申请人:Sajja Eswaraiah
公开号:US20070043088A1
公开(公告)日:2007-02-22
A process for preparing lacidipine, comprising reacting a t-butoxy carbonyl methyl aryl phosphonium halide with o-phthalaldehyde, and further reacting a product comprising (E)-3-(2-formylphenyl)-2-propenoic acid, 1,1-dimethyl ethyl ester, without isolation, with ethyl-3-amino crotonate.
一种制备拉西地平的方法,包括将叔丁氧羰基甲基芳基磷銨鹽与邻苯二甲醛反应,进一步将产物(E)-3-(2-甲酰基苯基)-2-丙烯酸,1,1-二甲基乙基酯与乙基-3-氨基巴豆酸酯在不经过分离的情况下反应。