Regioselective Nucleophilic Addition of Organometallic Reagents to 3-Geminal Bis(silyl) <i>N</i>-Acyl Pyridinium
作者:Ya Wu、Linjie Li、Hongze Li、Lu Gao、Hengmu Xie、Zhigao Zhang、Zhishan Su、Changwei Hu、Zhenlei Song
DOI:10.1021/ol500302r
日期:2014.4.4
bis(silyl) N-acyl pyridinium has been described. Geminal bis(silane) shows contrasting roles that lead to different regioselectivities for the addition of different nucleophiles: its steric effect dominates to favor 1,6-addition of alkyl, vinyl, and aryl organometallicreagents; its directing effect dominates to favor 1,2-addition of less sterically demanding alkynyl Grignard reagents.