The present invention relates to a novel process for the preparation of pyrido[2,1-a]isoquinoline derivatives of the formula
wherein R2, R3 and R4 are each independently selected from the group consisting of hydrogen, halogen, hydroxy, lower alkyl, lower alkoxy and lower alkenyl, wherein lower alkyl, lower alkoxy and lower alkenyl may optionally be substituted by a group consisting of lower alkoxycarbonyl, aryl and heterocyclyl, and the pharmaceutically acceptable salts thereof. The pyrido[2,1-a]isoquinoline derivatives of the formula I are useful for the treatment and/or prophylaxis of diseases which are associated with DPP IV.
本发明涉及一种新型工艺,用于制备式I的
吡啶并[2,1-a]
异喹啉衍
生物,其中R2、R3和R4各自独立地选自
氢、卤素、羟基、较低烷基、较低烷
氧基和较低
烯基,其中较低烷基、较低烷
氧基和较低
烯基可以选择性地被取代为由较低烷
氧羰基、芳基和杂环基组成的基团,以及其药学上可接受的盐。式I的
吡啶并[2,1-a]
异喹啉衍
生物可用于治疗和/或预防与
DPP IV相关的疾病。