Reactivity of dichlorosilanes with lithium ester enolates: synthesis of 3,3-disubstituted 3-silaglutarates
作者:Abdelhafid Djerourou、Luis Blanco
DOI:10.1016/0022-328x(94)24757-a
日期:1995.1
3,3-Disubstituted 3-silaglutarates were synthesized by reaction of the lithium enolate of ethyl acetate with diclorosilanes at −94°C. When a phenyl group is linked to the silicon atom the reaction in THF gave mainly the silaglutarate. In other cases alkylsilylketene acetals were formed in proportions similar to or greater than that of the silaglutarate. The presence of HMPA increased the ratio of C-
通过使
乙酸乙酯的烯醇
锂与二
氯硅烷在-94℃下反应,合成3,3-二取代的3-
硅戊二酸酯。当苯基连接到
硅原子上时,在THF中的反应主要产生
硅谷
氨酸盐。在其他情况下,烷基
硅烷基烯酮
缩醛的形成比例与
硅谷
氨酸盐相似或更高。HMPA的存在增加了C-与O-甲
硅烷基化产物的比例,并允许以高收率制备3-
硅烷基
戊二酸酯3,3-二烷基酯。