1
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Chen W, Sheng D, Jiang YF, Zhu WC, Rao W, Shen SS, Yang ZY, Wang SY. Nickel-Catalyzed Acid Chlorides with Tetrasulfides for the Synthesis of Thioesters and Acyl Disulfides. J Org Chem 2023; 88:15871-15880. [PMID: 37882877 DOI: 10.1021/acs.joc.3c01948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Herein, we report a novel method for the synthesis of thioesters and acyl disulfides via nickel-catalyzed reductive cross-electrophile coupling of acid chlorides with tetrasulfides. This approach for the synthesis of thioesters and acyl disulfides is convenient and practical under mild reaction conditions, relying on easy availability. In addition, a wide range of thioesters and acyl disulfides were obtained in medium to good yields with good functional group tolerance. Moreover, thioesters and acyl disulfides can also be prepared at the gram scale, indicating that they have certain potential for industrial application.
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Affiliation(s)
- Wang Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China
| | - Daopeng Sheng
- Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yi-Fan Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China
| | - Wei-Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China
| | - Weidong Rao
- Key Laboratory of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Shu-Su Shen
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 99, Xuefu Road, Huqiu District, Suzhou, 215009, PR China
| | - Zhao-Ying Yang
- Soochow College, Soochow University, Suzhou, 215123, China
| | - Shun-Yi Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China
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2
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Nakamura K, Kumagai Y, Kobayashi A, Suzuki M, Yoshida S. Facile synthesis of sulfinate esters from aryl iodides via direct oxidation of thioesters. Org Biomol Chem 2023; 21:6886-6891. [PMID: 37602371 DOI: 10.1039/d3ob01108a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
A practical method to synthesize sulfinate esters from aryl iodides is disclosed. Direct oxidation of thioesters prepared by copper-catalyzed C-S formation of aryl iodides realized the efficient synthesis of sulfinate esters. Due to the good accessibility of aryl iodides, a wide variety of sulfinate esters were prepared from easily available starting materials such as carboxylic acids and anilines.
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Affiliation(s)
- Keisuke Nakamura
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
| | - Yukiko Kumagai
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
| | - Akihiro Kobayashi
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, 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
| | - Minori Suzuki
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, 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
| | - Suguru Yoshida
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
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3
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Zheng W, Xu Y, Lin L. Nickel‐Catalyzed Thioesterification Enabled by a Visible‐Light Organophotoredox Catalyst under Mild Conditions. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100264] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Wanyao Zheng
- Zhangdayu School of Chemistry Dalian University of Technology No. 2 Linggong Road, Gangjingzi District Dalian 116024 Liaoning China
| | - Yongjie Xu
- Zhangdayu School of Chemistry Dalian University of Technology No. 2 Linggong Road, Gangjingzi District Dalian 116024 Liaoning China
| | - Luqing Lin
- Zhangdayu School of Chemistry Dalian University of Technology No. 2 Linggong Road, Gangjingzi District Dalian 116024 Liaoning China
- Global Station for Biosurfaces and Drug Discovery Global Institution for Collaborative Research and Education (GI-CoRE) Hokkaido University Kita-12 Nishi-6 Sapporo Hokkaido 060-0812 Japan
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4
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Zhao F, Wu XF. Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions. Org Chem Front 2021. [DOI: 10.1039/d0qo01479f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.
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Affiliation(s)
- Fengqian Zhao
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
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5
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Jiang X, Wang G, Zheng Z, Yu X, Hong Y, Xia H, Yu C. Autocatalytic Synthesis of Thioesters via Thiocarbonylation of gem-Difluoroalkenes. Org Lett 2020; 22:9762-9766. [PMID: 33285069 DOI: 10.1021/acs.orglett.0c03860] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report a new method for the synthesis of acyethanethioates via thiocarbonylation of gem-difluoroalkenes with thiols. This reaction provides a new pathway to prepare thioesters under mild conditions without the use of any additives. Mechanistic studies revealed that in situ generated HF facilitated the C-F bond cleavage in an autocatalytic manner.
