1
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Su Z, Tan B, Li Z, Huang H, Zhang Y. Palladium/Amine Dual-Catalyzed Tsuji-Trost Fluoroallylation of Aldehydes with gem-Difluorinated Cyclopropanes. Org Lett 2024; 26:5375-5379. [PMID: 38864753 DOI: 10.1021/acs.orglett.4c01882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
We herein disclose the Pd/amine dual-catalyzed ring-opening cross-coupling reaction between gem-difluorinated cyclopropanes (gem-F2CPs) with aldehydes, which enables the diversity-oriented synthesis (DOS) of 2-fluoroallylic aldehydes bearing all-carbon quaternary centers with features of broad scope and excellent functional group tolerance. The synthetic value of this Tsuji-Trost system was further demonstrated by late-stage functionalization of natural product-derived gem-F2CPs and the diverse synthesis of various fluoroallylic aldehyde derivatives, including alcohol, alkyne, alkene, and amine.
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Affiliation(s)
- Zheng Su
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Binhong Tan
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Zhaodong Li
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Huicai Huang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, 510006 Guangzhou, China
| | - Yue Zhang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, 510006 Guangzhou, China
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2
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Su Z, Tan B, He H, Chen K, Chen S, Lei H, Chen TG, Ni SF, Li Z. Enantioselective Tsuji-Trost α-Fluoroallylation of Amino Acid Esters with Gem-Difluorinated Cyclopropanes. Angew Chem Int Ed Engl 2024; 63:e202402038. [PMID: 38412055 DOI: 10.1002/anie.202402038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/22/2024] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
A novel enantioselective Tsuji-Trost-type cross coupling reaction between gem-difluorinated cyclopropanes and N-unprotected amino acid esters enabled by synergistic Pd/Ni/chiral aldehyde catalysis is presented herein. This transformation streamlined the diversity-oriented synthesis (DOS) of optically active α-quaternary α-amino acid esters bearing a linear 2-fluoroallylic motif, which served as an appealing platform for the construction of other valuable enantioenriched compounds. The key intermediates were confirmed by HRMS detection, while DFT calculations revealed that the excellent enantioselectivity was attributed to the stabilizing non-covalent interactions between the Pd(II)-π-fluoroallyl species and the Ni(II)-Schiff base complex.
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Affiliation(s)
- Zheng Su
- National Key Laboratory of Green Pesticide, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Binhong Tan
- National Key Laboratory of Green Pesticide, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Hui He
- Department of Chemistry, Shantou University, Shantou, 515063, Guangdong, China
| | - Kaifeng Chen
- National Key Laboratory of Green Pesticide, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Shixin Chen
- National Key Laboratory of Green Pesticide, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Hongtao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510641, China
| | - Tie-Gen Chen
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan Tsuihang New District, 528400, Guangdong, China
| | - Shao-Fei Ni
- Department of Chemistry, Shantou University, Shantou, 515063, Guangdong, China
| | - Zhaodong Li
- National Key Laboratory of Green Pesticide, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
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3
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Yang H, Zeng Y, Song X, Che L, Jiang ZT, Lu G, Xia Y. Rhodium-Catalyzed Enantio- and Regioselective Allylation of Indoles with gem-Difluorinated Cyclopropanes. Angew Chem Int Ed Engl 2024; 63:e202403602. [PMID: 38515395 DOI: 10.1002/anie.202403602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 03/23/2024]
Abstract
The use of gem-difluorinated cyclopropanes (gem-DFCPs) as fluoroallyl surrogates under transition-metal catalysis has drawn considerable attention recently but such reactions are restricted to producing achiral or racemic mono-fluoroalkenes. Herein, we report the first enantioselective allylation of indoles under rhodium catalysis with gem-DFCPs. This reaction shows exceptional branched regioselectivity towards rhodium catalysis with gem-DFCPs, which provides an efficient route to enantioenriched fluoroallylated indoles with wide substrate scope and good functional group tolerance.
