Stereoselective addition of organometallic reagents to a chiral acyclic nitrone derived from l-erythrulose
作者:Juan Murga、Raul Portolés、Eva Falomir、Miguel Carda、J. Alberto Marco
DOI:10.1016/j.tetasy.2005.03.013
日期:2005.5
The additions of various organolithium and organomagnesium reagents to a chiralnitrone prepared from l-erythrulose took place with variable diastereoselectivity. The degree and strength of the facial selectivity can be modified if the reaction is performed in the presence of Lewis acid additives: zinc bromide enhances the attack to the Si face of the CN bond whereas diethyl aluminium chloride promotes