Copper(I) mediated highly diastereoselective conjugate addition of grignard reagents to 2-silyloxycyclopentenecarboxylates
作者:Valéry Dambrin、Monique Villiéras、Céline Moreau、Hassen Amri、Loïc Toupet、Jean Villiéras
DOI:10.1016/0040-4039(96)01386-x
日期:1996.8
The conjugate addition of magnesium cuprates to 2-silyloxycyclopentenecarboxylates leads, after desilylation, to 5-substituted-2-hydroxycyclopentanecarboxylates in high yields and diastereoselectivities. The 2-silyloxy derivatives avoid the formation of the SN2′ reaction by-products. No loss of selectivity is also observed when a catalytic amount of cuprous salt is used.
在去甲硅烷基化之后,将铜酸钾共轭添加到2-甲硅烷氧基环戊烯羧酸酯中导致高产率和非对映选择性的5-取代的-2-羟基环戊烷羧酸酯。2-甲硅烷氧基衍生物避免了SN 2'反应副产物的形成。当使用催化量的亚铜盐时,也没有观察到选择性的损失。