Xanthone derivatives of the formula (I): ##STR1## (wherein W, X, Y and Z which may be the same or different represent a hydrogen atom, a halogen atom or a lower alkyl group having 1 to 4 carbon atoms; A is hydrogen atom or together with Z forms a --CH.sub.2 -- group which binds to a phenyl carbon adjacent the phenyl carbon to which the oxygen of the group ##STR2## is attached to form a cyclic methylene chain; B is a hydroxymethyl group, a lower alkoxycarbonyl group having 1 to 4 carbon atoms, or a carboxyl group, provided that W is neither a hydrogen atom nor a 7-position methyl group when X, Y and Z are each a hydrogen atom, and A is a hydrogen atom and B is a carboxyl group or a lower alkoxycarbonyl group), as well as non-toxic salts thereof when B is a carboxyl group, and a process for preparing the same are disclosed. The compounds of formula (I) in accordance with the present invention are useful as diuretics having uricosuric activity and can be used in the treatment of edema or hypertension.
公开了公式(I)的
黄酮衍
生物:##
STR1##(其中W、X、Y和Z可以相同也可以不同,代表
氢原子、卤素原子或具有1至4个
碳原子的较低烷基基团;A是
氢原子或与Z一起形成--CH.sub.2--基团,该基团与邻近
苯环上的
苯碳相连,该
苯碳上连接有基团##
STR2##的
氧原子以形成环状亚
甲基链;B是
羟甲基基团、具有1至4个
碳原子的较低烷
氧羰基基团,或羧基团,前提是当X、Y和Z分别为
氢原子时,W既不是
氢原子也不是7位
甲基基团,且A是
氢原子且B是羧基团或较低烷
氧羰基基团时),以及其非毒性盐(当B为羧基团时),以及制备它们的方法。根据本发明的公式(I)的化合物可用作具有利尿和
利尿酸活性的利尿剂,并可用于
水肿或高血压的治疗。