It is intended to provide a novel method for manufacturing a 6-substituted 1-methyl-1H-benzimidazole derivative and an intermediate of said methods.
[Solution]
A method for manufacturing a 6-substituted 1-methyl-1H-benzimidazole derivative represented by the following general formula (IV)
[wherein R3 represents a hydrogen atom or a C1-C4 alkyl group], comprising manufacturing a 4-substituted N2-methylbenzene-1,2-diamine derivative from a particular 5-substituted N-methyl-2-nitroaniline derivative, subsequently reacting the resulting compound with 4-[(2,4-dioxo-1,3-thiazolidin-5-yl)methyl]phenoxy}acetic acid or an acid chloride or a mixed acid anhydride thereof, and subsequently subjecting the resulting compound to intramolecular dehydration condensation.
本发明旨在提供一种制造 6-取代 1-甲基-1H-
苯并咪唑衍
生物的新方法和所述方法的中间体。
[解决方案]
一种制造由以下通式(IV)代表的 6-取代的 1-甲基-1H-
苯并咪唑衍
生物的方法
[其中 R3 代表氢原子或 C1-C4 烷基],包括从特定的 5-取代的
N-甲基-2-硝基苯胺衍
生物制得 4-取代的 N2-甲基-1,2-
苯二胺衍
生物,随后将所得化合物与4-[(2,4-二氧代-1,3-
噻唑烷-5-基)甲基]苯氧基}
乙酸或其酰
氯或混合酸酐反应,随后将所得化合物进行分子内脱
水缩合。