1
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Cao M, Zuo D, Wang D, Li Y, Zhao J, Tan J, Li P. Palladium-Catalyzed Iodine Assisted Carbonylation of Indoles with ClCF 2CO 2Na and Alcohols. J Org Chem 2024; 89:5871-5877. [PMID: 38595315 DOI: 10.1021/acs.joc.4c00110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
A palladium-catalyzed iodine-assisted carbonylation reaction of indoles with readily available ClCF2CO2Na and alcohols has been developed. This protocol provides a practical and efficient approach to highly regioselective indole-3-carboxylates via a preiodination strategy of indoles. Different from classic carbonylation using toxic and difficult-to-handle carbon monoxide, this operationally simple and scalable reaction employed difluorocarbene as the carbonyl surrogate.
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Affiliation(s)
- Mengting Cao
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Dandan Zuo
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Dan Wang
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Yafei Li
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Jingjing Zhao
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Jiajing Tan
- Department of Organic Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Pan Li
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China
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2
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Soni S, Sahiba N, Teli S, Teli P, Agarwal LK, Agarwal S. Advances in the synthetic strategies of benzoxazoles using 2-aminophenol as a precursor: an up-to-date review. RSC Adv 2023; 13:24093-24111. [PMID: 37577091 PMCID: PMC10416314 DOI: 10.1039/d3ra03871h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023] Open
Abstract
Benzoxazole is a resourceful and important member of the heteroarenes that connects synthetic organic chemistry to medicinal, pharmaceutical, and industrial areas. It is a bicyclic planar molecule and is the most favorable moiety for researchers because it has been extensively used as a starting material for different mechanistic approaches in drug discovery. The motif exhibits a high possibility of broad substrate scope and functionalization to offer several biological activities like anti-microbial, anti-fungal, anti-cancer, anti-oxidant, anti-inflammatory effects, and so on. There has been a large upsurge in the synthesis of benzoxazole via different pathways. The present article presents recent advances in synthetic strategies for benzoxazole derivatives since 2018. A variety of well-organized synthetic methodologies for benzoxazole using 2-aminophenol with aldehydes, ketones, acids, alcohols, isothiocyanates, ortho-esters, and alkynones under different reaction conditions and catalysts, viz. nanocatalysts, metal catalysts, and ionic liquid catalysts, with other miscellaneous techniques has been summarized.
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Affiliation(s)
- Shivani Soni
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Nusrat Sahiba
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Sunita Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Pankaj Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Lokesh Kumar Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
| | - Shikha Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur-313001 Rajasthan India
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3
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Zuo D, Zhang T, Zhao J, Luo W, Wang C, Li P. Palladium-Catalyzed Regioselective [5 + 1] Annulation of Vinyl Aziridines/Epoxides with ClCF 2COONa. Org Lett 2022; 24:4630-4634. [PMID: 35731896 DOI: 10.1021/acs.orglett.2c01739] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Palladium-catalyzed regioselective [5 + 1] annulation reactions of vinyl aziridines/epoxides with ClCF2COONa have been developed. Significantly, vinyl aziridines/epoxides act as heteroatom-containing five-atom synthons, and commercially available and cheap ClCF2COONa acts as the source of carbonyl serving as a difluorocarbene precursor. This protocol provides an efficient and practical method for the synthesis of δ-lactams and δ-lactones in good yields.
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Affiliation(s)
- Dandan Zuo
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Tao Zhang
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Jingjing Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China.,College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Wen Luo
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Chaojie Wang
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Pan Li
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China.,College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
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4
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Duan J, Choy PY, Gan KB, Kwong FY. N-Difluoromethylation of N-pyridyl-substituted anilines with ethyl bromodifluoroacetate. Org Biomol Chem 2022; 20:1883-1887. [PMID: 35171189 DOI: 10.1039/d2ob00119e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general protocol for N-difluoromethylation of aniline derivatives is developed. Commercially available ethyl bromodifluoroacetate serves as a difluorocarbene source in the presence of a base. This carbene surrogate is attractive owing to its favorable stability, environmental friendliness and inexpensiveness. This reaction system features notable operational simplicity (bench top-grade solvents can be used without any pre-drying and do not require inert atmosphere protection). A wide range of functional groups in aniline derivatives are well-tolerated, and good-to-excellent product yields are generally obtained.
