申请人:Takeda Chemical Industries, Ltd.
公开号:US04302463A1
公开(公告)日:1981-11-24
Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) ##STR1## wherein R is hydrogen, alkyl, alkoxy or halogen; R.sub.1 and R.sub.2 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: ##STR2## wherein R and m have the same meaning as defined above; R.sub.3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary.
1-氮杂黄酮-3-羧酸衍生物,其化学式如下所示(I)##STR1##其中R为氢、烷基、烷氧基或卤素;R.sub.1和R.sub.2相同或不同,每个都是氢、烷基或烯基;m为1或2;以及它们的生理上可接受的盐,可用作预防和/或治疗过敏疾病的有效药物。化合物的化学式(I)可通过将化合物与以下化学式反应而制备:##STR2##其中R和m的含义与上述定义相同;R.sub.3是羧基或可通过水解转化为羧基的基团;X为烷基磷酸酯基团或卤素,与以下化学式的化合物反应:##STR3##其中R.sub.1和R.sub.2的含义与上述定义相同,或其盐,并进行必要的水解。