de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Javier Iglesias‐Sigüenza
- Departamento de Química Orgánica (Universidad de Sevilla) and Centro, de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Elena Díez
- Departamento de Química Orgánica (Universidad de Sevilla) and Centro, de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - Rosario Fernández
- Departamento de Química Orgánica (Universidad de Sevilla) and Centro, de Innovación en Química Avanzada (ORFEO-CINQA) C/ Prof. García González 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-US) and Centro de Innovación en Química Avanzada (ORFEO-CINQA) C/ Américo Vespucio 49 41092 Sevilla Spain
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27
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Li J, Yang S, Wu W, Jiang H. Palladium‐Catalyzed Cascade Cyclization/Alkynylation Reactions. Chem Asian J 2019; 14:4114-4128. [DOI: 10.1002/asia.201901202] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/19/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 China
| | - Shaorong Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou 510640 China
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28
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Li M, Fang S, Zheng J, Jiang H, Wu W. Direct Assembly of Polysubstituted Propiolamidinates via Palladium-Catalyzed Multicomponent Reaction of Isocyanides. Org Lett 2019; 21:8439-8443. [DOI: 10.1021/acs.orglett.9b03201] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Meng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Songjia Fang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Jia Zheng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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29
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He D, Huang L, Li J, Wu W, Jiang H. Palladium-Catalyzed Nitrile-Assisted C(sp3)–Cl Bond Formation for Synthesis of Dichlorides. Org Lett 2019; 21:8308-8311. [DOI: 10.1021/acs.orglett.9b03066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dandan He
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Liangbin Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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30
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Meng X, Li J, Zuo Y, Hu C, Su Z. Theoretical Study on Asymmetric [2 + 2] Cycloaddition of an Alkynone with a Cyclic Enol Silyl Ether Catalyzed by a Chiral N,N′-Dioxide-Zn(II) Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiangxiang Meng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, People’s Republic of China
| | - Jing Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, People’s Republic of China
| | - Yini Zuo
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, People’s Republic of China
| | - Changwei Hu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, People’s Republic of China
| | - Zhishan Su
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, People’s Republic of China
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31
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Kreuzahler M, Haberhauer G. Gold(I)-Catalyzed Chloroalkynylation of 1,1-Disubstituted Alkenes via 1,3-Chlorine Shift: A Combined Experimental and Theoretical Study. J Org Chem 2019; 84:8210-8224. [PMID: 31192596 DOI: 10.1021/acs.joc.9b01371] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstr. 7, D-45117 Essen, Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Universität Duisburg-Essen, Universitätsstr. 7, D-45117 Essen, Germany
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32
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Zhang Y, Huang C, Lin X, Hu Q, Hu B, Zhou Y, Zhu G. Modular Synthesis of Alkylarylazo Compounds via Iron(III)-Catalyzed Olefin Hydroamination. Org Lett 2019; 21:2261-2264. [PMID: 30869900 DOI: 10.1021/acs.orglett.9b00540] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N-N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult or perhaps impossible to access using other methods.
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Affiliation(s)
- Yan Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Chenchao Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Xinru Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Qi Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Boyue Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
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33
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Wu W, Li C, Li J, Jiang H. Palladium-catalyzed cascade carboesterification of norbornene with alkynes. Org Biomol Chem 2019; 16:8495-8504. [PMID: 30187057 DOI: 10.1039/c8ob01799a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient and convenient palladium-catalyzed cascade carboesterification of norbornenes (NBE) with alkynes has been accomplished to afford functionalized α-methylene γ-lactone and tetrahydrofuran derivatives in good to excellent yields. This new strategy exhibits excellent atom- and step-economy, good functional group tolerance and broad substrate scope. In particular, NBE-palladium species was proposed to be the key intermediate in the catalytic cycle to suppress the β-H elimination process. Notably, the developed protocol provides a straightforward and practical tool for the construction of diverse oxygen-containing heterocycle frameworks, illustrating a promising application in synthetic and pharmaceutical chemistry.
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Affiliation(s)
- Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China
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34
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Luo X, Chen X, Chen L, Zhang K, Li Y. Xanthate-mediated synthesis of (E)-alkenes by semi-hydrogenation of alkynes using water as the hydrogen donor. Chem Commun (Camb) 2019; 55:2170-2173. [PMID: 30698604 DOI: 10.1039/c9cc00128j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Semi-hydrogenation of alkynes is one of the most widely used methods for obtaining alkenes in laboratory preparation and in industry. Transition metal catalysts have been extensively studied for this transformation, but the tolerance of functional groups, such as pyridine, -OH, -NH2, -Bpin, and halides, and the toxicity of the trace amount of transition metal catalysts are still highly challenging. In this study, we report a general and robust strategy to achieve the semi-hydrogenation of alkynes using inexpensive and commercially available xanthate as the mediator. Mechanism studies support a non-radical process and H2O acts as the hydrogen donor.