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Affiliation(s)
- Xinpeng Jiang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Guan Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Zicong Zheng
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Xiaohui Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Ye Hong
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Haoqi Xia
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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6
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Qi X, Bao ZP, Yao XT, Wu XF. Nickel-Catalyzed Thiocarbonylation of Arylboronic Acids with Sulfonyl Chlorides for the Synthesis of Thioesters. Org Lett 2020; 22:6671-6676. [DOI: 10.1021/acs.orglett.0c02541] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xinxin Qi
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, People’s Republic of China
| | - Zhi-Peng Bao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, People’s Republic of China
| | - Xin-Tong Yao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, People’s Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, People’s Republic of China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, Rostock 18059, Germany
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7
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Zhong Y, Xu X, Xing Q, Yang S, Gou J, Gao Z, Yu B. Furfuryl Cation Induced Three-Component Reaction to Synthesize Triazole-Substituted Thioesters. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000299] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ying Zhong
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Song Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology; Changzhou University; 213164 Changzhou China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Normal University; 710062 Xi'an China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
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8
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Skácel J, Dračínský M, Janeba Z. Synthesis of Tetrasubstituted Thiophenes via Direct Metalation. J Org Chem 2020; 85:788-797. [PMID: 31859495 DOI: 10.1021/acs.joc.9b02803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Thiophene moiety can be derivatized by various synthetic procedures. The most convenient method seems to be derivatization via direct metalation, but synthesis of polysubstituted thiophenes bearing reactive groups is difficult because of high reactivity of organometallic reagents. This work reports the preparation of complex heterocyclic compounds using direct metalation of thiophenes with various reagents (Knochel-Hauser bases, LDA) as an efficient synthetic tool.
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Affiliation(s)
- Jan Skácel
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo nám. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo nám. 2 , CZ-16610 Prague 6 , Czech Republic
| | - Zlatko Janeba
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo nám. 2 , CZ-16610 Prague 6 , Czech Republic
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9
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Zhang Y, Ji P, Hu W, Wei Y, Huang H, Wang W. Organocatalytic Transformation of Aldehydes to Thioesters with Visible Light. Chemistry 2019; 25:8225-8228. [DOI: 10.1002/chem.201900932] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Yueteng Zhang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Peng Ji
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Wenbo Hu
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Yongyi Wei
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - He Huang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Wei Wang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
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10
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Hirschbeck V, Böldl M, Gehrtz PH, Fleischer I. Tandem Acyl Substitution/Michael Addition of Thioesters with Vinylmagnesium Bromide. Org Lett 2019; 21:2578-2582. [DOI: 10.1021/acs.orglett.9b00538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vera Hirschbeck
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Marlene Böldl
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Paul H. Gehrtz
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Ivana Fleischer
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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11
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Hirschbeck V, Gehrtz PH, Fleischer I. Metal-Catalyzed Synthesis and Use of Thioesters: Recent Developments. Chemistry 2018; 24:7092-7107. [DOI: 10.1002/chem.201705025] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Vera Hirschbeck
- Department of Organic Chemistry; University of Regensburg; Universitaetsstrasse 31 93053 Regensburg Germany
| | - Paul H. Gehrtz
- Department of Organic Chemistry; University of Tuebingen; Auf der Morgenstelle 18 72076 Tuebingen Germany
| | - Ivana Fleischer
- Department of Organic Chemistry; University of Tuebingen; Auf der Morgenstelle 18 72076 Tuebingen Germany
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12
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Kim M, Yu S, Kim JG, Lee S. Palladium-catalyzed carbonylation of thioacetates and aryl iodides for the synthesis of S-aryl thioesters. Org Chem Front 2018. [DOI: 10.1039/c8qo00466h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium-catalyzed carbonylation of thioacetates and aryl iodides provided thioesters in good yields.
