The present invention provides an efficient route to the C-13 side chain of the anti-cancer drug paclitaxel (TAXOL) and its analogs. The process includes the resolution of racemic erythro 2-hydroxy-3-amino-3-phenylpropionamide by diastereomeric crystallization and its conversion via various intermediates to the threo-ethylester and threo-methylester isomers.
本发明提供了一种高效的路线,用于合成抗癌药物
紫杉醇(TAXOL)及其类似物的C-13侧链。该过程包括通过对外消旋赤霉烷型2-羟基-3-
氨基-3-苯基丙酰胺进行对映异构晶体分离和通过各种中间体转化为threo-
乙酸乙酯和threo-
甲酸甲酯异构体。