Intramolecular Aminoboration of Unfunctionalized Olefins
作者:Chun-Hua Yang、Yu-Shi Zhang、Wen-Wen Fan、Gong-Qing Liu、Yue-Ming Li
DOI:10.1002/anie.201505489
日期:2015.10.19
A direct and catalyst‐free method for the intramolecular aminoboration of unfunctionalizedolefins is reported. In the presence of BCl3 (1 equiv) as the sole boron source, intramolecular aminoboration of sulfonamide derivatives of 4‐penten‐1‐amines, 5‐hexen‐1‐amines, and 2‐allylanilines proceeded readily without the use of any catalyst. The boronic acids obtained after hydrolysis could be converted
For the first time, intramolecular allylic amination was conducted using rhodium(III) according to an "inner-sphere" type mechanism with amines activated by only one electron-withdrawing group. The activation of C(sp(3))-H bonds was chemoselective and allows the access to a variety of substituted cyclic amines such as pyrrolidines and piperidines.