1
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Yu X, Ma Z, Zhu W, Liu H, Zhang Z, Liu Y, Zhang M, Zhao J, Zhang P, Xia C. Tandem Reduction, Ammonolysis, Condensation, and Deamination Reaction for Synthesis of Benzothiadiazines and 1-(Phenylsulfonyl)-1 H-benzimidazoles. J Org Chem 2022; 87:14738-14752. [PMID: 36269195 DOI: 10.1021/acs.joc.2c02071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A novel route for a SnCl2-promoted tandem reduction, ammonolysis, condensation, and deamination reaction which uses nitrile and 2-nitro-N-phenylbenzenesulfonamide/N-(2-nitrophenyl)benzenesulfonamide to synthesize derivatives of benzothiadiazine/1-(phenylsulfonyl)-1H-benzimidazole has been developed. The method features convenient operation and good functional group tolerance. In addition, it employs unsensitive and inexpensive SnCl2/i-PrOH as the reaction reagent and provides a direct approach for the synthesis of pharmaceutically important targets.
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Affiliation(s)
- Xiao Yu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Zhihong Ma
- Biotalk Co., Ltd., Shanghai 200092, China
| | - Wenjing Zhu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Hongyan Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Zenghui Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Yi Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Mei Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Jinbo Zhao
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China
| | - Chengcai Xia
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China
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2
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Iqbal Z, Joshi A, De SR. Ceric Ammonium Nitrate (CAN) Promoted Highly Chemo‐ and Regioselective Ortho‐Nitration of Anilines Under Mild Conditions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zafar Iqbal
- NIT Uttarakhand: National Institute of Technology Uttarakhand Chemistry INDIA
| | - Asha Joshi
- NIT Uttarakhand: National Institute of Technology Uttarakhand Chemistry Srinagar GarhwalSrinagar 246174 Srinagar INDIA
| | - Saroj Ranjan De
- National Institute of Technology Uttarakhand Dept. of Chemistry Srinagar Garhwal 246174 Srinagar INDIA
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3
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Yu X, Zhu W, Liu H, Liu Y, Li H, Han J, Duan G, Bai Z, Zhang P, Xia C. Practical chemoselective aromatic substitution: the synthesis of N-(4-halo-2-nitrophenyl)benzenesulfonamide through the efficient nitration and halogenation of N-phenylbenzenesulfonamide. Org Biomol Chem 2022; 20:5444-5451. [PMID: 35770678 DOI: 10.1039/d2ob01028c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A novel route involving the metal-promoted tandem nitration and halogenation of N-phenylbenzenesulfonamide to synthesize N-(4-halo-2-nitrophenyl)benzenesulfonamide derivatives has been developed. The method shows highly practical chemoselective and functional group compatibility. In addition, it employs insensitive and inexpensive Cu(NO3)2·3H2O, Fe(NO3)3·9H2O, and NH4NO3 as the nitration reagents, and it provides a direct approach for the preparation of 4-halo-2-nitroaniline, which is a crucial intermediate for the synthesis of benzimidazoles and quinoxaline derivatives.
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Affiliation(s)
- Xiao Yu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Wenjing Zhu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Hongyan Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Yi Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Hongshuang Li
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Junfen Han
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Guiyun Duan
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Zhushuang Bai
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China
| | - Chengcai Xia
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an 271016, China.
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4
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Zheng YN, Zheng H, Li T, Wei WT. Recent Advances in Copper-Catalyzed C-N Bond Formation Involving N-Centered Radicals. CHEMSUSCHEM 2021; 14:5340-5358. [PMID: 34750973 DOI: 10.1002/cssc.202102243] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/09/2021] [Indexed: 06/13/2023]
Abstract
C-N bonds are pervasive throughout organic-based materials, natural products, pharmaceutical compounds, and agricultural chemicals. Considering the widespread importance of C-N bonds, the development of greener and more convenient ways to form C-N bonds, especially in late-stage synthesis, has become one of the hottest research goals in synthetic chemistry. Copper-catalyzed radical reactions involving N-centered radicals have emerged as a sustainable and promising approach to build C-N bonds. As a chemically popular and diverse radical species, N-centered radicals have been used for all kinds of reactions for C-N bond formation by taking advantage of their inherently incredible reactive flexibility. Copper is also the most abundant and economic catalyst with the most relevant activity for facilitating the synthesis of valuable compounds. Therefore, the aim of the present Review was to illustrate recent and significant advances in C-N bond formation methods and to understand the unique advantages of copper catalysis in the generation of N-centered radicals since 2016. To provide an ease of understanding for the readers, this Review was organized based on the types of nitrogen sources (amines, amides, sulfonamides, oximes, hydrazones, azides, and tert-butyl nitrite).