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Affiliation(s)
- Hui Yang
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Xiangyu Song
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Lin Che
- Linyi University, School of Chemistry and Chemical Engineering, Linyi, 276000, China
| | - Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610041, China
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4
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Wu X, Song X, Xia Y. High-Valent Copper Catalysis Enables Regioselective Fluoroarylation of Gem-Difluorinated Cyclopropanes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401243. [PMID: 38460153 PMCID: PMC11095216 DOI: 10.1002/advs.202401243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 02/21/2024] [Indexed: 03/11/2024]
Abstract
Transition-metal (TM) catalyzed reaction of gem-difluorinated cyclopropanes (gem-DFCPs) has drawn much attention recently. The reaction generally occurs via the activation of the distal C─C bond in gem-DFCPs by a low-valent TM through oxidative addition, eventually producing mono-fluoro olefins as the coupling products. However, achieving regioselective activation of the proximal C─C bond in gem-DFCPs that overcomes the intrinsic reactivity via TM catalysis remains elusive. Here, a new reaction mode of gem-DFCPs enabled by high-valent copper catalysis, which allows exclusive activation of the congested proximal C─C bond is presented. The reaction that achieves fluoroarylation of gem-DFCPs uses NFSI (N-fluorobenzenesulfonimide) as electrophilic fluoro reagent and arenes as the C─H nucleophiles, enabling the synthesis of diverse CF3-containing scaffolds. It is proposed that a high-valent copper species plays an important role in the regioselective activation of the proximal C─C bond possibly via a σ-bond metathesis.
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Affiliation(s)
- Xiuli Wu
- West China School of Public Health and West China Fourth HospitalWest China‐PUMC C.C. Chen Institute of Healthand State Key Laboratory of BiotherapySichuan UniversityChengdu610041China
| | - Xiangyu Song
- West China School of Public Health and West China Fourth HospitalWest China‐PUMC C.C. Chen Institute of Healthand State Key Laboratory of BiotherapySichuan UniversityChengdu610041China
| | - Ying Xia
- West China School of Public Health and West China Fourth HospitalWest China‐PUMC C.C. Chen Institute of Healthand State Key Laboratory of BiotherapySichuan UniversityChengdu610041China
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5
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Zeng Y, Jiang ZT, Xia Y. Selectivity in Rh-catalysis with gem-difluorinated cyclopropanes. Chem Commun (Camb) 2024; 60:3764-3773. [PMID: 38501197 DOI: 10.1039/d4cc00793j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Small-ring chemistry is a fascinating field in organic chemistry. gem-Difluorinated cyclopropanes, a unique class of cyclopropanes, have garnered significant interest due to their intrinsic high reactivity. In this context, gem-difluorinated cyclopropanes have been extensively investigated as fluoroallylic synthons in Pd-catalyzed ring-opening/cross-coupling reactions for the synthesis of monofluoroalkenes with linear or branched selectivity. In contrast, Rh-catalysis has revealed diverse selectivity in the reaction of gem-difluorinated cyclopropanes, such as regioselectivity, enantioselectivity, and chemoselectivity. This feature article aims to summarize our efforts towards developing Rh-catalyzed reactions of gem-difluorinated cyclopropanes, briefly discussing the design, selectivity, reaction mechanisms and future research prospects.
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Affiliation(s)
- Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China.
| | - Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China.
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China.
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6
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Ahmed EAMA, Zhang H, Cao WG, Gong TJ. Palladium-Catalyzed Cross-Coupling of gem-Difluorocyclopropanes with gem-Diborylalkanes for the Synthesis of Boryl-Substituted Fluorinated Alkenes. Org Lett 2023; 25:9020-9024. [PMID: 38063840 DOI: 10.1021/acs.orglett.3c03626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
This study presents a novel method for the regioselective coupling of gem-difluorinated cyclopropanes with gem-diborylmethane, utilizing a Pd-catalyst system. This innovative approach enables the synthesis of 2-fluoroalkenyl monoboronate scaffolds with high Z-selectivity. The resulting products undergo further transformations, including oxidation, Suzuki cross-coupling, and trifluoroborylation, all of which are achieved with good yields. This work introduces a valuable synthetic pathway to access important fluorinated compounds for various applications in organic chemistry.
