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Sikdar P, Choudhuri T, Paul S, Das S, Bagdi AK. K 2S 2O 8-Promoted Consecutive Tandem Cyclization/Oxidative Halogenation: Access to 3-Halo-Pyrazolo[1,5- a]pyrimidines. ACS OMEGA 2023; 8:23851-23859. [PMID: 37426282 PMCID: PMC10323951 DOI: 10.1021/acsomega.3c02270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/09/2023] [Indexed: 07/11/2023]
Abstract
A one-pot methodology has been developed to synthesize 3-halo-pyrazolo[1,5-a]pyrimidine derivatives through the three-component reaction of amino pyrazoles, enaminones (or chalcone), and sodium halides. The use of easily accessible 1,3-biselectrophilic reagents like enaminones and chalcone offers a straightforward approach for the synthesis of 3-halo-pyrazolo[1,5-a]pyrimidines. The reaction proceeded through a cyclocondensation reaction between amino pyrazoles with enaminones/chalcone in the presence of K2S2O8 followed by oxidative halogenations by NaX-K2S2O8. Mild and environmentally benign reaction conditions, wide functional group tolerance, and scalability of the reaction are the attractive facet of this protocol. The combination of NaX-K2S2O8 is also beneficial for the direct oxidative halogenations of pyrazolo[1,5-a]pyrimidines in water.
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Jiang DB, Wu FY, Cui HL. Recent progress in the oxidative bromination of arenes and heteroarenes. Org Biomol Chem 2023; 21:1571-1590. [PMID: 36723168 DOI: 10.1039/d3ob00019b] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Oxidative bromination has been serving as a powerful tool for the synthesis of bromo-containing molecules, as this bromination strategy features environmental friendliness, high flexibility in reaction system design and wide abundance of bromide sources and oxidants. The past decade has witnessed a large number of efficient oxidative bromination reaction systems and novel brominated aromatics. This review summarizes recent developments in the field of oxidative preparation of bromoarenes and bromoheteroarenes covering from 2012 to 2022.
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Affiliation(s)
- Da-Bo Jiang
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China. .,State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Fei-Yue Wu
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
| | - Hai-Lei Cui
- Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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Wen T, Liang B, Liang J, Wang D, Shi J, Xu S, Zhu W, Chen X, Zhu Z. Copper-Promoted N-Alkylation and Bromination of Arylamines/Indazoles Using Alkyl Bromides as Reagents for Difunctionalization. J Org Chem 2022; 87:12214-12224. [PMID: 36053202 DOI: 10.1021/acs.joc.2c01356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Practical copper-promoted N-alkylation and bromination of arylamines/indazoles with alkyl bromides are described; the N-alkylation-C-4-bromination and N-dialkylation-C-4-bromination of arylamines, and N-alkylation-C-3-bromination of indazoles, with alkyl bromides have been analyzed. The full use of alkyl bromides as alkylating and brominating building blocks without atom wastage, indicating excellent atom and step economy, has been highlighted. Eco-friendly oxygen and water are the reaction oxidant and byproduct, respectively.
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Affiliation(s)
- Tingting Wen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Baihui Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jiacheng Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Dongyi Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jianyi Shi
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Shengting Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Weidong Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
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Xie W, Wang M, Yang S, Chen Y, Feng J, Huang Y. C-H chlorination of (hetero)anilines via photo/organo co-catalysis. Org Biomol Chem 2022; 20:5319-5324. [PMID: 35730736 DOI: 10.1039/d2ob00834c] [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
Chlorinated (hetero)anilines are a class of important structural motifs that are widely present in synthetic building blocks and pharmaceuticals. Despite recent advancements, direct aniline chlorination still suffers from ortho/para and mono/poly chlorination selectivity problems. Herein, we disclose a photo-redox and organo co-catalyzed chlorination method for anilines. This method has great substrate generality and excellent mono-chlorination selectivity. Another merit of this method is the late-stage modification of drug molecules, which would be useful in medicinal chemistry.
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Affiliation(s)
- Wuchen Xie
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
| | - Meng Wang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
| | - Siyu Yang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
| | - Yadong Chen
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
| | - Jie Feng
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
| | - Yatian Huang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, No. 24 Tongjiaxiang Road, Nanjing, 210009, P. R. China.