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Affiliation(s)
- Myungjin Kim
- Department of Chemistry
- Chonnam National University
- Gwangju
- Republic of Korea
| | - Subeen Yu
- Department of Chemistry
- Chonnam National University
- Gwangju
- Republic of Korea
| | - Jeung Gon Kim
- Department of Chemistry
- Research Institute of Physics and Chemistry
- Chonbuk National University
- Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry
- Chonnam National University
- Gwangju
- Republic of Korea
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13
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Amal Joseph PJ, Priyadarshini S. Copper-Mediated C–X Functionalization of Aryl Halides. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00285] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- P. J. Amal Joseph
- Department
of Chemistry, St. Albert’s College, Ernakulam, Kerala 682018, India
| | - S. Priyadarshini
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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14
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Liu Y, Liu S, Xiao Y. Transition-metal-catalyzed synthesis of phenols and aryl thiols. Beilstein J Org Chem 2017; 13:589-611. [PMID: 28405239 PMCID: PMC5372758 DOI: 10.3762/bjoc.13.58] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/09/2017] [Indexed: 12/28/2022] Open
Abstract
Phenols and aryl thiols are fundamental building blocks in organic synthesis and final products with interesting biological activities. Over the past decades, substantial progress has been made in transition-metal-catalyzed coupling reactions, which resulted in the emergence of new methods for the synthesis of phenols and aryl thiols. Aryl halides have been extensively studied as substrates for the synthesis of phenols and aryl thiols. In very recent years, C-H activation represents a powerful strategy for the construction of functionalized phenols directly from various arenes. However, the synthesis of aryl thiols through C-H activation has not been reported. In this review, a brief overview is given of the recent advances in synthetic strategies for both phenols and aryl thiols.
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Affiliation(s)
- Yajun Liu
- College of Life Science and Medicine, Dalian University of Technology, Panjin 124221, China
| | - Shasha Liu
- College of Life Science and Medicine, Dalian University of Technology, Panjin 124221, China
| | - Yan Xiao
- Department of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, China
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15
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Forbes CR, Sinha SK, Ganguly HK, Bai S, Yap GPA, Patel S, Zondlo NJ. Insights into Thiol-Aromatic Interactions: A Stereoelectronic Basis for S-H/π Interactions. J Am Chem Soc 2017; 139:1842-1855. [PMID: 28080040 PMCID: PMC5890429 DOI: 10.1021/jacs.6b08415] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Thiols can engage favorably with aromatic rings in S-H/π interactions, within abiological systems and within proteins. However, the underlying bases for S-H/π interactions are not well understood. The crystal structure of Boc-l-4-thiolphenylalanine tert-butyl ester revealed crystal organization centered on the interaction of the thiol S-H with the aromatic ring of an adjacent molecule, with a through-space Hthiol···Caromatic distance of 2.71 Å, below the 2.90 Å sum of the van der Waals radii of H and C. The nature of this interaction was further examined by DFT calculations, IR spectroscopy, solid-state NMR spectroscopy, and analysis of the Cambridge Structural Database. The S-H/π interaction was found to be driven significantly by favorable molecular orbital interactions, between an aromatic π donor orbital and the S-H σ* acceptor orbital (a π → σ* interaction). For comparison, a structural analysis of O-H/π interactions and of cation/π interactions of alkali metal cations with aromatic rings was conducted. Na+ and K+ exhibit a significant preference for the centroid of the aromatic ring and distances near the sum of the van der Waals and ionic radii, as expected for predominantly electrostatic interactions. Li+ deviates substantially from Na+ and K+. The S-H/π interaction differs from classical cation/π interactions by the preferential alignment of the S-H σ* toward the ring carbons and an aromatic π orbital rather than toward the aromatic centroid. These results describe a potentially broadly applicable approach to understanding the interactions of weakly polar bonds with π systems.