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Affiliation(s)
| | - Hongchen Zhang
- College of pharmacy, Wenzhou Medical University, Wenzhou 325035, China
| | - Wen-Gen Cao
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Tian-Jun Gong
- Hefei National Research Center for Physical Sciences at the Microscale, iChEM, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy University of Science and Technology of China, Hefei 230026, People's Republic of China
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7
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Liang YF, Bilal M, Tang LY, Wang TZ, Guan YQ, Cheng Z, Zhu M, Wei J, Jiao N. Carbon-Carbon Bond Cleavage for Late-Stage Functionalization. Chem Rev 2023; 123:12313-12370. [PMID: 37942891 DOI: 10.1021/acs.chemrev.3c00219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Late-stage functionalization (LSF) introduces functional group or structural modification at the final stage of the synthesis of natural products, drugs, and complex compounds. It is anticipated that late-stage functionalization would improve drug discovery's effectiveness and efficiency and hasten the creation of various chemical libraries. Consequently, late-stage functionalization of natural products is a productive technique to produce natural product derivatives, which significantly impacts chemical biology and drug development. Carbon-carbon bonds make up the fundamental framework of organic molecules. Compared with the carbon-carbon bond construction, the carbon-carbon bond activation can directly enable molecular editing (deletion, insertion, or modification of atoms or groups of atoms) and provide a more efficient and accurate synthetic strategy. However, the efficient and selective activation of unstrained carbon-carbon bonds is still one of the most challenging projects in organic synthesis. This review encompasses the strategies employed in recent years for carbon-carbon bond cleavage by explicitly focusing on their applicability in late-stage functionalization. This review expands the current discourse on carbon-carbon bond cleavage in late-stage functionalization reactions by providing a comprehensive overview of the selective cleavage of various types of carbon-carbon bonds. This includes C-C(sp), C-C(sp2), and C-C(sp3) single bonds; carbon-carbon double bonds; and carbon-carbon triple bonds, with a focus on catalysis by transition metals or organocatalysts. Additionally, specific topics, such as ring-opening processes involving carbon-carbon bond cleavage in three-, four-, five-, and six-membered rings, are discussed, and exemplar applications of these techniques are showcased in the context of complex bioactive molecules or drug discovery. This review aims to shed light on recent advancements in the field and propose potential avenues for future research in the realm of late-stage carbon-carbon bond functionalization.
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Affiliation(s)
- Yu-Feng Liang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Muhammad Bilal
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Le-Yu Tang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Tian-Zhang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yu-Qiu Guan
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Zengrui Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Minghui Zhu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Jialiang Wei
- Changping Laboratory, Yard 28, Science Park Road, Changping District, Beijing 102206, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
- Changping Laboratory, Yard 28, Science Park Road, Changping District, Beijing 102206, China
- State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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8
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Li D, Shen C, Si Z, Liu L. Palladium-Catalyzed Fluorinative Bifunctionalization of Aziridines and Azetidines with gem-Difluorocyclopropanes. Angew Chem Int Ed Engl 2023; 62:e202310283. [PMID: 37572320 DOI: 10.1002/anie.202310283] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/08/2023] [Accepted: 08/12/2023] [Indexed: 08/14/2023]
Abstract
An unprecedented Pd-catalyzed fluorinative bifunctionalization of aziridines and azetidines was successfully developed via regioselective C-C and C-F bond cleavage of gem-difluorocyclopropanes, leading to various β,β'-bisfluorinated amines and β,γ-bisfluorinated amines. This reaction was achieved by incorporating a 2-fluorinated allyl group and a fluorine atom scissored from gem-difluorocyclopropane in 100 % atom economy for the first time. The mechanistic investigations indicated that the reaction underwent amine attacking 2-fluorinated allyl palladium complex to generate η2 -coordinated N-allyl aziridine followed by fluoride ligand transfer affording the final β- and γ-fluorinated amines.
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Affiliation(s)
- Dongdong Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Chaoren Shen
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Zhiyao Si
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China
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9
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Zhang X, Huang X, Chen Y, Chen B, Ma Y. Synthesis of gem-Difluorinated 1,4-Dienes via Nickel-Catalyzed Three-Component Coupling of (Trifluoromethyl)alkenes, Alkynes, and Organoboronic Acids. Org Lett 2023; 25:1748-1753. [PMID: 36866931 DOI: 10.1021/acs.orglett.3c00444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Herein, a nickel-catalyzed defluorinative three-component coupling of trifluoromethyl alkenes, internal alkynes, and organoboronic acids is presented. The protocol provides a highly efficient and selective route for the synthesis of structurally diverse gem-difluorinated 1,4-dienes under mild conditions. Mechanistic studies suggest that C-F bond activation proceeds probably through the oxidative cyclization of trifluoromethyl alkenes with Ni(0) species, sequential addition to alkynes, and β-fluorine elimination.
