An inexpensive carbohydrate derivative used as a chiral auxiliary in the synthesis of α-hydroxy carboxylic acids
作者:Hongwu Yu、C.Eric Ballard、Paul D Boyle、Binghe Wang
DOI:10.1016/s0040-4020(02)00871-2
日期:2002.9
Protected α-hydroxy carboxylic acids were synthesized in moderate yield and high diastereoselectivity by alkylation of glycolate (α-hydroxy acetate) enolates using a d-fructose-derived chiralauxiliary. The new chiral center was assigned the R configuration based on comparisons of optical rotations and on one crystal structure analysis. This alkylation methodology is compatible with several hydroxyl