Trifluoromethyl group induced highly stereoselective synthesis of α-hydroxy carbonyl compounds
作者:Yoshitomi Morizawa、Arata Yasuda、Keiichi Uchida
DOI:10.1016/s0040-4039(00)84388-9
日期:1986.1
The reaction of enolate prepared from ethyl 3-methyl-4,4,4-tri-fluorobutyrate with MoO5-Py-HMPA complex provides ethyl (2S★,3S★)-2-hydroxy-3-methyl-4,4,4-trifluorobutyrate predominantly. In contrast, NaBH4 reduction of the corresponding 2-oxobutyrate affords (2R★, 3S★)-hydroxyester preferentially.
由3-甲基-4,4,4-三氟丁酸乙酯与MoO 5 -Py-HMPA配合物制得的烯醇化物提供乙基(2S ★,3S ★)-2-羟基-3-甲基-4,4,主要为4-三氟丁酸酯。相反,NaBH 4还原相应的2-氧代丁酸酯可优先得到(2R ★,3S ★)-羟基酯。