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Affiliation(s)
- Christina R. Forbes
- Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, United States
| | | | | | - Shi Bai
- Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, United States
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, United States
| | - Sandeep Patel
- Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, United States
| | - Neal J. Zondlo
- Department of Chemistry and Biochemistry, University of Delaware, Newark DE 19716, United States
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16
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Arisawa M, Tazawa T, Tanii S, Horiuchi K, Yamaguchi M. Rhodium-Catalyzed Synthesis of Unsymmetric Di(heteroaryl) Sulfides Using Heteroaryl Ethers and S-Heteroaryl Thioesters via Heteroarylthio Exchange. J Org Chem 2016; 82:804-810. [DOI: 10.1021/acs.joc.6b02585] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mieko Arisawa
- Department of Organic Chemistry,
Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Takeru Tazawa
- Department of Organic Chemistry,
Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Saori Tanii
- Department of Organic Chemistry,
Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Kiyofumi Horiuchi
- Department of Organic Chemistry,
Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Masahiko Yamaguchi
- Department of Organic Chemistry,
Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
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17
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Zeolite Beta nanoparticles assembled Cu catalysts with superior catalytic performances in the synthesis of thioesters by cross-coupling of aldehydes and disulfides. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.07.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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18
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Forbes CR, Pandey AK, Ganguly HK, Yap GPA, Zondlo NJ. 4R- and 4S-iodophenyl hydroxyproline, 4R-pentynoyl hydroxyproline, and S-propargyl-4-thiolphenylalanine: conformationally biased and tunable amino acids for bioorthogonal reactions. Org Biomol Chem 2016; 14:2327-46. [PMID: 26806113 PMCID: PMC5824642 DOI: 10.1039/c5ob02473k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bioorthogonal reactions allow the introduction of new functionalities into peptides, proteins, and other biological molecules. The most readily accessible amino acids for bioorthogonal reactions have modest conformational preferences or bases for molecular interactions. Herein we describe the synthesis of 4 novel amino acids containing functional groups for bioorthogonal reactions. (2S,4R)- and (2S,4S)-iodophenyl ethers of hydroxyproline are capable of modification via rapid, specific Suzuki and Sonogashira reactions in water. The synthesis of these amino acids, as Boc-, Fmoc- and free amino acids, was achieved through succinct sequences. These amino acids exhibit well-defined conformational preferences, with the 4S-iodophenyl hydroxyproline crystallographically exhibiting β-turn (ϕ, ψ∼-80°, 0°) or relatively extended (ϕ, ψ∼-80°, +170°) conformations, while the 4R-diastereomer prefers a more compact conformation (ϕ∼-60°). The aryloxyproline diastereomers present the aryl groups in a highly divergent manner, suggesting their stereospecific use in molecular design, medicinal chemistry, and catalysis. Thus, the 4R- and 4S-iodophenyl hydroxyprolines can be differentially applied in distinct structural contexts. The pentynoate ester of 4R-hydroxyproline introduces an alkyne functional group within an amino acid that prefers compact conformations. The propargyl thioether of 4-thiolphenylalanine was synthesized via copper-mediated cross-coupling reaction of thioacetic acid with protected 4-iodophenylalanine, followed by thiolysis and alkylation. This amino acid combines an alkyne functional group with an aromatic amino acid and the ability to tune aromatic and side chain properties via sulfur oxidation. These amino acids provide novel loci for peptide functionalization, with greater control of conformation possible than with other amino acids containing these functional groups.
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Affiliation(s)
- Christina R. Forbes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Anil K. Pandey
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Himal K. Ganguly
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Neal J. Zondlo
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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19
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Yan K, Yang D, Wei W, Zhao J, Shuai Y, Tian L, Wang H. Catalyst-free direct decarboxylative coupling of α-keto acids with thiols: a facile access to thioesters. Org Biomol Chem 2015; 13:7323-30. [DOI: 10.1039/c5ob00769k] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A catalyst-free protocol has been demonstrated for the synthesis of thioesters via the direct decarboxylation of α-keto acids with thiols.
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Affiliation(s)
- Kelu Yan
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Daoshan Yang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Wei Wei
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Jing Zhao
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Yuanyuan Shuai
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Laijin Tian
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
| | - Hua Wang
- The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- P. R. China
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20
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Liu Y, Kim J, Seo H, Park S, Chae J. Copper(II)-Catalyzed Single-Step Synthesis of Aryl Thiols from Aryl Halides and 1,2-Ethanedithiol. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400941] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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21
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He C, Qian X, Sun P. Syntheses of thiol and selenol esters by oxidative coupling reaction of aldehydes with RYYR (Y = S, Se) under metal-free conditions. Org Biomol Chem 2014; 12:6072-5. [DOI: 10.1039/c4ob01159g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiol (selenol) esters were synthesized by a direct oxidative coupling reaction of aldehydes with disulfides (diselenides) under metal-free conditions.
