Stereocontrolled synthesis of all four stereoisomers of fully protected 2-amino-3-hydroxypentanoic acid from imines derived from d-glyceraldehyde
作者:Ramón Badorrey、Carlos Cativiela、María D. Díaz-de-Villegas、JoséA. Gálvez
DOI:10.1016/s0040-4020(99)00880-7
日期:1999.12
N-Benzylimines derived from conveniently protected (R)-glyceraldehyde underwent diastereoselective phenylmagnesium bromide addition to afford the corresponding aminodiols, whose absolute configuration at the newly formed stereogenic carbon depends on the O-protecting group. These compounds can be easily transformed into optically pure N-tert-butoxycarbonyl-1-phenyl-2,3-epoxy-1-propylamines, which are
衍生自方便保护的(R)-甘油醛的N-苄基嘧啶经非对映选择性苯基溴化镁加成,得到相应的氨基二醇,其在新形成的立体异构碳上的绝对构型取决于O-保护基。这些化合物可以容易地转化为光学纯的ñ -叔丁氧羰基氨基-1-苯基-2,3-环氧-1-丙胺,这是在合成的关键中间体2-叔丁氧羰基-3- acetyloxypentanoates的赤和苏配置。