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Affiliation(s)
- Xu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Institute of Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, P. R. China
| | - Xinmiao Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Institute of Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, P. R. China
| | - Yingzhuang Chen
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Institute of Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, P. R. China
| | - Bo Chen
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Institute of Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, P. R. China
| | - Yuanhong Ma
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), Key Laboratory of Phytochemistry R&D of Hunan Province, and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Institute of Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Hunan Normal University, 410081 Changsha, P. R. China
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10
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Zhao YR, Ma ZY, Liu L, Gao P, Duan XH, Hu M. Synthesis of α-Difluoromethylene Ethers via Photoredox-Induced Hyperconjugative Ring Opening of gem-Difluorocyclopropanes. J Org Chem 2023; 88:3787-3793. [PMID: 36827360 DOI: 10.1021/acs.joc.2c03062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
Fluorinated compounds have found widespread applications in pharmaceuticals, agrochemicals, and materials science. Precise construction of α-difluoromethylene ether (CF2-O) moiety in organic molecules is of high demand. Herein, a visible light-promoted reaction protocol for the synthesis of α-difluoromethylene ether from gem-difluorocyclopropane is described. The key ring-opening step is induced by hyperconjugative interaction of cyclopropane with photo-oxidized aromatic rings. This reaction is easy scale-up, and the products bearing a synthetic handle enable their further manipulation.
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Affiliation(s)
- Yu-Rou Zhao
- 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
| | - Zhi-Yong Ma
- 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
| | - Pin Gao
- 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
| | - 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.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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11
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Li Y, Zhang W, Yang S, Wang X, Liu Y, Ji D, Chen Q. Nickel‐Catalyzed Unsymmetrical Bis‐Allylation of Alkynes. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202300036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Affiliation(s)
- Ying Li
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Wei‐Song Zhang
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Sa‐Na Yang
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Xiao‐Yu Wang
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yan Liu
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Ding‐Wei Ji
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
| | - Qing‐An Chen
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
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12
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Li Y, Zhang WS, Yang SN, Wang XY, Liu Y, Ji DW, Chen QA. Nickel-Catalyzed Unsymmetrical Bis-Allylation of Alkynes. Angew Chem Int Ed Engl 2023; 62:e202300036. [PMID: 36826223 DOI: 10.1002/anie.202300036] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/24/2023] [Accepted: 02/24/2023] [Indexed: 02/25/2023]
Abstract
The catalytic bis-allylation of alkynes is an important but challenging protocol to construct all-carbon tetra-substituted alkenes. Particularly, the catalytic unsymmetrical bis-allylation of alkynes remains as an underexplored task to date. We herein report an unprecedented unsymmetrical bis-allylation by simultaneously utilizing electrophilic trifluoromethyl alkene and nucleophilic allylboronate as the allylic reagents. With the aid of robust Ni0 /NHC catalysis, valuable skipped trienes can be obtained in high regio- and stereo-selectivities under mild conditions. Mechanistic studies indicate that the reaction may proceed through a β-fluorine elimination of a nickelacycle followed by a transmetalation step with allylboronate. The present method exhibits a good tolerance of various functional groups. Besides, the skipped triene products can undergo an array of elaborate transformations, which highlights the potential applications of this strategy.
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Affiliation(s)
- Ying Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wei-Song Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Sa-Na Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiao-Yu Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yan Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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13
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Su ZM, Twilton J, Hoyt CB, Wang F, Stanley L, Mayes HB, Kang K, Weix DJ, Beckham GT, Stahl SS. Ni- and Ni/Pd-Catalyzed Reductive Coupling of Lignin-Derived Aromatics to Access Biobased Plasticizers. ACS CENTRAL SCIENCE 2023; 9:159-165. [PMID: 36844489 PMCID: PMC9951286 DOI: 10.1021/acscentsci.2c01324] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Indexed: 05/19/2023]
Abstract
Lignin-derived aromatic chemicals offer a compelling alternative to petrochemical feedstocks, and new applications are the focus of extensive interest. 4-Hydroxybenzoic acid (H), vanillic acid (G), and syringic acid (S) are readily obtained via oxidative depolymerization of hardwood lignin substrates. Here, we explore the use of these compounds to access biaryl dicarboxylate esters that represent biobased, less toxic alternatives to phthalate plasticizers. Chemical and electrochemical methods are developed for catalytic reductive coupling of sulfonate derivatives of H, G, and S to access all possible homo- and cross-coupling products. A conventional NiCl2/bipyridine catalyst is able to access the H-H and G-G products, but new catalysts are identified to afford the more challenging coupling products, including a NiCl2/bisphosphine catalyst for S-S and a NiCl2/phenanthroline/PdCl2/phosphine cocatalyst system for H-G, H-S, and G-S. High-throughput experimentation methods with a chemical reductant (Zn powder) are shown to provide an efficient screening platform for identification of new catalysts, while electrochemical methods can access improved yields and/or facilitate implementation on larger scale. Plasticizer tests are performed with poly(vinyl chloride), using esters of the 4,4'-biaryl dicarboxylate products. The H-G and G-G derivatives, in particular, exhibit performance advantages relative to an established petroleum-based phthalate ester plasticizer.
