Compounds of the general formula:
wherein A and B are both hydrogen, or one of A and B is
a group (G) of the formula:
and the other is a group R5 wherein
R1 is an aryl group or a heterocyclic group, both of them being optionally substituted, and R4 and R5 are both hydrogen or together form a single chemical bond.
R and R' are independently hydrogen, halogen nitro lower alkyl or lower alkoxy, and
R3 and R3' are independently carboxy or its functional derivative with the proviso that
a) when A and B are both hydrogen. then R and R' cannot be both hydrogen, and, where applicable, pharmaceuticably acceptable salts thereof are hyaluronidase inhibitors. and useful as anti- allergic agent and anti-ulcerous agent. Among the compound (1*). those wherein when one of A and B is the group (G) and the other is the group R5 wherein R4 and R5 together form a single chemical bond, R' is unsubstituted aryl and R2 and R2 are both hydrogen, then R3 and R3 are independently carboxy or its functional derivative other than methly ester, are novel.
通式如下的化合物
其中 A 和 B 均为氢,或 A 和 B 之一为
式中的基团 (G)
而另一个是基团 R5,其中
R1 是芳基或杂环基,两者均可选择被取代,R4 和 R5 均为氢或共同形成一个
化学键。
R 和 R' 独立地为氢、卤素硝基低级烷基或低级烷氧基,以及
R3 和 R3'独立地为羧基或其官能衍
生物,但有以下条件
a) 当 A 和 B 都是氢时,则 R 和 R' 不能都是氢,适用时,其药学上可接受的盐是
透明质酸酶抑制剂,可用作抗过敏剂和抗溃疡剂。在化合物(1*)中,当A和B之一为基团(G),另一个为基团R5,其中R4和R5共同形成一个
化学键,R'为未取代芳基,R2和R2均为氢,则R3和R3独立地为羧基或除甲酯以外的其官能衍
生物的化合物(1*)是新颖的。