1-Azaxanthone-3-carboxylic acids, their preparation and pharmaceutical compositions containing them
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0026675A1
公开(公告)日:1981-04-08
Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I)
wherein R is hydrogen, alkyl, alkoxy or halogen; R, and R2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/ or treating allergic diseases. The compound of the formula (I) can be produced by reacting a compound of the formula:
wherein R and m have the same meaning as defined above; R3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula:
wherein R, and R2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary.
新型 1-氮杂黄酮-3-羧酸衍生物,如下式(I)所示
其中 R 为氢、烷基、烷氧基或卤素;R 和 R2 相同或不同,且各自为氢、烷基或烯基;m 为 1 或 2;及其生理上可接受的盐,可用作预防和/或治疗过敏性疾病的有效药物。式(I)化合物可通过与式化合物反应制得:
其中 R 和 m 的含义与上述定义相同;R3 是羧基或通过水解可转化为羧基的基团;X 是磷酸烷基或卤素,与式化合物反应:
其中 R 和 R2 的含义与上述定义相同,或其盐,必要时进行水解。