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Affiliation(s)
- Jindian Duan
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China.,College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Pui Ying Choy
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P.R. China.
| | - Kin Boon Gan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P.R. China.
| | - Fuk Yee Kwong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P.R. China.,Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P.R. China.
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5
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Ge D, Chu XQ. Multiple-fold C–F bond functionalization for the synthesis of (hetero)cyclic compounds: fluorine as a detachable chemical handle. Org Chem Front 2022. [DOI: 10.1039/d1qo01749g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We highlighted the recent advances in the field of multiple-fold C–F bond functionalization for the synthesis of (hetero)cyclic compounds.
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Affiliation(s)
- Danhua Ge
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xue-Qiang Chu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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6
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Abstract
Isothiocyanates (ITCs) are biologically active molecules found in several natural products and pharmaceutical ingredients. Moreover, due to their high and versatile reactivity, they are widely used as intermediates in organic synthesis. This review considers the best practices for the synthesis of ITCs using elemental sulfur, highlighting recent developments. First, we summarize the in situ generation of thiocarbonyl surrogates followed by their transformation in the presence of primary amines leading to ITCs. Second, carbenes and amines afford isocyanides, and the further reaction of this species with sulfur readily generates ITCs under thermal, catalytic or basic conditions. Additionally, we also reveal that in the catalyst-free reaction of isocyanides and sulfur, two—until this time overlooked and not investigated—different mechanistic pathways exist.
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7
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Zhang P, Yang L, Chen W, Liu M, Wu H. Synthesis of [1,4]Thiazino[4,3- a]indol-10-one Derivatives through Radical Anti Aza-Michael Addition of 2'-Aminochalcones. Org Lett 2021; 23:6094-6098. [PMID: 34255527 DOI: 10.1021/acs.orglett.1c02160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method for the synthesis of [1,4]thiazino[4,3-a]indole derivatives using sodium chlorodifluoroacetate (ClCF2CO2Na) and elemental sulfur as the difluoromethylthiolating reagent system has been developed. Three-component reactions of 2'-aminochalcones, sulfur, and ClCF2CO2Na under basic conditions using TEMPO as the oxidant afforded [1,4]thiazino[4,3-a]indol-10-ones containing a difluoromethyl thioether moiety in good yields. Four bonds including one C-N, two C-S, and one C-C bonds are selectively formed in the sequential transformation process.
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Affiliation(s)
- Pingshun Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Linjie Yang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Wanzhi Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Miaochang Liu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China
| | - Huayue Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, China
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8
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Li Y, Sun N, Zhang C, Hao M. Base‐Promoted
Formylation and
N
‐Difluoromethylation
of Azaindoles with Ethyl Bromodifluoroacetate as a Carbon Source. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yang Li
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Ning Sun
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Cai‐Lin Zhang
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Meng Hao
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
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9
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Liu X, Sheng H, Zhou Y, Song Q. Pd-Catalyzed Assembly of Fluoren-9-ones by Merging of C–H Activation and Difluorocarbene Transfer. Org Lett 2021; 23:2543-2547. [DOI: 10.1021/acs.orglett.1c00467] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaobing Liu
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
| | - Heyun Sheng
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, Hubei, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen 361021, Fujian, P. R. China
- Fujian University Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, Fujian, P. R. China
- State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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10
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Sap JBI, Meyer CF, Straathof NJW, Iwumene N, am Ende CW, Trabanco AA, Gouverneur V. Late-stage difluoromethylation: concepts, developments and perspective. Chem Soc Rev 2021; 50:8214-8247. [DOI: 10.1039/d1cs00360g] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review describes the conceptual advances that have led to the multiple difluoromethylation processes making use of well-defined CF2H sources.
