Highly Enantioselective Carbonyl-ene Reactions Catalyzed by a Hindered Silyl−Salen−Cobalt Complex
作者:Gerri E. Hutson、Apurva H. Dave、Viresh H. Rawal
DOI:10.1021/ol071342d
日期:2007.9.1
enantioselective carbonyl-enereactions of various 1,1-disubstituted and trisubstituted alkenes with ethyl glyoxylate. The reactions are catalyzed by a new Co-salen complex, in which bulky triisobutylsilyl (TIBS) substituents occupy the positions ortho to the phenolic oxygens. This complex catalyzes the reactions under nearly ideal conditions - at room temperature and using catalyst loadings as low