Dihydronaphthyridine derivatives, their preparation and compositions containing them
申请人:SANKYO COMPANY LIMITED
公开号:EP0094245A2
公开(公告)日:1983-11-16
Compounds of formula (I)
(wherein R1 represents a hydrogen atom or an alkyl or acyl group, R2 represents an alkyl group and R3 represents a hydrogen or halogen atom or an alkyl, hydroxy, alkoxy, aryloxy, optionally substituted pyridyloxy, alkylthio, arylthio, amino or mono- or di-substituted amino group) and pharmaceutically acceptable acid addition salts thereof have useful analgesic and anti-inflammatory properties. They may be prepared by condensing a 5-amino-2-(R3)pyridine with a ketone of formula R2COCH3, or with a condensation product of said ketone, to give a compound of formula (1) in which R1 represents a hydrogen atom and then, if desired, alkylating or acylating that compound.
式(I)化合物
(其中 R1 代表氢原子或烷基或酰基,R2 代表烷基,R3 代表氢原子或卤素原子或烷基、羟基、烷氧基、芳氧基、任选取代的吡啶氧基、烷硫基、芳硫基、氨基或单或二取代氨基)及其药学上可接受的酸加成盐具有有用的镇痛和消炎特性。它们可以通过将 5-氨基-2-(R3)吡啶与式 R2COCH3 的酮缩合,或与所述酮的缩合产物缩合,得到式(1)化合物(其中 R1 代表氢原子),然后,如果需要,将该化合物烷基化或酰化来制备。