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.
提供一种作为抗过敏药物有用的
杂环化合物。该化合物由以下公式(1)或其盐表示:其中,环A是同环或异环环;环B是含有G和
氮原子N作为其组成原子的杂环,其中G是CH或N;R1是羰基基团或烷基基团;R2a和R2b是烷基基团、
环烷基基团、芳基基团或杂环基团;X是
氧原子或
硫原子;Z是羟基基团、烷
氧基团、
环烷氧基团、芳
氧基团、芳烷
氧基团、
氨基或N-取代
氨基;n为0或1;但当环A为
苯环或环B为
哌嗪环时,R1为可能具有取代基的烷基基团。