1
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Kim S, Lee S. Electrochemical synthesis of sulfinic and sulfonic esters from sulfonyl hydrazides. Org Biomol Chem 2024; 22:4436-4444. [PMID: 38742933 DOI: 10.1039/d4ob00215f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
An electrochemical synthetic method for the synthesis of sulfinic esters and sulfonic esters from sulfonyl hydrazides was developed. Alkyl sulfinic esters were synthesized by treating sulfonyl hydrazides with trialkyl orthoformate in a DMF solvent at a constant current of 5 mA and then optimizing the reaction conditions. Conversely, alkyl sulfonic esters were exclusively obtained when the reaction was conducted in alkyl alcohol solvents at a constant current of 15 mA. The various substituted arylsulfonyl hydrazides afforded moderate to good yields of the desired sulfinic esters and sulfonic esters. Mechanistic investigations revealed that sulfonyl radicals were formed through electrochemical oxidation and that they react with alkyl radicals or alkoxy radicals to generate the respective ester products.
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Affiliation(s)
- Suji Kim
- Department of Chemistry, Chonnam National University, Gwangju, 61186 Republic of Korea.
| | - Sunwoo Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186 Republic of Korea.
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2
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Tang D, Zhang W, Ji J, Jiang R, Wan Y, Ma W, Zhou P. Selected Electrosynthesis of 3-Aminopyrazoles from α,β-Alkynic Hydrazones and Secondary Amines. J Org Chem 2024; 89:6520-6526. [PMID: 38602497 DOI: 10.1021/acs.joc.3c02995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
An available and simple electromediated cyclization method for 3-amino-substituted pyrazoles by using α,β-alkynic hydrazone and secondary amine is described. The strategy utilizes KI as an electrolyte in an undivided cell with a constant current, generating the desired products in moderate-to-good yield. The method features selective amination at the 3-position of the pyrazole skeleton. The results indicate that α,β-alkynic hydrazones functionalized with aromatic groups and secondary amines functionalized with electron-rich groups were better tolerated in this transformation.
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Affiliation(s)
- Dong Tang
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
| | - Wei Zhang
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
| | - Jingwen Ji
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
| | - Rui Jiang
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
| | - Yaya Wan
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
| | - Wei Ma
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, P. R. China
| | - Pengjuan Zhou
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Science, Yinchuan 750004, P. R. China
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3
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Zhou Y, Jiang Q, Cheng Y, Hu M, Duan XH, Liu L. Photoredox-Catalyzed Acylchlorination of α-CF 3 Alkenes with Acyl Chloride and Application as Masked Access to β-CF 3-enones. Org Lett 2024; 26:2656-2661. [PMID: 38526445 DOI: 10.1021/acs.orglett.4c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
We disclose a photocatalytic strategy that simultaneously addresses the construction of trifluoromethylated quaternary carbon centers and the preparation of β-CF3-enones through radical difunctionalization of α-CF3 alkenes with acyl chlorides. This method is characterized by its broad functional group compatibility, high efficiency, and atom economy. The versatility of this transformation is poised to broaden the applications of α-CF3 alkenes, providing new pathways for the rapid assembly of structurally diverse fluorinated compounds.
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Affiliation(s)
- Youkang Zhou
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qi Jiang
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yangyang Cheng
- Key Laboratory for Tumor Precision Medicine of Shaanxi Province and Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an 710061, China
| | - Mingyou Hu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xin-Hua Duan
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Le Liu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
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4
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Liu S, Zhang L, Xu L, Gao P, Duan XH, Guo LN. Fe-Catalyzed Alkylazidation of α-Trifluoromethylalkenes: An Access to Quaternary Stereocenters Containing CF 3 and N 3 Groups. Org Lett 2023. [PMID: 36815835 DOI: 10.1021/acs.orglett.3c00439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
A concise Fe-catalyzed alkylazidation of α-trifluoromethylalkenes via a C-C bond cleavage/radical addition/azidation cascade is described. This protocol features a broad substrate scope, excellent functional group compatibility, and the ability to be performed on a gram scale, thus offering a practical and step-economic approach to the synthetically useful tertiary α-trifluoromethyl azides.
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Affiliation(s)
- Shuai Liu
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Lu Zhang
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xin-jiang Bingtuan, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Pin Gao
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Xin-Hua Duan
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Li Na Guo
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
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5
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Yang M, Jiang R, Mu Y, Hong Y, Wan Y, Hou J, Tang D. Electrochemical cycloaddition of hydrazones with cyanamide for the synthesis of substituted 5-amine-1,2,4-triazoles. Chem Commun (Camb) 2023; 59:2303-2306. [PMID: 36745484 DOI: 10.1039/d2cc06277a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
An eco-friendly and efficient electrochemical method for the synthesis of 5-amine-1,2,4-triazole derivatives has been developed by employing hydrazones or in situ generation of hydrazones with cyanamide using KI as the catalyst and electrolyte. This strategy could be smoothly conducted with simple reaction conditions at room temperature without the addition of a chemical oxidant in an undivided cell, and cyanamide has been proven to be of great value in electrosynthesis.