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Affiliation(s)
- Zhi-Ming Su
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jack Twilton
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Caroline B. Hoyt
- Renewable
Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Fei Wang
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Lisa Stanley
- Renewable
Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Heather B. Mayes
- Renewable
Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Kai Kang
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Daniel J. Weix
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Gregg T. Beckham
- Renewable
Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Shannon S. Stahl
- Department
of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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14
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Wang X, Patureau FW. Pd-catalyzed access to mono- and di-fluoroallylic amines from primary anilines. Chem Commun (Camb) 2023; 59:486-489. [PMID: 36530134 PMCID: PMC9814328 DOI: 10.1039/d2cc05844h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The Pd-catalyzed highly selective synthesis of mono- and di-2-fluoroallylic amines from gem-difluorocyclopropanes and ubiquitous unprotected primary anilines is herein described. Initial kinetic investigations suggest a first order in the gem-difluorocyclopropane substrate, as well as a circa zeroth order in the aniline coupling partner. The newly produced fluoroallylic motifs should find important applications in synthetic as well as medicinal chemistry and stimulate the further development of coupling methods based on strained cyclic building blocks.
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Affiliation(s)
- Xingben Wang
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1Aachen 52074Germanyhttps://www.patureau-oc-rwth-aachen.de
| | - Frederic W. Patureau
- Institute of Organic Chemistry, RWTH Aachen UniversityLandoltweg 1Aachen 52074Germanyhttps://www.patureau-oc-rwth-aachen.de
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15
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Duan A, Xiao F, Lan Y, Niu L. Mechanistic views and computational studies on transition-metal-catalyzed reductive coupling reactions. Chem Soc Rev 2022; 51:9986-10015. [PMID: 36374254 DOI: 10.1039/d2cs00371f] [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
Transition-metal-catalyzed reductive coupling reactions have been considered as a powerful tool to convert two electrophiles into value-added products. Numerous related reports have shown the fascinating potential. Mechanistic studies, especially theoretical studies, can provide important implications for the design of novel reductive coupling reactions. In this review, we summarize the representative advancements in theoretical studies on transition-metal-catalyzed reductive coupling reactions and systematically elaborate the mechanisms for the key steps of reductive coupling reactions. The activation modes of electrophiles and the deep insights of selectivity generation are mechanistically discussed. In addition, the mechanism of the reduction of high-oxidation-state catalysts and further construction of new chemical bonds are also described in detail.
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Affiliation(s)
- Abing Duan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
| | - Fengjiao Xiao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
| | - Yu Lan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, China. .,School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Linbin Niu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, China.
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16
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Qiao X, Lin Y, Huang D, Ji H, Chen C, Ma W, Zhao J. Photocatalytic Oxo-Amination of Aryl Cyclopropanes through an Unusual S N2-Like Ring-Opening Pathway: Won >99% ee. J Org Chem 2022; 87:13627-13642. [PMID: 36174109 DOI: 10.1021/acs.joc.2c01291] [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
One-pot oxo-amination of unactivated cyclopropanes with safe, green dioxygen as an oxidant and low-cost amines as nitrogen sources has generated interest since this can directly result in uniform β-located difunctional units. Formation of the three-electron cation radical followed by the nucleophilic attack of amines to open the strained ring of cyclopropanes catalyzed by classic noble-complex photocatalysts was a promising strategy. However, this ring-opening pathway could not maintain the entire second-order nucleophilic substitution (SN2) conversion, which generally led to unsatisfactory enantioselectivity (enantiomeric excess (ee) value ∼60%). Here, we demonstrate that for such a one-step oxo-amination of cyclopropanes with benign dioxygen and pyrazoles, a highly uniform inversion of configuration could be first accomplished through a TiO2 photocatalyst. This strategy features low-cost, semiheterogeneous photocatalysis and environmentally friendly reaction conditions, without using any sacrificial reagent or additive. Importantly, our protocol not only provides a relatively broad substrate scope tolerant to a certain range of substituted cyclopropanes and pyrazoles, resulting in various β-amino ketone products (∼50 examples) with excellent conversions and yields, but also retains excellent enantioselectivity (ee value ∼99%). A concerted SN2 ring opening raised from an oxetane cation intermediate rather than a conventional three-electron cation radical prior to attaching to dioxygen was proposed.