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Affiliation(s)
- Yan-Nan Zheng
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, P. R. China
| | - Hongxing Zheng
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong, 252059, P. R. China
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan, 473061, P. R. China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan, 473061, P. R. China
| | - Wen-Ting Wei
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, P. R. China
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5
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Seki M, Takahashi Y. Regioselective C-H Azidation of Anilines and Application to Synthesis of Key Intermediate for Pharmaceutical. J Org Chem 2021; 86:7842-7848. [PMID: 34038109 DOI: 10.1021/acs.joc.1c00734] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A catalytic system for regioselective C-H azidation of inactive anilines was developed. In the presence of CuSO4·5H2O, simultaneous addition of NaN3 and Na2S2O8 to aq. CH3CN solution of free anilines under weakly acidic conditions (pH 4.5) smoothly underwent C-H azidation to provide corresponding α-azidated products in high yields. Methyl α-azidoanthranilate obtained by this method was readily transformed via simple reduction followed by cyclization to methyl 2-ethoxybenzimidazol-7-carboxylate, a key intermediate for antihypertensive Candesartan Cilexetil.
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Affiliation(s)
- Masahiko Seki
- MA Group, Tokuyama Corporation 40, Wadai, Tsukuba, Ibaraki 300-4247, Japan
| | - Yusuke Takahashi
- MA Group, Tokuyama Corporation 40, Wadai, Tsukuba, Ibaraki 300-4247, Japan
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6
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Reddy Depa M, Potla S, Narkhede UC, Jadhav VD, Vidavalur S. Copper-mediated regioselective efficient direct ortho-nitration of anilide derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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7
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Gramage-Doria R. Steering Site-Selectivity in Transition Metal-Catalyzed C-H Bond Functionalization: the Challenge of Benzanilides. Chemistry 2020; 26:9688-9709. [PMID: 32237177 DOI: 10.1002/chem.202000672] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/18/2020] [Indexed: 12/31/2022]
Abstract
Selective C-H bond functionalization catalyzed by metal complexes have completely revolutionized the way in which chemical synthesis is conceived nowadays. Typically, the reactivity of a transition metal catalyst is the key to control the site-, regio- and/or stereo-selectivity of a C-H bond functionalization. Of particular interests are molecules that contain multiple C-H bonds prone to undergo C-H bond activations with very similar bond dissociation energies at different positions. This is the case of benzanilides, relevant chemical motifs that are found in many useful fine chemicals, in which two C-H sites are present in chemically different aromatic fragments. In the last years, it has been found that depending on the metal catalyst and the reaction conditions, the amide motif might behave as a directing group towards the metal-catalyzed C-H bond activation in the benzamide site or in the anilide site. The impact and the consequences of such subtle control of site-selectivity are herein reviewed with important applications in carbon-carbon and carbon-heteroatom bond forming processes. The mechanisms unraveling these unique transformations are discussed in order to provide a better understanding for future developments in the field of site-selective C-H bond functionalization with transition metal catalysts.
