Novel aromatic carboxylic amides of the general formula: ##EQU1## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom or an alkyl group having 1-4 carbon atoms, R.sub.3 and R.sub.4 are hydrogen atoms or together form another chemical bond, each X is a hydroxyl group, a halogen atom, an alkyl group having 1-4 carbon atoms and an alkoxy group containing 1-4 carbon atoms, and n is an integer of 1-3, with the proviso that when two Xs are alkyl or alkoxy groups, they may be connected together to form a ring, as well as pharmaceutically acceptable salts thereof. These compounds possess a strong antiallergenic action and are thus useful for treatment of asthma, hay fever, anticaria and atopic dermatitis. The above aromatic carboxylic amides can be prepared by reacting a reactive functional derivative of the general formula: ##EQU2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, X and n have the same meanings given above, with an aminobenzoic acid of the formula: And, if desired, converting the resulting amide into the corresponding salts.
一种新型芳香族
羧酸酰胺,其通式为:##EQU1## 其中R.sub.1和R.sub.2分别为氢原子或含有1-4个碳原子的烷基基团,R.sub.3和R.sub.4为氢原子或共同形成另一种
化学键,每个X为羟基,卤素原子,含有1-4个碳原子的烷基基团和含有1-4个碳原子的烷氧基,n为1-3的整数,但当两个X为烷基或烷氧基时,它们可以连接在一起形成环,并且其药物可接受的盐。这些化合物具有强烈的抗过敏作用,因此可用于治疗哮喘、花粉热、荨麻疹和特应性皮炎。上述芳香族
羧酸酰胺可以通过将通式的反应性官能衍
生物:##EQU2## 其中,R.sub.1、R.sub.2、R.sub.3、R.sub.4、X和n具有上述相同的含义,与苯
氨酸反应制备,如果需要,将得到的酰胺转化为相应的盐。