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Affiliation(s)
- Xiaofeng Qiao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yuhan Lin
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Di Huang
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hongwei Ji
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wanhong Ma
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jincai Zhao
- Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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17
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Wu X, Zeng Y, Jiang ZT, Zhu Y, Xie L, Xia Y. Lewis Acid-Catalyzed Ring-Opening Cross-Coupling Reaction of gem-Difluorinated Cyclopropanes Enabled by C–F Bond Activation. Org Lett 2022; 24:8429-8434. [DOI: 10.1021/acs.orglett.2c03544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiuli Wu
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Yulei Zhu
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Linshen Xie
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health and State Key Laboratory of Biotherapy, Sichuan University, Chengdu, Sichuan 610041, China
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18
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Zeng Y, Yang H, Du J, Huang Q, Huang G, Xia Y. Rh-catalyzed regio-switchable cross-coupling of gem-difluorinated cyclopropanes with allylboronates to structurally diverse fluorinated dienes. Chem Sci 2022; 13:12419-12425. [PMID: 36382270 PMCID: PMC9629036 DOI: 10.1039/d2sc04118a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 10/04/2022] [Indexed: 09/23/2023] Open
Abstract
The control of linear/branched selectivity is one of the major focuses in transition-metal catalyzed allyl-allyl cross-coupling reactions, in which bond connection occurs at the terminal site of both the allyl fragments forming different types of 1,5-dienes. Herein, terminal/internal regioselectivity is investigated and found to be switchable in allyl-allyl cross-coupling reactions between gem-difluorinated cyclopropanes and allylboronates. The controlled terminal/internal regioselectivity arises from the fine-tuning of the rhodium catalytic system. Fluorinated 1,3-dienes, 1,4-dienes and 1,5-dienes are therefore produced in good yields with respectively isomerized terminal, internal, and terminal regioselectivity.
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Affiliation(s)
- Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Hui Yang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Jiayi Du
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
| | - Qin Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University Beijing 100084 China
| | - Guoliang Huang
- Department of Biomedical Engineering, School of Medicine, Tsinghua University Beijing 100084 China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University Chengdu 610041 China
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19
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Lv L, Qian H, Li Z. Catalytic Diversification of gem‐Difluorocyclopropanes: Recent Advances and Challenges. ChemCatChem 2022. [DOI: 10.1002/cctc.202200890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Leiyang Lv
- Renmin University of China Department of Chemistry CHINA
| | | | - Zhiping Li
- Renmin University of China Chemistry CHINA
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20
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Jiang ZT, Chen Z, Zeng Y, Shi JL, Xia Y. Enantioselective Formation of All-Carbon Quaternary Stereocenters in gem-Difluorinated Cyclopropanes via Rhodium-Catalyzed Stereoablative Kinetic Resolution. Org Lett 2022; 24:6176-6181. [PMID: 35951978 DOI: 10.1021/acs.orglett.2c02410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein, we report an effective method to offer chiral gem-difluorinated cyclopropanes containing an all-carbon quaternary stereocenter by rhodium-catalyzed stereoablative kinetic resolution. The activation of a sterically hindered all-carbon quaternary C-C bond through oxidative addition with a chiral rhodium complex is proposed as the enantiodetermining step. A wide range of gem-difluorinated cyclopropanes can be obtained with excellent ee values (ee = 87% to >99.9%), which are demonstrated to be useful chiral fluorine-containing building blocks by a series of postfunctionalizations.
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Affiliation(s)
- Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Zhengzhao Chen
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Jiang-Ling Shi
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
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21
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Xu WY, Li YJ, Gong TJ, Fu Y. Synthesis of gem-Difluorinated 1,3-Dienes via Synergistic Cu/Pd-Catalyzed Borodifluorovinylation of Alkynes. Org Lett 2022; 24:5884-5889. [PMID: 35926100 DOI: 10.1021/acs.orglett.2c01875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
gem-Difluoroalkenes (=CF2), which normally act as metabolically stable bioisosteres for carbonyl groups (C═O), are widely applied in agrochemicals and pharmaceuticals and are also used as building blocks in organic synthesis. Herein, an example of Cu/Pd-catalyzed borodifluorovinylation was achieved using alkynes, difluoroethylene bromide, and B2pin2 as chemical feedstocks, providing the corresponding conjugated gem-difluoroalkene scaffold with good functional group compatibility. Moreover, an array of fluorinated synthons can be obtained through further transformations.