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5
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Li X, Fan J, Cui D, Yan H, Shan S, Lu Y, Cheng X, Loh TP. Catalyst‐ and metal‐free photo‐oxidative coupling of thiols with BrCCl3. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaoman Li
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Jiali Fan
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Dezhi Cui
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Hui Yan
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Shiquan Shan
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Yongna Lu
- Nanjing Tech University Institute of Advanced Synthesis CHINA
| | - Xiamin Cheng
- Nanjing Tech University Institute of Advanced Synthesis 30 South Puzhu Road 211816 Nanjing CHINA
| | - Teck-peng Loh
- Nanyang Technological University Division of Chemistry and Biological Chemistry SINGAPORE
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6
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Jiang X, Jiang Y, Liu Q, Li B, Shi DQ, Zhao Y. Visible-Light-Induced para-Difluoroalkylation of Aniline Derivatives. J Org Chem 2022; 87:3546-3554. [PMID: 35170321 DOI: 10.1021/acs.joc.1c03095] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Visible-light-induced, iridium catalyzed, para-selective C-H difluoroalkylation of aniline derivatives under mild reaction conditions is reported. Various substrates and bioactive compounds, such as precursors of vorinostat and chlorpropham, were all well tolerated. This protocol features a wide substrate scope, high regioselectivity, low catalyst usage, and operational simplicity.
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Affiliation(s)
- Xipeng Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yaqiqi Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Qianqian Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Bao Li
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453000, PR China
| | - Da-Qing Shi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453000, PR China
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Zheng L, Zhuo X, Wang Y, Zou X, Zhong Y, Guo W. Photocatalytic cross-dehydrogenative coupling reaction toward the synthesis of N, N-disubstituted hydrazides and their bromides. Org Chem Front 2022. [DOI: 10.1039/d2qo00253a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient strategy for the divergent synthesis of N,N-disubstituted hydrazides and their bromides is reported through photoredox-catalytic cross-dehydrogenative coupling of N,N-disubstituted hydrazines and aldehydes.
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Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoya Zhuo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yihan Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoying Zou
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yumei Zhong
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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Chen JY, Li HX, Mu SY, Song HY, Wu ZL, Yang TB, Jiang J, He WM. Electrocatalytic three-component synthesis of 4-halopyrazoles with sodium halide as the halogen source. Org Biomol Chem 2022; 20:8501-8505. [DOI: 10.1039/d2ob01612e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The first example of the electrocatalytic multicomponent synthesis of 4-chloro/bromo/iodopyrazoles from hydrazines, acetylacetones and sodium halides under chemical oxidant- and external electrolyte-free conditions has been developed.
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Affiliation(s)
- Jin-Yang Chen
- Postdoctoral Mobile Station of Basic Medical Sciences, Hengyang Medical School, University of South China, Hengyang 421001, China
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Hong-Xia Li
- Postdoctoral Mobile Station of Basic Medical Sciences, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Si-Yu Mu
- Postdoctoral Mobile Station of Basic Medical Sciences, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Hai-Yang Song
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Zhi-Lin Wu
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Tian-Bao Yang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Jun Jiang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Wei-Min He
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
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Zhang T, Luo P, Lai C, Liu Z, Jin Y, Wang F. Catalyst-free Photochemical Bromination of Unprotected Aromatic Amino Acid Derivatives by Using a Rotating Ultraviolet Photoreactor. Chem Res Chin Univ 2021. [DOI: 10.1007/s40242-021-1413-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Visible-Light-Induced Catalytic Selective Halogenation with Photocatalyst. Molecules 2021; 26:molecules26237380. [PMID: 34885962 PMCID: PMC8659127 DOI: 10.3390/molecules26237380] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/29/2021] [Accepted: 12/02/2021] [Indexed: 12/02/2022] Open
Abstract
Halide moieties are essential structures of compounds in organic chemistry due to their popularity and wide applications in many fields such as natural compounds, agrochemicals, and pharmaceuticals. Thus, many methods have been developed to introduce halides into various organic molecules. Recently, visible-light-driven reactions have emerged as useful methods of organic synthesis. Particularly, halogenation strategies using visible light have significantly improved the reaction efficiency and reduced toxicity, as well as promoted reactions under mild conditions. In this review, we have summarized recent studies in visible-light-mediated halogenation (chlorination, bromination, and iodination) with photocatalysts.
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