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Affiliation(s)
- Xianglin Luo
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
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35
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Li Z, Zheng J, Li C, Wu W, Jiang H. Palladium-Catalyzed Three-Component Coupling Reaction of Allyl Carboxylates, Norbornenes and Diboronates Involving Sequential Olefins Insertion and Borylation Reaction. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201800536] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zun Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Jia Zheng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Chunsheng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 China
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36
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Wu W, Fang S, Jiang G, Li M, Jiang H. Palladium-catalyzed regioselective C–H alkynylation of indoles with bromoalkynes in water. Org Chem Front 2019. [DOI: 10.1039/c8qo01261j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A palladium-catalyzed regioselective C(sp2)–H alkynylation between indoles and bromoalkynes in water has been developed, affording diverse functionalized 2-alkynylindoles in good yields.
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Affiliation(s)
- Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
| | - Songjia Fang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Guangbin Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Meng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
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37
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Fang S, Jiang G, Li M, Liu Z, Jiang H, Wu W. Palladium-catalyzed regioselective C–H alkynylation of indoles with haloalkynes: access to functionalized 7-alkynylindoles. Chem Commun (Camb) 2019; 55:13769-13772. [DOI: 10.1039/c9cc07263b] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A palladium-catalyzed exclusively selective alkynylation of indoles has been reported, affording concise access to 7-alkynylindoles from readily available starting materials.
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Affiliation(s)
- Songjia Fang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Guangbin Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Meng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Zhenying Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou 510640
- China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
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38
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Shao XB, Jiang X, Li QH, Zhao ZG. Highly efficient synthesis of 1,2-disubstituted acetylenes derivatives from the cross-coupling reactions of 1-bromoalkynes with organoalane reagents. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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39
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Pradhan TR, Kim HW, Park JK. Harnessing the Polarizability of Conjugated Alkynes toward [2 + 2] Cycloaddition, Alkenylation, and Ring Expansion of Indoles. Org Lett 2018; 20:5286-5290. [PMID: 30141335 DOI: 10.1021/acs.orglett.8b02230] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Reported is the utilization of electronically biased conjugated alkynes in the development of highly diastereo- and regioselective dearomative [2 + 2] cycloadditions, alkenylations, and ring expansions of electron-rich indoles. Regioselective protonations of cross- and linear-conjugated alkynes were found to be crucial for accessing various cyclobutene-fused indoline and alkenylated indole derivatives. Furthermore, the facile ring expansion of [2 + 2] keto adducts, which were successfully synthesized from ynones, provided 1 H-benzo[ b]azepine scaffolds.
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Affiliation(s)
- Tapas R Pradhan
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Hong Won Kim
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Jin Kyoon Park
- The Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , Korea
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40
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Bai YB, Luo Z, Wang Y, Gao JM, Zhang L. Au-Catalyzed Intermolecular [2+2] Cycloadditions between Chloroalkynes and Unactivated Alkenes. J Am Chem Soc 2018; 140:5860-5865. [PMID: 29618202 PMCID: PMC6488029 DOI: 10.1021/jacs.8b01813] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The [2+2] cycloaddition is a versatile strategy for the synthesis of strained cyclobutenes of high synthetic value. In this study, two efficient intermolecular [2+2] cycloadditions between two different types of chloroalkynes and unactivated alkene are realized with gold catalysis. Of significance is that the reaction works with challenging monosubstituted unactivated alkenes, which is unprecedented in gold catalysis and scarcely documented in other metal-catalyzed/promoted reactions; moreover, the reaction exhibits excellent regioselectivities, which are much better than those reported in literature. With 1,2-disubstituted unactivated alkenes, the reaction is largely stereospecific. The cyclobutene products can be prepared in nearly gram scale and readily undergo further reactions including various cross-coupling reactions using the C(sp2)-Cl and/or C(sp2)-SPh bond, which in turn substantially broaden the scope of accessible cyclobutenes and enhance the synthetic utility of this bimolecular reaction.
