Benzoic acid derivatives of the formula:
wherein R1 is a lower alkyl group, R3 is -COOH or a group of the formula:
(wherein n is an integar of 2 to 4, and R4 and R5 independently are a hydrogen atom or an alkyl group or they form, together with the adjacent nitrogen atom, a heterocyclic ring) and X is a halogen atom, and of the formula:
wherein X, n, R4 and R5 are of the same meanings as defined above, which have excellent antiasthmatic and antiinflammatory actions and are useful in the treatment of asthma or inflammatory diseases, can be advantageously produced by subjecting a corresponding aldehyde compound to oxidation or by subjecting corresponding starting compounds to condensation.
式中的
苯甲酸衍
生物:
其中 R1 是低级烷基,R3 是-COOH 或式中的一个基团:
(其中 n 为 2 至 4 的整数,R4 和 R5 独立地为氢原子或烷基,或它们与相邻的氮原子一起形成杂环),X 为卤素原子,以及式中的
其中 X、n、R4 和 R5 的含义与上文所定义的相同,它们具有优异的抗哮喘和抗炎作用,可用于治疗哮喘或炎症性疾病,可通过使相应的醛化合物氧化或使相应的起始化合物缩合而有利地制得。