New Transformations from a 3-Silyloxy 2-Aza-1,3-diene: Consecutive Zr-Mediated Retro-Brook Rearrangement and Reactions with Electrophiles
作者:Vincent Gandon、Philippe Bertus、Jan Szymoniak
DOI:10.1016/s0040-4020(00)00310-0
日期:2000.6
deprotonation with n-BuLi on the organometallic intermediate, and trapping with electrophiles including alkyl and acyl halides and aldehydes. The electrophilic addition step occurred at a stabilized α-silyl carbanion center without affecting the near transition metal residue. In the case of aldehydes, the Peterson alkenation reaction took place on the transition metal complex in a highly stereoselective way
描述了一锅法将标题化合物转化为α-官能化(甲硅烷基化)和α,β-不饱和仲酰胺的方法。涉及以下步骤:Zr介导的逆布鲁克重排,在有机金属中间体上用n -BuLi选择性去质子化,并用包括烷基卤和酰基卤以及醛的亲电试剂进行捕获。亲电子加成步骤在稳定的α-甲硅烷基碳负离子中心发生,而不影响近过渡金属残基。在醛的情况下,彼得森烯化反应以高度立体选择性的方式在过渡金属络合物上发生。