Novel thienopyrimidine derivatives of azetidinone possessing the combined features of the cholesterol absorption inhibitor drug ezetimibe and potential antihyperlipidemic 2-substitutedthienopyrimidin-4-ones were synthesized and characterized by spectroscopic data and elemental analysis. These compounds were evaluated for their lipid-lowering activity in Wistar albino rats. Some of them showed significant lipid-lowering effects comparable to those of the standard drug, gemfibrozil, at the same dose levels.

A rapid microwave-assisted green chemical synthesis of condensed 2-substituted-pyrimidin-4(3H)-ones 3, 4, and 5 involving the condensation of a variety of nitriles with o-aminoesters of thiophene 2a-e, benzene 2f, dimethoxybenzene 2g and quinazolinone 2h in the presence of catalytic amount of HCl alone or with the Lewis acid AlCl 3 under solvent-free conditions, is described for the first time. This novel and clean one-pot methodology, which is characterized by very short reaction times and easy workup procedures, can be exploited to generate a diverse library of condensed pyrimidine heterocycles.

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