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Zheng Y, Jiang J, Li Y, Wei Y, Zhang J, Hu J, Ke Z, Xu X, Zhang L. Reactivities of α-Oxo BMIDA Gold Carbenes Generated by Gold-Catalyzed Oxidation of BMIDA-Terminated Alkynes. Angew Chem Int Ed Engl 2023; 62:e202218175. [PMID: 36806835 PMCID: PMC10079581 DOI: 10.1002/anie.202218175] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 02/22/2023]
Abstract
An oxidative strategy is reported to access α-oxo BMIDA gold carbenes directly from BMIDA-terminated alkynes. Besides offering expedient access to seldom studied boryl metal carbenes, these BMIDA gold carbene species undergo facile insertions into methyl, methylene, methine, and benzylic C-H bonds in the absence of the Thorpe-Ingold effect. They also undergo efficient OH insertion, cyclopropanation, and F-C alkylations. This chemistry provides rapid access to structurally diverse α-BMIDA ketones, which are scarcely documented. In combination with DFT studies, the role of BMIDA is established to be an electron-donating group that attenuates the high electrophilicity of the gold carbene center.
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Affiliation(s)
- Yang Zheng
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Jingxing Jiang
- School of Materials Science & Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Yue Li
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Yongliang Wei
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Junqi Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Jundie Hu
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Zhuofeng Ke
- School of Materials Science & Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Xinfang Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora‐Wagner–Meerwein Rearrangement. Access to β‐Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry Stockholm University Sweden
| | - Maria Biosca
- Department of Organic Chemistry Stockholm University Sweden
| | - Fahmi Himo
- Department of Organic Chemistry Stockholm University Sweden
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Wang Q, Biosca M, Himo F, Szabó KJ. Electrophilic Fluorination of Alkenes via Bora-Wagner-Meerwein Rearrangement. Access to β-Difluoroalkyl Boronates. Angew Chem Int Ed Engl 2021; 60:26327-26331. [PMID: 34613633 PMCID: PMC9299629 DOI: 10.1002/anie.202109461] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/06/2021] [Indexed: 01/26/2023]
Abstract
The electrophilic fluorination of geminal alkyl substituted vinyl‐Bmida derivatives proceeds via bora‐Wagner–Meerwein rearrangement. According to DFT modelling studies this rearrangement occurs with a low activation barrier via a bora‐cyclopropane shaped TS. The Bmida group has a larger migration aptitude than the alkyl moiety in the Wagner–Meerwein rearrangement of the presented electrophilic fluorination reactions.
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Affiliation(s)
- Qiang Wang
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Maria Biosca
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Stockholm University, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, Sweden
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