Direct Synthesis of β-Amino Boronates via Amide α-C–H Bond Activation and C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Coupling under Dual Ni/Photoredox Catalysis
作者:Zihao Hu、Dong Wang、Tao XU
DOI:10.1021/acscatal.3c05467
日期:2024.1.5
β-amino boronates through the C(sp3)–C(sp3) coupling of amides and α-bromoboronates. The mild conditions allow for good functional group tolerance and a broad scope. The application of the method in the late-stage modification of complex molecules further demonstrates its great potential in organic synthesis. Mechanistic studies were also conducted, and a catalyticcycle is proposed.
Photochemical Radical C–H Halogenation of Benzyl N‐Methyliminodiacetyl (MIDA) Boronates: Synthesis of α‐Functionalized Alkyl Boronates
作者:Ling Yang、Dong‐Hang Tan、Wen‐Xin Fan、Xu‐Ge Liu、Jia‐Qiang Wu、Zhi‐Shu Huang、Qingjiang Li、Honggen Wang
DOI:10.1002/anie.202011872
日期:2021.2.15
α‐haloboronates are limiting and often suffer from harsh reaction conditions. Reported herein is a photochemical radical C‐H halogenation of benzyl N‐methyliminodiacetyl (MIDA) boronates. Fluorination, chlorination, and bromination reactions were effective by using this protocol. Upon reaction with different nucleophiles, the C−Br bond in the brominated product could be readily transformed to a series of C−C
Construction of α-Halogenated Boronic Esters via Visible Light-Induced C–H Bromination
作者:Feng-Chen Gao、Ming Li、Heng-Yu Gu、Xin-Yi Chen、Shuang Xu、Yi Wei、Kai Hong
DOI:10.1021/acs.joc.3c01915
日期:2023.10.6
α-Halogenated boronic esters are versatile building blocks that can be diversified into a wide variety of polyfunctionalized molecules. However, their synthetic potential has been hampered by limited preparation methods. Herein, we report a visible light-induced C–H brominationreaction of readily available benzyl boronic esters. This method features high yields, mild conditions, simple operation,