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8
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Huang S, Yang R, Wang J, Chang S, Gou X, Hua C, Zhao J. Synthesis and combustion catalytic activity of ferrocene‐based energetic compounds. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3994] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shiqi Huang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
| | - Rong Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
| | - Jiaodan Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
| | - Shuai Chang
- School of PhysicsNorthwest University Shaanxi China
| | - Xiaofeng Gou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
| | - Chengwen Hua
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
| | - Junlong Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of EducationCollege of Chemistry and Materials Science, Northwest University Shaanxi China
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9
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Dai E, Dong Y, Kong R, Liu G, Dong Y, Wu Q, Liang D, Ma Y. Transition-metal-free mono- or dinitration of protected anilines. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1752730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Enrui Dai
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
| | - Yongrui Dong
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
| | - Rui Kong
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
| | - Guangzhang Liu
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
| | - Ying Dong
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
| | - Qiong Wu
- Yunnan Engineering Technology Research Center for Plastic Films, Kunming, China
| | - Deqiang Liang
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
- Yunnan Engineering Technology Research Center for Plastic Films, Kunming, China
| | - Yinhai Ma
- School of Chemistry and Chemical Engineering, Kunming University, Kunming, China
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10
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A microwave-assisted approach to N-(2-nitrophenyl)benzenesulfonamides that enhanced peroxidase activity in response to excess cadmium. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Cu-catalyzed direct ortho-chlorination/-oxygenation of aryls: Switching of oxidant, control the diversity of products. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2018.11.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Karthik S, Muthuvel K, Gandhi T. Base-Promoted Amidation and Esterification of Imidazolium Salts via Acyl C–C bond Cleavage: Access to Aromatic Amides and Esters. J Org Chem 2018; 84:738-751. [DOI: 10.1021/acs.joc.8b02567] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shanmugam Karthik
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
| | - Karthick Muthuvel
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore, Tamil Nadu 632014, India
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13
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1425] [Impact Index Per Article: 237.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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14
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Vodnala N, Gujjarappa R, Hazra CK, Kaldhi D, Kabi AK, Beifuss U, Malakar CC. Copper‐Catalyzed Site‐Selective Oxidative C−C Bond Cleavage of Simple Ketones for the Synthesis of Anilides and Paracetamol. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801096] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Nagaraju Vodnala
- Department of ChemistryNational Institute of Technology Manipur, Langol Imphal – 795004, Manipur
| | - Raghuram Gujjarappa
- Department of ChemistryNational Institute of Technology Manipur, Langol Imphal – 795004, Manipur
| | - Chinmoy K. Hazra
- Department of ChemistryKorea Advanced Institute of Science & Technology (KAIST) Daejeon 305-701 South Korea
| | - Dhananjaya Kaldhi
- Department of ChemistryNational Institute of Technology Manipur, Langol Imphal – 795004, Manipur
| | - Arup. K. Kabi
- Department of ChemistryNational Institute of Technology Manipur, Langol Imphal – 795004, Manipur
| | - Uwe Beifuss
- Institut für ChemieUniversität Hohenheim Garbenstr. 30, D- 70599 Stuttgart Germany
| | - Chandi C. Malakar
- Department of ChemistryNational Institute of Technology Manipur, Langol Imphal – 795004, Manipur
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15
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Kianmehr E, Nasab SB. Silver-Catalyzed Chemo- and Regioselective Nitration of Anilides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800779] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ebrahim Kianmehr
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
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16
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Liao YY, Gao YC, Zheng W, Tang RY. Oxidative Radical Cyclization of N
-methyl-N
-arylpropiolamide to Isatins via Cleavage of the Carbon-carbon Triple Bond. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800592] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yan-Yan Liao
- Department of Applied Chemistry, College of Materials and Energy; South China Agricultural University; Guangzhou 510642 People's Republic of China E-mail
| | - Yong-Chao Gao
- Department of Applied Chemistry, College of Materials and Energy; South China Agricultural University; Guangzhou 510642 People's Republic of China E-mail
| | - Wenxu Zheng
- Department of Applied Chemistry, College of Materials and Energy; South China Agricultural University; Guangzhou 510642 People's Republic of China E-mail
| | - Ri-Yuan Tang
- Department of Applied Chemistry, College of Materials and Energy; South China Agricultural University; Guangzhou 510642 People's Republic of China E-mail
- Key Laboratory of Natural Pesticide & Chemical Biology, Ministry of Education; South China Agricultural University; Guangzhou 510642 People's Republic of China
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17
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Wang CM, Tang KX, Gao TH, Chen L, Sun LP. Cu(II)-Catalyzed Ortho-C–H Nitration of Aryl Ureas By C–H Functionalization. J Org Chem 2018; 83:8315-8321. [DOI: 10.1021/acs.joc.8b01016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Chun-Meng Wang
- Jiangsu Key Laboratory of Drug Design & Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Kai-Xiang Tang
- Jiangsu Key Laboratory of Drug Design & Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Tian-Hong Gao
- Jiangsu Key Laboratory of Drug Design & Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Lin Chen
- Jiangsu Key Laboratory of Drug Design & Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Li-Ping Sun
- Jiangsu Key Laboratory of Drug Design & Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China
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18
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Chen WT, Bao WH, Ying WW, Zhu WM, Liang H, Wei WT. Copper-Promoted Tandem Radical Reaction of 2-Oxindoles with Formamides: Facile Synthesis of Unsymmetrical Urea Derivatives. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800132] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Wei-Ting Chen
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
| | - Wen-Hui Bao
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
| | - Wei-Wei Ying
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
| | - Wen-Ming Zhu
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
| | - Hongze Liang
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
| | - Wen-Ting Wei
- School of Materials Science and Chemical Engineering; Ningbo University; Ningbo 315211 China
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19
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Daggupati RV, Malapaka C. Cu(i)-Catalyzed amidation/imidation of N-arylglycine ester derivatives via C–N coupling under mild conditions. Org Chem Front 2018. [DOI: 10.1039/c7qo00851a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A copper-catalyzed cross-dehydrogenative amidation/imidation of N-arylglycine ester derivatives with benzamides, aromatic heterocyclic amides (oxindole, isatins), acyclic and cyclic amides (lactams) and imides (phthalimide, succinimide) under aerobic conditions has been developed.
