SbCl5.SiO2: an reusable lewis acid for one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (thiones)

Abstract

Nano-SbCl5.SiO2 and SbCl5.SiO2 are bench-top catalysts which are reusable, readily available, versatile and<br />efficient for promotion of many acid catalyzed organic reactions. These catalysts do not need special<br />precautions for preparation, handling or storage, and they can be stored at an ambient temperature for months<br />without losing their catalytic activity. 4-dihydropyrimidin-2(1H)-ones(thiones) were synthesized in the<br />presence of Nano-SbCl5.SiO2 or SbCl5.SiO2 as a reusable and efficient catalyst.