[reaction: see text]. The Lewis base-catalyzed additions of alkynyl nucleophiles to aldehydes, ketones, and imines is described. Mechanistic studies strongly indicate that the use of new triethoxysilylalkynes facilitates access of a reactive hypervalent silicate intermediate. This activated carbon nucleophile subsequently undergoes rapid addition to carbonyl compounds and imines, thus affording the
[反应:请参见文字]。描述了路易斯碱催化的炔基亲核试剂向醛,酮和
亚胺的加成。机理研究强烈表明,使用新的三乙氧基甲
硅烷基炔可以促进反应性高价
硅酸盐中间体的进入。随后,该
活性炭亲核试剂快速加入羰基化合物和
亚胺中,从而以中等至高收率提供仲炔丙基和叔炔丙基系统。