作者:Kengo Inoue、Keiichi Hirano、Shota Fujioka、Masanobu Uchiyama、Atsunori Mori、Kentaro Okano
DOI:10.1021/acscatal.2c06082
日期:2023.3.17
brominated pyridines. Density functional theory calculations were consistent with the proposed mechanism, where the catalyst provided a bromine atom to the mono- or dibrominated substrate and the resulting debrominated catalyst then abstracted another bromine atom from the di- or tribrominated substrate, leading to the transposition of the bromo group on the substrate with catalyst regeneration.
报道了芳基三氟硼酸锂催化两个连续的溴-锂交换反应,称为“卤素舞”。在10 mol%的负载量下,该催化剂表现出高效的溴基转移活性,适用于各种溴代吡啶。密度泛函理论计算与所提出的机制一致,其中催化剂为单溴或二溴底物提供溴原子,然后所得脱溴催化剂从二溴或三溴底物中提取另一个溴原子,导致溴的转位用催化剂再生基团在底物上。