The present invention provides a novel process for the preparation of 7-chloro-2,3,4,5-tetrahydro-1H-1-benzazepin-5-one. The present invention also provides an improved process for the preparation of 7-chloro-1-(2-methyl-4-nitrobenzoyl)-5-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine. The present invention further provides an improved process for the preparation of 7-chloro-1-[2-methyl-4-[(2-methylbenzoyl)amino]benzoyl]-5-oxo-2,3,4,5-tetrahydro-1H-1-benzazepine.
本发明提供了一种制备7-
氯-2,3,4,5-四氢-1H-1-苯并氮杂环-5-酮的新工艺。本发明还提供了一种改进的制备7-
氯-1-(2-甲基-4-
硝基苯酰基)-5-氧代-2,3,4,5-四氢-1H-1-苯并氮杂环的工艺。本发明还提供了一种改进的制备7-
氯-1-[2-甲基-4-[(2-甲基苯甲酰)
氨基]苯甲酰基]-5-氧代-2,3,4,5-四氢-1H-1-苯并氮杂环的工艺。