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Affiliation(s)
- Chunhuan He
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210097, China
| | - Xuewei Qian
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210097, China
| | - Peipei Sun
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210097, China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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22
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Yu H, Zhang M, Li Y. Copper-Catalyzed Synthesis of Benzo[b]thiophenes and Benzothiazoles Using Thiocarboxylic Acids as a Coupling Partner. J Org Chem 2013; 78:8898-903. [DOI: 10.1021/jo401353w] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Hui Yu
- Department
of Chemistry, Tongji University, 1239 Siping Road, Yangpu, Shanghai 200092, PR China
| | - Meishu Zhang
- Department
of Chemistry, Tongji University, 1239 Siping Road, Yangpu, Shanghai 200092, PR China
| | - Yuzhe Li
- Department
of Chemistry, Tongji University, 1239 Siping Road, Yangpu, Shanghai 200092, PR China
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23
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Soria-Castro SM, Peñéñory AB. Efficient Cu-catalyzed base-free C-S coupling under conventional and microwave heating. A simple access to S-heterocycles and sulfides. Beilstein J Org Chem 2013; 9:467-75. [PMID: 23503063 PMCID: PMC3596051 DOI: 10.3762/bjoc.9.50] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 01/30/2013] [Indexed: 11/23/2022] Open
Abstract
S-aryl thioacetates can be prepared by reaction of inexpensive potassium thioacetate with both electron-rich and electron-poor aryl iodides under a base-free copper/ligand catalytic system. CuI as copper source affords S-aryl thioacetates in good to excellent yields, by using 1,10-phenanthroline as a ligand in toluene at 100 °C after 24 h. Under microwave irradiation the time was drastically reduced to 2 h. Both procedures are simple and involve a low-cost catalytic system. This methodology was also applied to the “one-pot” synthesis of target heterocycles, such as 3H-benzo[c][1,2]dithiol-3-one and 2-methylbenzothiazole, alkyl aryl sulfides, diaryl disulfides and asymmetric diaryl sulfides in good yields.
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Affiliation(s)
- Silvia M Soria-Castro
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA. Córdoba, Argentina
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24
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Liu M, Lin S, Ding J, Gao W, Wu H, Chen J. Decarboxylation of isatoic anhydrides with disulfides: an efficient and general synthesis of S-aryl 2-aminobenzothioate derivatives. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Linning P, Haussmann U, Beyer I, Weidlich S, Schieb H, Wiltfang J, Klafki HW, Knölker HJ. Optimisation of BACE1 inhibition of tripartite structures by modification of membrane anchors, spacers and pharmacophores - development of potential agents for the treatment of Alzheimer's disease. Org Biomol Chem 2013; 10:8216-35. [PMID: 22930158 DOI: 10.1039/c2ob26103k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Systematic variation of membrane anchor, spacer and pharmacophore building blocks leads to an optimisation of the inhibitory effect of tripartite structures towards BACE1-induced cleavage of the amyloid precursor protein (APP).
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26
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Zheng P, Lieberman BP, Ploessl K, Lemoine L, Miller S, Kung HF. A new single-photon emission computed tomography (SPECT) imaging agent for serotonin transporters: [(125)I]Flip-IDAM, (2-((2-((dimethylamino)methyl)-4-iodophenyl)thio)phenyl)methanol. Bioorg Med Chem Lett 2013; 23:869-72. [PMID: 23265880 DOI: 10.1016/j.bmcl.2012.11.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 11/07/2012] [Accepted: 11/12/2012] [Indexed: 11/18/2022]
Abstract
New ligands for in vivo brain imaging of serotonin transporter (SERT) with single photon emission tomography (SPECT) were prepared and evaluated. An efficient synthesis and radiolabeling of a biphenylthiol, FLIP-IDAM, 4, was accomplished. The affinity of FLIP-IDAM was evaluated by an in vitro inhibitory binding assay using [(125)I]-IDAM as radioligand in rat brain tissue homogenates (K(i) = 0.03 nM). New [(125)I]Flip-IDAM exhibited excellent binding affinity to SERT binding sites with a high hypothalamus to cerebellum ratio of 4 at 30 min post iv injection. The faster in vivo kinetics for brain uptake and a rapid washout from non-specific regions provide excellent signal to noise ratio. This new agent, when labeled with (123)I, may be a useful imaging agent for mapping SERT binding sites in the human brain.