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Affiliation(s)
- Wen-Yan Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Yu-Jie Li
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Tian-Jun Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Yao Fu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.,Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, People's Republic of China
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22
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Zhao S, Cai X, Lu Y, Hu J, Xiong Z, Jin J, Li Y, Wang H, Wu JQ. Cp*Ir(III) and Cp*Rh(III)-catalyzed annulation of salicylaldehydes with fluorinated vinyl tosylates. Chem Commun (Camb) 2022; 58:8966-8969. [PMID: 35861224 DOI: 10.1039/d2cc02194c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild, selective and redox-neutral Cp*Ir(III)- and Cp*Rh(III)-catalyzed C-H activation/annulation of salicylaldehydes with fluorovinyl tosylates is reported. The use of monofluorovinyl tosylate favors the synthesis of C2- and C3-substitution-free chromones via C-H activation/β-F elimination/annulation, whereas difluorovinyl tosylate leads to the construction of C2-fluoroalkoxy chromones. Mild reaction conditions and good functional-group tolerance were observed. Further functionalization of the resulting chromones via halogenation, alkynylation, alkylation and hydrocyanation was successfully realized.
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Affiliation(s)
- Shuwen Zhao
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Xiaojia Cai
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Yuying Lu
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Jinhui Hu
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Zhuang Xiong
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Jingwei Jin
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
| | - Yin Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Honggen Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
| | - Jia-Qiang Wu
- School of Biotechnology and Health Sciences, Wuyi University, 22 Dongchengcun, Jiangmen 529020, China.
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23
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Ai Y, Yang H, Duan C, Li X, Yu S. Cobalt-Catalyzed Fluoroallyllation of Carbonyls via C-C Activation of gem-Difluorocyclopropanes. Org Lett 2022; 24:5051-5055. [PMID: 35833731 DOI: 10.1021/acs.orglett.2c01821] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A new Co-catalyzed sequential C-C and C-F activation of gem-difluorinated cyclopropanes (gem-FCPs) to form nucleophilic fluoroallylcobalt, followed by addition to aldehydes, is reported. The protocol features the regioselective cleavage of dual chemical bonds of readily available gem-FCPs to prepare easily separable linear (Z)- and (E)-fluorinated homoallylic alcohols with a broad scope. This discovery established a new strategy for the efficient transformation of gem-FCPs as well as the synthesis of challenging fluorinated homoallylic alcohols.
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Affiliation(s)
- Yinan Ai
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Hanlin Yang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Chunying Duan
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Xingwei Li
- Institute of Molecular Science and Engineering, Institute of Frontier and Interdisciplinary Sciences, Shandong University, Qingdao, Shandong 266237, China.,School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an, Shaanxi 710062, China
| | - Songjie Yu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China.,Institute of Molecular Science and Engineering, Institute of Frontier and Interdisciplinary Sciences, Shandong University, Qingdao, Shandong 266237, China
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24
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Zeng Y, Gao H, Zhu Y, Jiang ZT, Lu G, Xia Y. Site-Divergent Alkenyl C–H Fluoroallylation of Olefins Enabled by Tunable Rhodium Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00540] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaxin Zeng
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Han Gao
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
| | - Yulei Zhu
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Zhong-Tao Jiang
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital, West China-PUMC C.C. Chen Institute of Health, and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
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25
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Chen W, Ni S, Wang Y, Pan Y. Electrochemical-Promoted Nickel-Catalyzed Reductive Allylation of Aryl Halides. Org Lett 2022; 24:3647-3651. [PMID: 35579336 DOI: 10.1021/acs.orglett.2c01247] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Compared with conventional reductive coupling, reductive coupling under electrochemical conditions without external reductants is greener, milder, and more efficient and is of increasing interest to organic chemists. In this work, we report the sacrificial anode, nickel-catalyzed electrochemical allylation reaction of aryl and alkyl halides. The reaction can be applied to a range of allylation reagents such as trifluoroalkenes, oxalates, and acetates.
