A heterocyclic compound useful as an antiallergic agent is provided.
A compound represented by the following formula (1) or a salt thereof:
wherein the ring A is a homocyclic or heterocyclic ring; the ring B is a heterocyclic ring which contains G and nitrogen atom N as constituent atoms thereof, wherein G is CH or N; R1 is a carbonyl group or an alkylene group; R2a and R2b are an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group; X is an oxygen atom or a sulfur atom; Z is a hydroxyl group, an alkoxy group, a cycloalkyloxy group, an aryloxy group, an aralkyloxy group, an amino group, or an N-substituted amino group; and n is 0 or 1; with the proviso that when the ring A is a benzene ring or when the ring B is a piperazine ring, R1 is an alkylene group which may have a substituent.
提供了一种可用作抗过敏剂的
杂环化合物。
由下式(1)代表的化合物或其盐:
其中,环 A 是均环或杂环;环 B 是杂环,其组成原子包含 G 和氮原子 N,其中 G 是 CH 或 N;R1 是羰基或亚烷基;R2a 和 R2b 是烷基、环烷基、芳基或杂环基;X 是氧原子或
硫原子;Z 是羟基、烷氧基、环烷氧基、芳氧基、芳烷氧基、
氨基或 N-取代
氨基;n 是 0 或 1;但当环 A 是苯环或环 B 是
哌嗪环时,R1 是亚烷基,该亚烷基可能具有取代基。