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Affiliation(s)
- Minghua Yang
- Department of Chemical and Material Engineering, Quzhou College of Technology, No. 18 Jiangyuan Road, Quzhou 324002, Zhejiang, China
| | - Rui Jiang
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
| | - Yangxiu Mu
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
| | - Yu Hong
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
| | - Yaya Wan
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
| | - Jing Hou
- Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
| | - Dong Tang
- Department of Chemical and Material Engineering, Quzhou College of Technology, No. 18 Jiangyuan Road, Quzhou 324002, Zhejiang, China.,Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and ForestryScience, Yinchuan, P. R. China.
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6
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Electrochemical synthesis of 5-trifluoroethyl dihydrobenzimidazo[2,1-a] isoquinolines from pendent unactivated alkenes via radical relay. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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7
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Zheng P, Liu C, Zeng Q, Zhang Y, Liu Y, He J, Deng Y, Cao S. Fe-catalyzed hydroxytrifluoromethylation of α-(trifluoromethyl)styrenes with CF 3SO 2Na: facile access to α,β-bistrifluoromethyl tertiary alcohols. Org Biomol Chem 2022; 20:9302-9306. [PMID: 36399128 DOI: 10.1039/d2ob02035a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A mild and practical Fe-catalyzed hydroxytrifluoromethylation of α-(trifluoromethyl)styrenes with CF3SO2Na in the presence of K2S2O8 and air was developed. The reaction proceeded efficiently at room temperature without β-fluoride elimination and afforded the corresponding α,β-bistrifluoromethyl tertiary alcohols in good to excellent yields.
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Affiliation(s)
- Pai Zheng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Chuan Liu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Qianding Zeng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Yi Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Ying Liu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Jingjing He
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Yupian Deng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China.
| | - Song Cao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai, 200237, China. .,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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8
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Qian BC, Zhu CZ, Shen GB. The Application of Sulfonyl Hydrazides in Electrosynthesis: A Review of Recent Studies. ACS OMEGA 2022; 7:39531-39561. [PMID: 36385900 PMCID: PMC9648049 DOI: 10.1021/acsomega.2c04205] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/13/2022] [Indexed: 05/25/2023]
Abstract
Sulfonyl hydrazides are viewed as alternatives to sulfinic acids and their salts or sulfonyl halides, which are broadly used in organic synthesis or work as active pharmaceutical substances. Generally, sulfonyl hydrazides are considered good building blocks and show powerful value in a diverse range of reactions to construct C-S bonds or C-C bonds, and even C-N bonds as sulfur, carbon, or nitrogen sources, respectively. As a profound synthetic tool, the electrosynthesis method was recently used to achieve efficient and green applications of sulfonyl hydrazides. Interestingly, many unique and novel electrochemical syntheses using sulfonyl hydrazides as radical precursors have been developed, including cascade reactions, functionalization of heterocycles, as well as a continuous flow method combining with electrochemical synthesis since 2017. Accordingly, it is necessary to specifically summarize the recent developments of electrosynthesis with only sulfonyl hydrazides as radical precursors to more deeply understand and better design novel electrochemical synthesis reactions. Herein, electrosynthesis research using sulfonyl hydrazides as radical precursors since 2017 is reviewed in detail based on the chemical structures of products and reaction mechanisms.
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9
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Zhang S, Xu G, Yan H, Wu Q, Meng J, Duan J, Guo K. Electrooxidative [3 + 2] annulation of amidines with alkenes for the synthesis of spiroimidazolines. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Coppola GA, Pillitteri S, Van der Eycken EV, You SL, Sharma UK. Multicomponent reactions and photo/electrochemistry join forces: atom economy meets energy efficiency. Chem Soc Rev 2022; 51:2313-2382. [PMID: 35244107 DOI: 10.1039/d1cs00510c] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Visible-light photoredox catalysis has been regarded as an extremely powerful tool in organic chemistry, bringing the spotlight back to radical processes. The versatility of photocatalyzed reactions has already been demonstrated to be effective in providing alternative routes for cross-coupling as well as multicomponent reactions. The photocatalyst allows the generation of high-energy intermediates through light irradiation rather than using highly reactive reagents or harsh reaction conditions. In a similar vein, organic electrochemistry has experienced a fruitful renaissance as a tool for generating reactive intermediates without the need for any catalyst. Such milder approaches pose the basis toward higher selectivity and broader applicability. In photocatalyzed and electrochemical multicomponent reactions, the generation of the radical species acts as a starter of the cascade of events. This allows for diverse reactivity and the use of reagents is usually not covered by classical methods. Owing to the availability of cheaper and more standardized photo- and electrochemical reactors, as well as easily scalable flow-setups, it is not surprising that these two fields have become areas of increased research interest. Keeping these in view, this review is aimed at providing an overview of the synthetic approaches in the design of MCRs involving photoredox catalysis and/or electrochemical activation as a crucial step with particular focus on the choice of the difunctionalized reagent.
