New imidazo [1,2-c] quinazoline compounds useful as coronary smooth muscle relaxants and corresponding to the formula: ##STR1## in which: Y is oxygen or sulfur; R.sub.1 is (C.sub.1 -C.sub.6) alkyl optionally substituted by a phenyl itself optionally substituted, a (C.sub.3 -C.sub.6) cycloalkyl, optionally substituted phenyl, furyl, thienyl or acyl; R.sub.2 is hydrogen, a halogen or a (C.sub.1 -C.sub.6) alkyl optionally substituted by amino or dialkylamino; R.sub.3 is hydrogen, (C.sub.1 -C.sub.6) alkyl optionally substituted by an aryl, or R--CO--(CH.sub.2).sub.n -- [n being 1, 2 or 3, and R being (C.sub.1 -C.sub.6) alkoxy, amino, (alkyl or dialkyl)amino, morpholino or methylpiperazinyl]; and X is hydrogen or a halogen. These compounds and their physiologically tolerated salts can be used in medical treatment of coronary smooth-muscle dysfunctions.
新的
咪唑[1,2-c]
喹唑啉化合物,可用作冠状动脉平滑肌松弛剂,对应于以下公式:##STR1## 其中:Y为氧或
硫;R.sub.1为(C.sub.1-C.sub.6)烷基,可选地被苯基取代,本身可选地被取代,(C.sub.3-C.sub.6)环烷基,可选地被取代的苯基,
呋喃基,
噻吩基或酰基;R.sub.2为氢,卤素或(C.sub.1-C.sub.6)烷基,可选地被
氨基或二烷基
氨基取代;R.sub.3为氢,(C.sub.1-C.sub.6)烷基,可选地被芳基取代,或R-CO-(CH.sub.2).sub.n- [n为1、2或3,R为(C.sub.1-C.sub.6)烷氧基,
氨基,(烷基或二烷基)
氨基,吗啉基或甲基
哌嗪基];X为氢或卤素。这些化合物及其生理耐受的盐可用于治疗冠状动脉平滑肌功能障碍。