Compounds of formula (I): ##STR1## in which: Q is nitrogen or .dbd.CH--; R.sup.1 and R.sup.2 are hydrogen, alkyl, alkoxy, hydroxy, trifluoromethyl or halogen; and R.sup.3 is a substituted alkyl groups or a pharmaceutically acceptable salt thereof have valuable anti-allergic and anti-asthmatic activities. The compounds are prepared by reacting a corresponding compound where R.sup.3 is replaced by a hydrogen atom with a compound to introduce the group R.sup.3.
式(I)的化合物:##STR1##其中:Q是氮或.dbd.CH--; R.sup.1和R.sup.2是氢、烷基、烷氧基、羟基、三
氟甲基或卤素;R.sup.3是取代烷基基团或其药用可接受盐,具有有价值的抗过敏和抗哮喘活性。通过将R.sup.3被氢原子取代的相应化合物与引入基团R.sup.3的化合物反应制备这些化合物。