PROCESS FOR PREPARING 4-AMINO-6,7-DIMETHOXY QUINAZOLINE DERIVATIVES

摘要

4-Amino-6,7-dimethoxy quinazoline derivs of formula (I) and their acid addn. salt are prepd. by reacting a cpd of formula (II) with a cpd. of formula (III) in the presence of C1-4 lower alcohol, formamide, dimethyl formamide, dimethylacetamide or dimethylsulfoxide at an elevated temperature. In the formulas, R is furyl, tetrahydrofuryl, 1,4-benzodioxan-2-yl or butanoyl; n is 2 or 3. (I) are useful as an antihyper tensive agent.