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Affiliation(s)
- Yu-Bin Bai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zaigang Luo
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Yuguang Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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41
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Synthesis of 1,1,1,3,3,3-hexafluoroprop-2-yl 4-bromo-2-oxobut-3-ynoate and its [2+2] cycloaddition to alkenes. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-2028-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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42
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Zeng X, Li J, Ng CK, Hammond GB, Xu B. (Radio)fluoroclick Reaction Enabled by a Hydrogen-Bonding Cluster. Angew Chem Int Ed Engl 2018; 57:2924-2928. [PMID: 29276938 PMCID: PMC6233894 DOI: 10.1002/anie.201711341] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Indexed: 12/21/2022]
Abstract
We have developed a widely applicable nucleophilic (radio)fluoroclick reaction of ynamides with readily available and easy-to-handle KF(18 F). The reactions exhibited high functional-group tolerance and needed only an ambient atmosphere. This 18 F addition to C-C unsaturated bonds proceeded with extraordinarily high radiochemical yields.
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Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, China
| | - Junling Li
- Department of Diagnostic Radiology, University of Louisville, Louisville, KY 40292 USA
| | - Chin K. Ng
- Department of Diagnostic Radiology, University of Louisville, Louisville, KY 40292 USA
| | - Gerald B. Hammond
- Department of Chemistry, University of Louisville, Louisville, KY 40292 USA.,
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology Donghua University, Shanghai 201620, China
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43
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Zeng X, Li J, Ng CK, Hammond GB, Xu B. (Radio)fluoroclick Reaction Enabled by a Hydrogen-Bonding Cluster. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; Shanghai 201620 China
| | - Junling Li
- Department of Diagnostic Radiology; University of Louisville; Louisville KY 40292 USA
| | - Chin K. Ng
- Department of Diagnostic Radiology; University of Louisville; Louisville KY 40292 USA
| | - Gerald B. Hammond
- Department of Chemistry; University of Louisville; Louisville KY 40292 USA
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; Shanghai 201620 China
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44
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Li J, Li C, Ouyang L, Li C, Yang S, Wu W, Jiang H. Palladium-Catalyzed Regioselective Three-Component Cascade Bisthiolation of Terminal Alkynes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701417] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Can Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Lu Ouyang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Chunsheng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Shaorong Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 People's Republic of China
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45
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Jiang G, Hu W, Li J, Zhu C, Wu W, Jiang H. Palladium-catalyzed primary amine-directed regioselective mono- and di-alkynylation of biaryl-2-amines. Chem Commun (Camb) 2018; 54:1746-1749. [DOI: 10.1039/c7cc09308j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Palladium-catalyzed primary amine-directed controlled alkynylation of biaryl-2-amines has been developed by using haloalkynes as an alkynylating reagent.
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Affiliation(s)
- Guangbin Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Weigao Hu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
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46
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Zeng X, Lu Z, Liu S, Hammond GB, Xu B. Metal-free, Regio-, and Stereo-Controlled Hydrochlorination and Hydrobromination of Ynones and Ynamides. J Org Chem 2017; 82:13179-13187. [PMID: 29166765 PMCID: PMC5735994 DOI: 10.1021/acs.joc.7b02257] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
![]()
We developed an atom-economical
and metal-free method for the regio-
and stereo-selective hydrohalogenation of ynones and ynamides using
easy to handle DMPU/HX (X = Br or Cl) reagents. The reaction operates
under mild conditions and a range of functional groups is well tolerated.
We propose that the hydrohalogenation of ynones gives the anti-addition products via a concerted multimolecular AdE3 mechanism and that the hydrohalogenation of ynamides produces
the syn-addition products via a cationic keteniminium
intermediate.
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Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , 2999 North Renmin Lu, Shanghai 201620, China
| | - Zhichao Lu
- Department of Chemistry, University of Louisville , Louisville, Kentucky 40292, United States
| | - Shiwen Liu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , 2999 North Renmin Lu, Shanghai 201620, China
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville , Louisville, Kentucky 40292, United States
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , 2999 North Renmin Lu, Shanghai 201620, China
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47
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Zhu C, Chen P, Zhu R, Jiang G, Lin Z, Wu W, Jiang H. Conversion of Triple Bonds into Single Bonds in a Domino Carbopalladation with Norbornene. Chem Asian J 2017; 12:2991-2995. [DOI: 10.1002/asia.201701241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/16/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Pengquan Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Rui Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Guangbin Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Zhiming Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province; School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou 510640 P. R. China
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48
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708435] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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49
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Jiao Z, Shi Q, Zhou JS. Asymmetric Intermolecular Heck Reaction of Propargylic Acetates and Cycloalkenes to Access Fused Cyclobutenes. Angew Chem Int Ed Engl 2017; 56:14567-14571. [DOI: 10.1002/anie.201708435] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/28/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiwei Jiao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Qi Shi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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50
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He L, Li X. C S and C N bond formation via Mn-promoted oxidative cascade reaction: Synthesis of C3-sulfenated indoles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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