3-oxopentanoate, aromatic aldehydes and thiourea with a catalytic amount of HCl at reflux temperature has been used for the synthesis of 4-aryl-6-ethyl-5-(methoxycarbonyl)-3,4-dihydropyrimidin-2(1H)-thiones (1-16). In addition, Lewis acids such as FeCl(3).6H(2)O and/or H(3)BO(3) were also used as catalysts for one-pot synthesis of the products. Compared to the classical Biginelli reaction conditions
涉及3-氧
戊酸甲酯,芳族醛和
硫脲与催化量的HCl在回流温度下缩合的Biginelli反应已用于合成4-芳基-6-乙基-5-(甲氧基羰基)-3,4-二氢
嘧啶-2(1H)-
硫酮(1-16)。此外,
路易斯酸,如FeCl(3).6H(2)O和/或H(3)BO(3)也用作一锅合成产物的催化剂。与经典的Biginelli反应条件相比,
路易斯酸的使用具有收率高和反应时间短的优点。通过在离体大鼠回肠和胸主动脉上进行的试验筛选了1-16的
钙通道阻滞剂活性。尽管产品11 2-
硝基苯基衍
生物对BaCl(2)刺激的大鼠回肠具有有效的解痉活性,但对KCl刺激的大鼠胸主动脉没有血管舒张活性。