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Affiliation(s)
- Wangzhe Chen
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shengyang Ni
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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26
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Yuan W, Li X, Qi Z, Li X. Palladium-Catalyzed Synthesis of Functionalized Indoles by Acylation/Allylation of 2-Alkynylanilines with Three-Membered Rings. Org Lett 2022; 24:2093-2098. [PMID: 35274957 DOI: 10.1021/acs.orglett.2c00246] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Palladium-catalyzed synthesis of 3-acyl and -allyl indoles has been realized by merging nucleophilic cyclization of ortho-alkynylanilines with ring opening of three-membered rings such as cyclopropenones and gem-difluorinated cyclopropanes. These functionalized indoles were obtained in moderate to high yields with high stereoselectivity in both cases. This protocol provides an alternative method toward functionalized indoles under mild and redox-neutral conditions.
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Affiliation(s)
- Weiliang Yuan
- School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Xiaojiao Li
- School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Zisong Qi
- School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an 710062, China
| | - Xingwei Li
- School of Chemistry and Chemical Engineering, Shaanxi Normal University (SNNU), Xi'an 710062, China
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27
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Jia J, Yuan F, Zhang Z, Song X, Hu F, Xia Y. Copper-Catalyzed Ring-Opening Defluoroborylation of gem-Difluorinated Cyclobutenes: A General Route to Bifunctional 1,3-Dienes and Their Applications. Org Lett 2022; 24:1985-1990. [PMID: 35238573 DOI: 10.1021/acs.orglett.2c00403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The exploration of the reactivity of gem-difluorinated small-size rings has continuously drawn attention in recent years but is limited to three-membered carbocycles. Herein we report a copper-catalyzed reaction of gem-fluorinated cyclobutenes with bis(pinacolato)diboron (B2pin2). A sequence of defluoroborylation and a ring-opening process produces B,F-bifunctional 1,3-dienes in a stereoselective manner. The transformation together with the efficient downstream coupling of the boronate and the fluoride moieties collectively constitutes a modular route to highly functionalized and stereocontrolled 1,3-dienes.
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Affiliation(s)
- Jie Jia
- West China School of Public Health and West China Fourth Hospital and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Fushan Yuan
- West China School of Public Health and West China Fourth Hospital and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Zihao Zhang
- West China School of Public Health and West China Fourth Hospital and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China.,School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China
| | - Xuejiao Song
- West China School of Public Health and West China Fourth Hospital and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Fangdong Hu
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China
| | - Ying Xia
- West China School of Public Health and West China Fourth Hospital and State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
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Xiong B, Li Y, Zhang J, Liu J, Zhang X, Lian Z. Cross‐Electrophile Coupling between Aryl/Vinyl Triflates and Vinyl Tosylates for the Synthesis of gem‐Difluoroalkenes via Ni/Pd Cooperative Catalysis. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Yue Li
- Sichuan University West China Hospital CHINA
| | - Jinyu Zhang
- Sichuan University West China Hospital CHINA
| | | | | | - Zhong Lian
- Sichuan University West China Hospital CHINA
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Lv L, Qian H, Ma Y, Huang S, Yan X, Li Z. Ligand-controlled regioselective and chemodivergent defluorinative functionalization of gem-difluorocyclopropanes with simple ketones. Chem Sci 2021; 12:15511-15518. [PMID: 35003579 PMCID: PMC8654029 DOI: 10.1039/d1sc05451a] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/07/2021] [Indexed: 12/14/2022] Open
Abstract
Modulating the reaction selectivity is highly attractive and pivotal to the rational design of synthetic regimes. The defluorinative functionalization of gem-difluorocyclopropanes constitutes a promising route to construct β-vinyl fluorine scaffolds, whereas chemo- and regioselective access to α-substitution patterns remains a formidable challenge. Presented herein is a robust Pd/NHC ligand synergistic strategy that could enable the C-F bond functionalization with exclusive α-regioselectivity with simple ketones. The key design adopted enolates as π-conjugated ambident nucleophiles that undergo inner-sphere 3,3'-reductive elimination warranted by the sterically hindered-yet-flexible Pd-PEPPSI complex. The excellent branched mono-defluorinative alkylation was achieved with a sterically highly demanding IHept ligand, while subtly less bulky SIPr acted as a bifunctional ligand that not only facilitated α-selective C(sp3)-F cleavage, but also rendered the newly-formed C(sp2)-F bond as the linchpin for subsequent C-O bond formation. These examples represented an unprecedented ligand-controlled regioselective and chemodivergent approach to various mono-fluorinated terminal alkenes and/or furans from the same readily available starting materials.
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Affiliation(s)
- Leiyang Lv
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Huijun Qian
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Yangyang Ma
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Shiqing Huang
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Xiaoyu Yan
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Zhiping Li
- Department of Chemistry, Renmin University of China Beijing 100872 China
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