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Affiliation(s)
- Pinguan Zheng
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
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27
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Forbes CR, Zondlo NJ. Synthesis of thiophenylalanine-containing peptides via Cu(I)-mediated cross-coupling. Org Lett 2012; 14:464-7. [PMID: 22224916 DOI: 10.1021/ol202947f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Aryl thiolates have unique reactive, redox, electronic, and spectroscopic properties. A practical approach to synthesize peptides containing thiophenylalanine has been developed via a novel Cu(I)-mediated cross-coupling reaction between thiolacetic acid and iodophenylalanine-containing peptides in the solid phase. This approach is compatible with all canonical proteinogenic functional groups, providing general access to aryl thiolates in peptides. Peptides containing thiophenylalanine (pK(a) 6.4) were readily elaborated to contain methyl, allyl, and nitrobenzyl thioethers, disulfides, sulfoxides, sulfones, or sulfonates.
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Affiliation(s)
- Christina R Forbes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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28
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Beletskaya IP, Ananikov VP. Transition-metal-catalyzed C-S, C-Se, and C-Te bond formation via cross-coupling and atom-economic addition reactions. Chem Rev 2011; 111:1596-636. [PMID: 21391564 DOI: 10.1021/cr100347k] [Citation(s) in RCA: 1250] [Impact Index Per Article: 96.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Irina P Beletskaya
- Lomonosov Moscow State University, Chemistry Department, Vorob'evy gory, Moscow 119899, Russia.
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29
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Park N, Park K, Jang M, Lee S. One-Pot Synthesis of Symmetrical and Unsymmetrical Aryl Sulfides by Pd-Catalyzed Couplings of Aryl Halides and Thioacetates. J Org Chem 2011; 76:4371-8. [DOI: 10.1021/jo2007253] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Namjin Park
- Department of Chemistry, Institute of Basic Science, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Kyungho Park
- Department of Chemistry, Institute of Basic Science, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Mihee Jang
- Department of Chemistry, Institute of Basic Science, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry, Institute of Basic Science, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Republic of Korea
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30
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Boateng CA, Zhu XY, Jacob MR, Khan SI, Walker LA, Ablordeppey SY. Optimization of 3-(phenylthio)quinolinium compounds against opportunistic fungal pathogens. Eur J Med Chem 2011; 46:1789-97. [PMID: 21402432 DOI: 10.1016/j.ejmech.2011.02.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2010] [Revised: 02/14/2011] [Accepted: 02/15/2011] [Indexed: 12/27/2022]
Abstract
Ring-opened benzothieno[3,2-b]quinolinium salts (3) were designed and synthesized with substitution on the thiophene moiety. In vitro screenings were carried out against fungal pathogens including Cryptococcus neoformans, Candida albicans, Candida glabrata, Candida krusei and Aspergillus fumigatus. In all, by replacing the N-methyl group (2) with N-ω-phenylpentyl or ω-cyclohexylpentyl group to form substituted 3-(phenylthio)quinolinium compounds produced remarkable potencies, as high as 300-fold (cf, cryptolepine (1)=250 μg/mL vs 11p=0.8 μg/mL for C. albicans) over the starting tetracyclic parent. In addition, all the N-ω-cyclohexylpentyl analogs produced superior activity against all the microorganisms tested than the N-ω-phenylpentyl substituted compounds. The potential of these compounds to induce toxicity in Vero cells was also investigated and the majority of them showed lower or no cytotoxicity at 10 μg/mL than amphotericin B, the gold standard in antifungal drug development. For instance, the trifluoromethyl substituted analogs (11n-p) have selectivity indices over 2-fold better than those of amphotericin B in C. neoformans. Overall, this ring-opened scafford of benzothienoquinolines, with substitution on the thiophenyl moiety, serves as a new lead for further development.