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20
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Vinayak B, Ravindrakumar PV, Ramana DV, Chandrasekharam M. Revisiting 1-chloro-1,2-benziodoxol-3-one: efficient ortho-chlorination of aryls under aqueous conditions. NEW J CHEM 2018. [DOI: 10.1039/c8nj00530c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The ortho-selective amide directing group assisted chlorination of aryls with the easily accessible 1-chloro-1,2-benziodoxol-3-one as oxidant as well as chlorinating reagent is reported in the absence of a radical initiator. The open air, aqueous conditions and recyclable reagent demonstrate the green principles involved in the reaction.
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Affiliation(s)
- Botla Vinayak
- I&PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | | | - Daggupati V. Ramana
- I&PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
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21
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Vinayak B, Ashok A, Chandrasekharam M. Copper-Catalyzed Chelation-Assistedortho-Nitration of 2-Aryls Using Pharmacophoric Benzothiazoles and Benzoxazoles as Directing Groups. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701187] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Botla Vinayak
- Inorganic & Physical Chemistry Division; CSIR, Indian Institute of Chemical Technology; Uppal Road, Tarnaka 500007 Hyderabad India
| | - Akudari Ashok
- Inorganic & Physical Chemistry Division; CSIR, Indian Institute of Chemical Technology; Uppal Road, Tarnaka 500007 Hyderabad India
| | - Malapaka Chandrasekharam
- Inorganic & Physical Chemistry Division; CSIR, Indian Institute of Chemical Technology; Uppal Road, Tarnaka 500007 Hyderabad India
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22
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Chang MY, Chen HY, Wang HS. Regiocontrolled Synthesis of α-Sulfonylmethyl o-Nitrostyrenes via ZnI 2-Mediated Sulfonylation and AgNO 2/Pd(PPh 3) 4-Promoted o-Nitration. J Org Chem 2017; 82:10601-10610. [PMID: 28926711 DOI: 10.1021/acs.joc.7b02311] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein the AgNO2/Pd(PPh3)4-promoted regiocontrolled o-nitration of α-sulfonylmethylstyrenes in MeNO2 with good yields. The o-nitration process provides a series of sulfonyl o-nitrostyrenes. Substituted α-sulfonylmethylstyrenes were synthesized from ZnI2-mediated sulfonylation of substituted α-methylstyrenes and sodium sulfinates (RSO2Na) in MeCN with good to excellent yields. The structures of the key products were confirmed by X-ray crystallography. A plausible mechanism has been proposed herein.
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Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Han-Yu Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Heui-Sin Wang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
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Vinayak B, NavyaSree P, Chandrasekharam M. Iron(iii)-catalyzed chelation assisted remote C–H bond oxygenation of 8-amidoquinolines. Org Biomol Chem 2017; 15:9200-9208. [DOI: 10.1039/c7ob02159c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a simple, efficient oxygenation of C–H bonds that are geometrically inaccessible in 8-amidoquinolines with inexpensive and nontoxic iron(iii) catalyst. The chelation assisted remote benzoxylation protocol tolerates a wide substrate scope and is operationally simple.
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Affiliation(s)
- Botla Vinayak
- I&PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Pilli NavyaSree
- I&PC Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
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