中文摘要：

在聚乙二醇负载的苯磺酸催化作用下,由醛、乙酰乙酸乙酯（或乙酰丙酮）、脲（或硫脲）3组份经Biginelli反应＂一锅法＂合成了系列3,4-二氢嘧啶-2-酮衍生物.该方法反应条件温和、反应时间短、产率高,并且催化剂具有可重复使用的优点.

英文摘要：

3,4-Dihydropyrimidin-2（ 1H）-ones and their derivatives were synthesized in high yields by one-pot threecomponent Beginelli condensation reactions of aldehydes,ethyl acetoacetate or acetylacetone,urea or thiourea in the presence of catalytic amounts of poly（ ethylene glycol）-supported benzene sulfonic acid in ethanol at reflux temperature. This method has such advantages as high yield,short reaction time and simple manipulation. The catalyst is also found to exhibit reusable activity.