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Affiliation(s)
- Jeroen B. I. Sap
- Chemistry Research Laboratory
- Department of Chemistry
- Oxford University
- OX1 3TA Oxford
- UK
| | - Claudio F. Meyer
- Chemistry Research Laboratory
- Department of Chemistry
- Oxford University
- OX1 3TA Oxford
- UK
| | - Natan J. W. Straathof
- Chemistry Research Laboratory
- Department of Chemistry
- Oxford University
- OX1 3TA Oxford
- UK
| | - Ndidi Iwumene
- Chemistry Research Laboratory
- Department of Chemistry
- Oxford University
- OX1 3TA Oxford
- UK
| | - Christopher W. am Ende
- Pfizer Inc
- Medicine Design, Eastern Point Road, Groton, Connecticut 06340, and 1 Portland Street
- Cambridge
- USA
| | | | - Véronique Gouverneur
- Chemistry Research Laboratory
- Department of Chemistry
- Oxford University
- OX1 3TA Oxford
- UK
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11
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Ma X, Song Q. Recent progress on selective deconstructive modes of halodifluoromethyl and trifluoromethyl-containing reagents. Chem Soc Rev 2020; 49:9197-9219. [PMID: 33146196 DOI: 10.1039/d0cs00604a] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Halodifluoromethyl and trifluoromethyl-containing compounds are widely employed in organic chemistry, pharmaceuticals and materials science. Therefore, their applications and transformations have received significant attention during the past few decades. The single, double, triple and quadruple cleavage of halodifluoromethyl compounds and various deconstructive modes of trifluoromethyl-containing compounds could generate a variety of synthons to prepare more valuable products. Herein, we summarize the most significant achievements in this field with an intriguing focus on results from the last decade.
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Affiliation(s)
- Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University Fuzhou, Fujian, 350108, China
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12
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Yue Y, Shao H, Wang Z, Wang K, Wang L, Zhuo K, Liu J. Elemental-Sulfur-Incorporated Cyclizations of Pyrrolidines Leading to Thienopyrroles. J Org Chem 2020; 85:11265-11279. [PMID: 32701277 DOI: 10.1021/acs.joc.0c01363] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report, herein, the synthesis of thieno[3,2-b]pyrroles from the direct oxidative [4 + 1] cyclization of 2-alkynyl pyrrolidines with elemental sulfur. This transformation likely originates from electrophilic attack at the β-position of pyrrolidine followed by an intramolecular thienannulation to deliver the desired product. Mechanistic investigation suggests that the present reaction involves the formation of dihydrothieno[3,2-b]pyrrole as an intermediate.
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Affiliation(s)
- Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Huibin Shao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Zhixian Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Ke Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Le Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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13
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Liu J, Wang Z, Wang K, Liu D, Yang Y, Fan J, Zhuo K, Yue Y. Elemental Sulfur‐Promoted [2+3+1] Annulation for Synthesis of Functionalized Thiochromeno[2,3‐
b
]indoles from Indole Derivatives. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Zhixian Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Ke Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Dong Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Yan Yang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Junjun Fan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
| | - Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 P. R. China
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14
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Wang J, Chen S, Wu W, Wen S, Weng Z. Base-Mediated Tunable Synthesis of 2-Trifluoromethylated Furans and Dihydrofuranols: Extraordinary Stable in Sulfuric Acid. J Org Chem 2019; 84:15685-15696. [PMID: 31696702 DOI: 10.1021/acs.joc.9b02326] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
2-Trifluoromethylated furans and dihydrofuranols were tunably synthesized from the cyclization of β-ketonitriles with 3-bromo-1,1,1-trifluoroacetone mediated by bases. In addition, dehydration of dihydrofuranol compounds with concentrated sulfuric acid gave another 2-(trifluoromethyl)furans isomer. The developed methodology exhibits an excellent functional group tolerance for both aromatic and aliphatic β-ketonitriles.
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Affiliation(s)
- Junwen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry , Fuzhou University , Fujian 350108 , China
| | - Shouxiong Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry , Fuzhou University , Fujian 350108 , China
| | - Wei Wu
- State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry , Fuzhou University , Fujian 350108 , China
| | - Shunli Wen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry , Fuzhou University , Fujian 350108 , China
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry , Fuzhou University , Fujian 350108 , China
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15
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Zhang P, Chen W, Liu M, Wu H. Synthesis of 3-HCF 2S-Chromones through Tandem Oxa-Michael Addition and Oxidative Difluoromethylthiolation. Org Lett 2019; 21:9326-9329. [PMID: 31769689 DOI: 10.1021/acs.orglett.9b03396] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple protocol for the synthesis of difluoromethylthiolated chromen-4-ones using elemental sulfur and ClCF2CO2Na as the difluoromethylthiolating agent is described. Three-component reactions of 2'-hydroxychalcones, ClCF2CO2Na, and sulfur under basic conditions using TEMPO as the oxidant afforded HCF2S-containing 4H-chromen-4-one and 9H-thieno[3,2-b]chromen-9-one derivatives in good yield. The protocol is practical and efficient, and the starting materials are cheap and readily available.
