A simple and one-pot synthesis of new chromeno[2,3-d]pyrimidine-triones by a three-component condensation reaction of barbituric acids, aldehydes and cyclohexane-1,3-diones in refluxing ethanol in the presence of p-toluenesulfonic acid (p-TSA) for 3—10 h is reported. Two cyclohexane-1,3-diones, four barbituric acids and six substituted aldehydes were chosen for the library validation. Prominent among the advantages of this new method are operational simplicity, good yields and easy work-up procedures employed.
报道了一种简单的一锅法合成新型色
氨酸[2,3-d]
嘧啶三酮的三组分缩合反应,反应底物为
巴比妥酸、醛和
环己烯-1,3-二酮,在回流的
乙醇中存在
对甲苯磺酸(p-
TSA)的条件下进行,反应时间为3到10小时。选择了两种
环己烯-1,3-二酮、四种
巴比妥酸和六种取代醛进行库的验证。该新方法的主要优点包括操作简单、产率良好和易于后续处理的程序。