Nucleophilic ring opening of <i>trans</i>-2,3-disubstituted epoxides to β-amino alcohols with catalyst-controlled regioselectivity
作者:Michelle Lee、Jessica R. Lamb、Maria J. Sanford、Anne M. LaPointe、Geoffrey W. Coates
DOI:10.1039/c8cc07200k
日期:——
We report the nucleophilic ring opening of unsymmetrical trans-epoxides to β-amino alcohols with catalyst-controlled regioselectivity. This cationic aluminum salen catalyst, which contains bulky mesityl groups in the ortho-position of the phenoxide and a 2,2′-diamino-1,1′-binaphthalene backbone, transforms a variety of epoxides with high regioselectivity using nitrogen-containing nucleophiles. Unlike
我们报道了不对称反式环氧化物对β-氨基醇的催化控制区域选择性的亲核开环。这种阳离子铝salen催化剂在酚盐的邻位和2,2'-二氨基-1,1'-联萘骨架的邻位含有庞大的异氰酸酯基,它利用含氮亲核试剂以高区域选择性转化了多种环氧化物。不同于大多数报道,其中区域选择性是受底物控制的,该系统中的区域选择性是由催化剂控制的,并允许无偏反式环氧化物的选择性亲核开环。