The invention relates to a method of synthesizing methyl (Z)-3-[[4-[methyl[2-(4-methyl-1-piperazinyl)acetyl] amino]phenyl] amino]phenylmethylene)-oxindole-6-carboxylate of formula (1), known under the generic name of intedanib or nintedanib. The present method comprises a) a reaction of methyl oxindole-6-carboxylate with acetic anhydride at a temperature of 130 - 140°C, providing methyl 1-acetyl-oxindole-6-carboxylate; b) a reaction of methyl 1-acetyl-oxindole-6-carboxylate of with trimethyl orthobenzoate and acetic anhydride in the presence of toluene, providing methyl (E)-1-acetyl-3-(methoxyphenylmethylene)-oxindole-6-carboxylate; c) a reaction (E)-1-acetyl-3-(methoxyphenylmethylene)-oxindole-6-carboxylate with N-(4-aminophenyl)-N,4-dimethyl-1-piperazine acetamide and subsequently with an alkali hydroxide or alkali alkoxide in methanol or ethanol without isolation of the intermediate, providing methyl (Z)-3-[[4-[methyl[2-(4-methyl-1-piperazinyl)acetyl]amino]phenyl] amino]phenylmethylene)-oxindole-6-carboxylate, wherein the reaction is conducted at a temperature of 50 to 100°C. (1)
该发明涉及一种合成甲基(Z)-3-[[4-[甲基[2-(4-甲基-1-
哌嗪基)乙酰]
氨基]苯基]
氨基]苯甲亚
甲酸酯的方法,通用名称为恩替他尼或尼替他尼。该方法包括:a)将甲基氧
吲哚-6-
羧酸酯与
乙酸酐在130-140°C的温度下反应,得到甲基1-乙酰氧
吲哚-6-
羧酸酯;b)将甲基1-乙酰氧
吲哚-6-
羧酸酯与
对甲苯甲酸三甲酯和
乙酸酐在
甲苯存在下反应,得到甲基(E)-1-乙酰-3-(
甲氧基苯基亚甲基)-氧
吲哚-6-
羧酸酯;c)将(E)-1-乙酰-3-(
甲氧基苯基亚甲基)-氧
吲哚-6-
羧酸酯与N-(4-
氨基苯基)-N,4-二甲基-1-
哌嗪乙酰胺反应,随后与
甲醇或
乙醇中的碱性氢氧化物或碱性醇醚反应,无需中间体分离,得到甲基(Z)-3-[[4-[甲基[2-(4-甲基-1-
哌嗪基)乙酰]
氨基]苯基]
氨基]苯甲亚
甲酸酯,反应温度为50至100°C。