Disclosed is a process for the synthesis of pimavanserin base with a high yield and purity, which comprises: a) converting tert-butyl-N-[(4-propan-2-yloxyphenyl)methyl]carbamate (Formula (I)) to 1-(isocyanatomethyl)-4-propan-2-yloxybenzene of formula (II) b) adding N-[(4-fluorophenyl)methyl]-1-methylpiperidin-4-amine (Formula (IV)) to the solution obtained in a) to give pimavanserin base, and c) purifying the pimavanserin base obtained in step b).
本发明公开了一种高产率、高纯度合成匹马色林碱的工艺,该工艺包括a) 将 N-[(4-丙-2-基氧基苯基)甲基]
氨基甲酸叔丁酯(式(I))转化为式(II)的 1-(异
氰基甲基)-4-丙-2-基氧基苯 b) 向 a) 中得到的溶液中加入 N-[(4-
氟苯基)甲基]-
1-甲基哌啶-4-胺(式(IV)),得到匹马色林碱;以及 c) 纯化步骤 b) 中得到的匹马色林碱。