α-methylthio group were obtained in good yields with high enantioselectivities in the chiral oxazaborolidinone-promoted aldol reactions of a novel silyl ketene acetal, derived from ethyl 2-(methylthio)propionate, with aldehydes. Subsequent desulfurization resulted in an effective preparation of essentially enantiopure syn- and anti-propionate aldols which were separable.
在由2-(甲
硫基)
丙酸乙基酯衍生的新型甲
硅烷基
乙烯酮缩醛的手性氧杂
硼硼烷酮促进的醛醇缩合反应中,以高收率和高对映选择性获得了包含α-甲
硫基的顺式和反式醛醇产物的混合物。醛。随后的脱
硫导致有效制备基本上可分离的基本上对映纯的顺式和反
丙酸的羟醛。