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Affiliation(s)
- Comfort A Boateng
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA
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31
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A general and mild two-step procedure for the synthesis of aryl and heteroaryl sulfonamides from the corresponding iodides. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.12.050] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Prasad DJC, Sekar G. Cu-Catalyzed One-Pot Synthesis of Unsymmetrical Diaryl Thioethers by Coupling of Aryl Halides Using a Thiol Precursor. Org Lett 2011; 13:1008-11. [PMID: 21271689 DOI: 10.1021/ol103041s] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. J. C. Prasad
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu-600 036, India
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu-600 036, India
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33
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Eichman CC, Stambuli JP. Transition metal catalyzed synthesis of aryl sulfides. Molecules 2011; 16:590-608. [PMID: 21242940 PMCID: PMC6259452 DOI: 10.3390/molecules16010590] [Citation(s) in RCA: 212] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 01/10/2011] [Accepted: 01/14/2011] [Indexed: 11/16/2022] Open
Abstract
The presence of aryl sulfides in biologically active compounds has resulted in the development of new methods to form carbon-sulfur bonds. The synthesis of aryl sulfides via metal catalysis has significantly increased in recent years. Historically, thiolates and sulfides have been thought to plague catalyst activity in the presence of transition metals. Indeed, strong coordination of thiolates and thioethers to transition metals can often hinder catalytic activity; however, various catalysts are able to withstand catalyst deactivation and form aryl carbon-sulfur bonds in high-yielding transformations. This review discusses the metal-catalyzed arylation of thiols and the use of disulfides as metal-thiolate precursors for the formation of C-S bonds.
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34
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van den Hoogenband A, Lange JH, Bronger RP, Stoit AR, Terpstra JW. A simple, base-free preparation of S-aryl thioacetates as surrogates for aryl thiols. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.125] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Duarte A, Cunico W, Pereira CMP, Flores AFC, Freitag RA, Siqueira GM. Ultrasound promoted synthesis of thioesters from 2-mercaptobenzoxa(thia)zoles. ULTRASONICS SONOCHEMISTRY 2010; 17:281-3. [PMID: 19740694 DOI: 10.1016/j.ultsonch.2009.08.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 08/04/2009] [Accepted: 08/12/2009] [Indexed: 05/14/2023]
Abstract
An ultrasound-enhanced method has been developed for the synthesis of a variety of thioesters from benzoyl chlorides and 2-mercaptobenzoxa(thia)zoles. Applying this methodology, 14 compounds were synthesized in excellent yields.
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Affiliation(s)
- Anaí Duarte
- Departamento de Química Orgânica, UFPel, Campus Universitário, Pelotas, RS, Brazil
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36
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Jiang Y, Qin Y, Xie S, Zhang X, Dong J, Ma D. A general and efficient approach to aryl thiols: CuI-catalyzed coupling of aryl iodides with sulfur and subsequent reduction. Org Lett 2010; 11:5250-3. [PMID: 19835369 DOI: 10.1021/ol902186d] [Citation(s) in RCA: 147] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A CuI-catalyzed coupling reaction of aryl iodides and sulfur powder takes place in the presence of K(2)CO(3) at 90 degrees C. The coupling mixture is directly treated with NaBH(4) or triphenylphosphine to afford aryl thiols in good to excellent yields. A wide range of substituted aryl thiols that bear methoxy, hydroxyl, carboxylate, amido, keto, bromo, and fluoro groups can be assembled through this procedure.
