抗心肌缺血药3-{4-[(2-羟基-3-烷氨基)丙氧基]苯基(苄基)}-取代4(3H)-喹唑酮的合成

SYNTHESIS OF 3-[4-[(3-ALKYLAMINO-2-HYDROXY) PROPOXY] PHENYL (BENZYL)] - SUBSTITUTED 4(3H)-QUINAZOLINONES AS ANTIMYOCARDIAL ISCHEMIC AGENTS

β-受体阻断药在心血管病的治疗中占有相当重要的地位,对缺血性心脏病有肯定的疗效。但也存有不良反应或禁忌症,其中有的是由于其选择性不高所致。因此,寻找特异性的β_1受体阻断药是目前研究抗心肌缺血药的一个重要方面。据报道,在β-受体阻断药的基本有效结构的苯环的对位与4(3H)

In order to search for effective antimyocardial ischemic agents, fourteen new 3 4-[(3-alkylamino-2-hydroxy)propoxy] phenyl(benzyl)]-substituted 4(3H)-quin zolinones (Ⅱ) were synthesized. Substituted o-aminobenzoic acids used as the starting materials were allowed to react with acetic anhydride and then p-aminophenol (method A), or with N- (4- hydroxyphenyl)formamide (method B), or with thionyl chloride and then N - (4 - hydroxybenzyl) formamide (methode C) to form 3-[(4-hydroxyphenyl(benzyl)]-substituted 4(3H)-quinazolinones (Ⅲ). The intermediate Ⅲ reacted with epichiorohydrin to form the epoxides (Ⅳ). The reaction of Ⅳ with an excess of isopropylamine or tert-butylamine in boiling chloroform gave the desired products. Of all the compounds synthesized, Compounds Ⅱ_(3～5) and Ⅱ_(13) were found to increase the tolerance of mice to hypoxia. Further evaluation is in progress.