Ruthenium-Catalyzed Reaction of α,β-Unsaturated Imines with Carbon Monoxide and Alkenes Leading to β,γ-Unsaturated γ-Butyrolactams: Involvement of Direct Carbonylation at Olefinic C−H Bonds as a Key Step
作者:Naoto Chatani、Akihito Kamitani、Shinji Murai
DOI:10.1021/jo026001m
日期:2002.10.1
The reaction of alpha,beta-unsaturated imines with CO and alkenes in the presence of Ru(3)(CO)(12) as a catalyst results in a three-component coupling reaction that gives alpha,alpha-disubstituted beta,gamma-unsaturated gamma-butyrolactams. The reaction proceeds via a two-step sequence involving the initial formation of ketone derivatives by catalytic carbonylation at the beta-olefinic C-H bonds of
在Ru(3)(CO)(12)作为催化剂的情况下,α,β-不饱和亚胺与CO和烯烃的反应导致三组分偶联反应,产生α,α-二取代的β,γ-不饱和γ-丁内酰胺。该反应通过两步序列进行,该过程涉及通过在α,β-不饱和亚胺的β-烯烃CH键上催化羰基化来初步形成酮衍生物,然后亚胺氮对酮基的(未催化的)分子内亲核攻击。碳生成四面体中间体,然后进行1,2-乙基迁移。由(1R)-(-)-myrtenal与叔丁胺的反应衍生而来的环状不饱和亚胺的反应产生了β-氨基环戊烯衍生物,该衍生物是由最初形成的酮的醛醇缩合形成的,