A stereoselective organic base-catalyzed protocol for hydroamination of alkynes under solvent-free conditions
作者:Vadym Kozell、Fariba Rahmani、Oriana Piermatti、Daniela Lanari、Luigi Vaccaro
DOI:10.1016/j.mcat.2018.04.018
日期:2018.8
straightforward and atom-economical process for the synthesis of substituted nitrogen-containing alkenes. Herein we report a novel protocol that involves for the first time solvent-free conditions (SolFC) and the use of an organic base, namely 2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (BEMP) to stereoselectively promote the process. The scope of this metal-free protocol
炔烃的加氢胺化是合成取代的含氮烯烃的直接且原子经济的方法。在这里,我们报告了一种新颖的方案,该方案首次涉及无溶剂条件(SolFC)和有机碱的使用,即2-叔丁基亚氨基-2-二乙氨基-1,3-二甲基过氢-1,3,2-二氮杂磷(BEMP)立体选择性地促进了这一过程。通过广泛的研究评估了该无金属方案的范围,得出的结论是,在大多数情况下,产率和立体选择性值非常高(14个实例,产率高达95%,Z / E高达99% )。