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Affiliation(s)
- Guglielmo A Coppola
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
| | - Serena Pillitteri
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium. .,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China.
| | - Upendra K Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
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11
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Mou XQ, Ren LC, Zhang M, Wang M, Jin YF, Guan QX, Cai A, Zhang SM, Ren H, Zhang Y, Chen YZ. Complementary Copper-Catalyzed and Electrochemical Aminosulfonylation of O-Homoallyl Benzimidates and N-Alkenyl Amidines with Sodium Sulfinates. Org Lett 2022; 24:1405-1411. [PMID: 35138858 DOI: 10.1021/acs.orglett.2c00287] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A complementary copper-catalyzed and electrochemical aminosulfonylation of O-homoallyl benzimidates and N-alkenyl amidines with sodium sulfinates was developed. The terminal alkene substrate produced sulfone-containing 1,3-oxazines and tetrahydropyrimidines in the presence of Cu(OAc)2, Ag2CO3, and DPP, and under similar reaction conditions, sulfonylated tetrahydro-1,3-oxazepines were prepared from 1-aryl-substituted O-homoallyl benzimidates in moderate to good yields. For certain electron-rich 1,1-diaryl-substituted alkene substrates, the corresponding tetrahydro-1,3-oxazepines could also be obtained in similar or even higher yields via a green electrochemical technique.
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Affiliation(s)
- Xue-Qing Mou
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Liang-Chen Ren
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Mei Zhang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Min Wang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Yu-Fan Jin
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Qing-Xin Guan
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Ang Cai
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Shi-Min Zhang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
| | - Yun Zhang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
| | - Yong-Zheng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
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12
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Luo X, Wang S, Lei A. Electrochemical‐induced hydroxysulfonylation of α‐CF3 alkenes to access tertiary β‐hydroxysulfones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101393] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Chen SJ, Chen GS, Deng T, Li JH, He ZQ, Liu LS, Ren H, Liu YL. 1,2-Dicarbofunctionalization of Trifluoromethyl Alkenes with Pyridinium Salts via a Cycloaddition/Visible-Light-Enabled Fragmentation Cascade. Org Lett 2022; 24:702-707. [PMID: 34994204 DOI: 10.1021/acs.orglett.1c04148] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although trifluoromethyl alkenes have great synthetic potential, their 1,2-difunctionalization has been a challenge. In this Letter, we disclose the first 1,2-dicarbofunctionalization of trifluoromethyl alkenes with pyridinium salts via a cascade process involving a base-promoted [3 + 2] cycloaddition followed by a visible-light-mediated Norrish-type-II fragmentation. This protocol allows for the formation of pyridines bearing a trifluoromethyl-substituted quaternary center in moderate to excellent yields under mild conditions.
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Affiliation(s)
- Shu-Jie Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Guo-Shu Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Tao Deng
- Institute of Tropical Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
| | - Jia-Hui Li
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Zhi-Qing He
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Li-Shan Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
| | - Yun-Lin Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
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14
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Xia PJ, Liu F, Pan YM, Yang MP, Yang YY. Efficient access to β-amino acid ester/β-amino ketone derivatives via photocatalytic radical alkoxycabonylimidation/carbonylimidation of alkenes. Org Chem Front 2022. [DOI: 10.1039/d2qo00268j] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A photocatalytic protocol for the synthesis of β-amino acid ester and β-amino ketone derivatives is developed using simple and easy-to-synthesize oxime oxalate and oxime phenylglyoxylate as difunctionalization reagents.
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Affiliation(s)
- Peng-Ju Xia
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Fu Liu
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Ying-Ming Pan
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Meng-Ping Yang
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Yun-Yi Yang
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
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15
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Xia PJ, Liu F, Li SH, Xiao JA. Tunable photocatalytic oxysulfonylation and chlorosulfonylation of α-CF3 alkenes with sulfonyl chlorides. Org Chem Front 2022. [DOI: 10.1039/d1qo01686e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tunable photoredox-catalyzed chlorosulfonylation and oxysulfonylation of α-trifluoromethylstyrenes with sulfonyl chloride were facilely achieved by simply manipulating the photocatalyst and solvent.
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Affiliation(s)
- Peng-Ju Xia
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Fu Liu
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Shu-Hui Li
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Jun-An Xiao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, 530001, P. R. China
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16
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Gu Q, Wang X, Liu X, Wu G, Xie Y, Shao Y, Zhao Y, Zeng X. Electrochemical sulfonylation of enamides with sodium sulfinates to access β-amidovinyl sulfones. Org Biomol Chem 2021; 19:8295-8300. [PMID: 34519742 DOI: 10.1039/d1ob01485d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemical sulfonylation of enamides with sodium sulfinates was developed in an undivided cell in constant current mode, leading to the formation of β-amidovinyl sulfones in moderate to good yields. The catalyst-, electrolyte- and oxidant-free protocol features good functional group tolerance and employs electric current as a green oxidant. Mechanistic insights into the reaction indicate that the reaction may proceed via a radical mechanism.
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Affiliation(s)
- Qingyun Gu
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Xin Wang
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Xinyi Liu
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Guixia Wu
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Yushan Xie
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Yu Shao
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Yu Zhao
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
| | - Xiaobao Zeng
- School of Pharmacy, Nantong University, 19 Qixiu Road, Nantong, Jiangsu Province 226001, People's Republic of China.
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