Synthesis, chiroptical properties and absolute configuration of α-phenylglycidic acid
作者:Christian P. Whitman、J.Cymerman Craig、George L. Kenyon
DOI:10.1016/s0040-4020(01)96519-6
日期:1985.1
(+)-potassium salt, were all configurationally related to S-(+)-atrolactic and mandelic acids. The configurational assignments made on the basis of the chiroptical data were confirmed by lithium aluminum hydride reduction of the (-)-2-octyl S- and R-α-phenylglycidates, which led exclusively to the R-(-)- and S-(+)-2-phenyl-1, 2-propanediols, respectively, previously related configurationally to R-(-)- and S-(+)-atrolactic
α-苯基缩水甘油酸钾(扁桃酸酯消旋酶的不可逆抑制剂)的(+)-和(-)对映体是通过用R-(-)-2-辛醇拆分非对映体酯而合成的。拆分的α-苯基缩水甘油酸酯的碱催化开环得到2,3-二羟基-2-苯基丙酸的对映体,该对映体也通过使用麻黄碱拆分外消旋二羟基酸而获得。比较α-苯基缩水甘油酸和2,3-二羟基-2-苯基丙酸的酯与结构相似的阿奇和扁桃酸及其2-甲氧基衍生物的手性,表明(-)-甲基2对应于α-苯基缩水甘油酸钾的(+)-对映异构体的,3-二羟基-2-苯基丙酸酯,以及衍生自相同(+)-钾盐的α-苯基缩水甘油酸的酯,都与S-(+)-香气和扁桃酸有关。根据手性数据确定的构型分配通过氢化铝锂还原(-)-2-辛基S-和R-α-苯基缩水甘油酯而得到证实,这仅导致R-(-)-和S- (+)-2-苯基-1,2-丙二醇分别先前在构型上与R-(-)-和S-(+)-芳构酸相关。