申请人:University of Nebraska
公开号:US05490952A1
公开(公告)日:1996-02-13
A novel zerovalent copper species and an organocopper reagent are disclosed. The zerovalent copper species is directly produced by reaction of a reducing agent with a combination of copper cyanide or halide and an alkali metal halide salt. The organocopper reagent resulting from the reaction of the zerovalent copper species and an organic compound having one or more stable anionic leaving groups is a stable reagent that will not significantly homocouple and under controlled conditions tolerates the presence of nitrile, epoxide, imine, enone, ketone, ester, allyl and benzyl groups within the organo radical. The reagent can be controlled so that it will selectively add to an organic electrophile such as an acid halide or aldehyde while other less reactive electrophilic groups are present. The reagent will also add under controlled conditions to epoxide, enone, imine and ketone groups.
本发明揭示了一种新型的零价铜物种和有机铜试剂。该零价铜物种是通过还原剂与铜氰化物或卤化物以及碱金属卤化物盐的组合物直接反应而产生的。由零价铜物种和具有一个或多个稳定阴离子离开基团的有机化合物反应产生的有机铜试剂是一种稳定的试剂,在受控条件下不会显著发生同种偶联,并且能够容忍有机基团中存在腈、环氧、亚胺、烯酮、酮、酯、烯丙基和苄基。该试剂可以被控制,以便在存在其他较不反应的亲电基团时,选择性地加到有机电子亲合物,如酸卤或醛上。在受控条件下,该试剂还可以加到环氧、烯酮、亚胺和酮基团上。