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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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2
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Bao Z, Huang M, Xu Y, Zhang X, Wu YD, Wang J. Selective Formal Carbene Insertion into Carbon-Boron Bonds of Diboronates by N-Trisylhydrazones. Angew Chem Int Ed Engl 2023; 62:e202216356. [PMID: 36576426 DOI: 10.1002/anie.202216356] [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: 11/07/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 12/29/2022]
Abstract
Bisborylalkanes play important roles in organic synthesis as versatile bifunctional reagents. The two boron moieties in these compounds can be selectively converted into other functional groups through cross-coupling, oxidation or radical reactions. Thus, the development of efficient methods for synthesizing bisborylalkanes is highly demanded. Herein we report a new strategy to access bisborylalkanes through the reaction of N-trisylhydrazones with diboronate, in which the bis(boryl) methane is transformed into 1,2-bis(boronates) via formal carbene insertion. Since the N-trisylhydrazones can be readily derived from the corresponding aldehydes, this strategy represents a practical synthesis of 1,2-diboronates with broad substrate scope. Mechanistic studies reveal an unusual neighboring group effect of 1,1-bis(boronates), which accounts for the observed regioselectivity when unsymmetric 1,1-diboronates are applied.
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Affiliation(s)
- Zhicheng Bao
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
| | - Meirong Huang
- Shenzhen Bay Laboratory, Shenzhen, 518132, P. R. China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Yan Xu
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
| | - Xinhao Zhang
- Shenzhen Bay Laboratory, Shenzhen, 518132, P. R. China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Shenzhen, 518132, P. R. China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, P. R. China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, 100871, China
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Kurosawa MB, Kato K, Muto K, Yamaguchi J. Unified synthesis of multiply arylated alkanes by catalytic deoxygenative transformation of diarylketones. Chem Sci 2022; 13:10743-10751. [PMID: 36320688 PMCID: PMC9491083 DOI: 10.1039/d2sc03720c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 08/19/2022] [Indexed: 11/23/2022] Open
Abstract
A deoxygenative transformation of diarylketones leading to multiply arylated alkanes was developed. Diarylketones were reacted with diphenylphosphine oxide resulting in a phospha-Brook rearrangement, followed by palladium-catalyzed cross-couplings or a Friedel-Crafts type alkylation to afford the corresponding multiply arylated alkanes. A variety of diarylketones can be converted to multiply arylated alkanes such as diarylmethanes, tetraarylethanes, and triarylmethanes by reduction, dimerization, and arylation in one pot. Furthermore, a one-pot conversion from arylcarboxylic acids to diarylmethanes and tetraarylethanes, and a synthesis of tetraarylmethane and triphenylethane using sequential coupling reactions are also presented.
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Affiliation(s)
- Miki B Kurosawa
- Department of Applied Chemistry, Waseda University 513 Wasedatsurumakicho Shinjuku Tokyo 162-0041 Japan
| | - Kenta Kato
- Department of Applied Chemistry, Waseda University 513 Wasedatsurumakicho Shinjuku Tokyo 162-0041 Japan
| | - Kei Muto
- Waseda Institute for Advanced Study, Waseda University 513 Wasedatsurumakicho Shinjuku Tokyo 162-0041 Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University 513 Wasedatsurumakicho Shinjuku Tokyo 162-0041 Japan
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