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Affiliation(s)
- Yongwen Jiang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
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37
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38
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Alvaro E, Hartwig JF. Resting state and elementary steps of the coupling of aryl halides with thiols catalyzed by alkylbisphosphine complexes of palladium. J Am Chem Soc 2009; 131:7858-68. [PMID: 19453106 DOI: 10.1021/ja901793w] [Citation(s) in RCA: 195] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Detailed mechanistic studies on the coupling of aryl halides with thiols catalyzed by palladium complexes of the alkylbisphosphine ligand CyPF-(t)Bu (1-dicyclohexylphosphino-2-di-tert-butylphosphinoethylferrocene) are reported. The elementary steps that constitute the catalytic cycle, i.e. oxidative addition, transmetalation and reductive elimination, have been studied, and their relative rates are reported. Each of the steps of the catalytic process occurs at temperatures that are much lower than those required for the reactions catalyzed by a combination of palladium precursors and CyPF-(t)Bu. To explain these differences in rates between the catalytic and stoichiometric reactions, studies were conducted to identify the resting state of the catalyst of the reactions catalyzed by a combination of Pd(OAc)(2) and CyPF-(t)Bu, a combination of Pd(dba)(2) and CyPF-(t)Bu, or the likely intermediate Pd(CyPF-(t)Bu)(Ar)(Br). These data show that the major palladium complex in each case lies off of the catalytic cycle. The resting state of the reactions catalyzed by Pd(OAc)(2) and CyPF-(t)Bu was the palladium bis-thiolate complex [Pd(CyPF-(t)Bu)(SR)(2)] (R = alkyl or aryl). The resting state in reactions catalyzed by Pd(2)(dba)(3) and CyPF-(t)Bu was the binuclear complex [Pd(CyPF-(t)Bu)](2)(mu(2),eta(2)-dba) (9). The resting states of reactions of both aromatic and aliphatic thiols catalyzed by [Pd(CyPF-(t)Bu)(p-tolyl)(Br)] (3a) were the hydridopalladium thiolate complexes [Pd(CyPF-(t)Bu)(H)(SR)] (R= alkyl and aryl). All these palladium species have been prepared independently, and the mechanisms by which they enter the catalytic cycle have been examined in detail. These features of the reaction catalyzed by palladium and CyPF-(t)Bu have been compared with those of reactions catalyzed by the alkylbisphosphine DiPPF and Pd(OAc)(2) or Pd(dba)(2). Our data indicate that the resting states of these reactions are similar to each other and that our mechanistic conclusions about reactions catalyzed by palladium and CyPF-(t)Bu can be extrapolated to reactions catalyzed by complexes of other electron-rich bisphosphines.
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Affiliation(s)
- Elsa Alvaro
- Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, Illinois 61801, USA
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39
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Ma D, Xie S, Xue P, Zhang X, Dong J, Jiang Y. Efficient and Economical Access to Substituted Benzothiazoles: Copper-Catalyzed Coupling of 2-Haloanilides with Metal Sulfides and Subsequent Condensation. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900486] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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40
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Ma D, Xie S, Xue P, Zhang X, Dong J, Jiang Y. Efficient and Economical Access to Substituted Benzothiazoles: Copper-Catalyzed Coupling of 2-Haloanilides with Metal Sulfides and Subsequent Condensation. Angew Chem Int Ed Engl 2009; 48:4222-5. [PMID: 19425042 DOI: 10.1002/anie.200900486] [Citation(s) in RCA: 223] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
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41
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Cao H, McNamee L, Alper H. Palladium-Catalyzed Thiocarbonylation of Iodoarenes with Thiols in Phosphonium Salt Ionic Liquids. J Org Chem 2008; 73:3530-4. [DOI: 10.1021/jo800287s] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Cao
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Laura McNamee
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Howard Alper
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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42
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Abstract
The carbon-sulfur bond formation of aryl bromides and triflates catalyzed by a new catalyst system, Pd2(dba)3/xantphos, has been demonstrated. Based on this finding, a novel and practical synthesis of benzothiazoles has been developed. This new methodology allows for the assembly of a wide range of benzothiazoles.
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Affiliation(s)
- Toshiaki Mase
- 1Process Research, Preclinical Development, Banyu Pharmaceutical Co., Ltd. Okubo 3, Tsukuba, Ibaraki 300-2611, Japan
| | - Takahiro Itoh
- 1Process Research, Preclinical Development, Banyu Pharmaceutical Co., Ltd. Okubo 3, Tsukuba, Ibaraki 300-2611, Japan
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