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Affiliation(s)
- Pingshun Zhang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Wanzhi Chen
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , China
| | - Miaochang Liu
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou 325027 , China
| | - Huayue Wu
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou 325027 , China
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16
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Yan Y, Cui C, Wang J, Li S, Tang L, Liu Y. Transition metal-free C-F/C-Cl/C-C cleavage of ClCF 2COONa for the synthesis of heterocycles. Org Biomol Chem 2019; 17:8071-8074. [PMID: 31464338 DOI: 10.1039/c9ob01641d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A transition metal-free and external oxidant-free annulation of substrates having two nitrogen-nucleophilic sites with ClCF2COONa was demonstrated, affording a series of 1,3,5-triazines and quinazolinones in up to 96% yields. Notably, ClCF2COONa was employed as the C1 synthon for valuable heterocycles. Using this protocol, two C-N bonds were formed in one pot via the cleavage of two C-F bonds, one C-Cl bond and one C-C bond. This method avoided the use of a transition metal and an oxidant and generated low toxicity inorganic waste.
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Affiliation(s)
- Yizhe Yan
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Chang Cui
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Jianyong Wang
- School of Light Industry and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, P. R. China
| | - Shaoqing Li
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
| | - Lin Tang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P. R. China
| | - Yanqi Liu
- School of Food and Biological Engineering, Henan Collaborative Innovation Center of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, 450000, P. R. China.
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17
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Liu J, Zhang Y, Yue Y, Wang Z, Shao H, Zhuo K, Lv Q, Zhang Z. Metal-Free Dehydrogenative Double C–H Sulfuration To Access Thieno[2,3-b]indoles Using Elemental Sulfur. J Org Chem 2019; 84:12946-12959. [DOI: 10.1021/acs.joc.9b01586] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Yanyan Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Zhixian Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Huibin Shao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Qingzhang Lv
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
| | - Zhiguo Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China
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18
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Zhen L, Fan H, Wang X, Jiang L. Synthesis of Thiocarbamoyl Fluorides and Isothiocyanates Using CF 3SiMe 3 and Elemental Sulfur or AgSCF 3 and KBr with Amines. Org Lett 2019; 21:2106-2110. [PMID: 30855147 DOI: 10.1021/acs.orglett.9b00383] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Reactions of thiocarbonyl fluoride derived from cheap, readily available, and widely used CF3SiMe3, elemental sulfur, and KF with secondary amines and primary amines at room temperature in THF provided a wide variety of thiocarbamoyl fluorides and isothiocyanates in moderate to excellent yields, respectively. The two reactions show broad substrate scope and good functional group tolerance. Moreover, AgSCF3 reacts with secondary/primary amines under KBr at room temperature, affording quantitative thiocarbamoyl fluorides/isothiocyanates, which feature late-stage application.
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Affiliation(s)
- Long Zhen
- School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Hui Fan
- School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Xiaoji Wang
- School of life Science , Jiangxi Science and Technology Normal University , Nanchang , 330013 , China
| | - Liqin Jiang
- School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
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19
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Li Z, Dong J, Wang J, Yang DY, Weng Z. Elemental sulfur-promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazoles and their derivatives. Chem Commun (Camb) 2019; 55:13132-13135. [DOI: 10.1039/c9cc06822h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An elemental sulfur promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazole derivatives from the reaction of o-aminophenols, thiols, and anilines with 2-bromo-3,3,3-trifluoropropene is reported.
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Affiliation(s)
- Zhengyu Li
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Jingnan Dong
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Junwen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Ding-Yah Yang
- Department of Chemistry
- Tunghai University
- Taichung City 40704
- Taiwan
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
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20
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Deng JC, Gao YC, Zhu Z, Xu L, Li ZD, Tang RY. Sulfite-Promoted Synthesis of N-Difluoromethylthioureas via the Reaction of Azoles with Bromodifluoroacetate and Elemental Sulfur. Org Lett 2018; 21:545-548. [DOI: 10.1021/acs.orglett.8b03876] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian-Chao Deng
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Yong-Chao Gao
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Zhu Zhu
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Li Xu
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Zhao-Dong Li
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Ri-Yuan Tang
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
- Key Laboratory of Natural Pesticide & Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
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