Imidazolium-Based Phosphinite Ionic Liquid as Reusable Catalyst and Solvent for One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-(thio)ones

A mild and efficient procedure for the synthesis of 3,4-dihydropyrimidin-2(1H)-(thio)ones in phosphinite ionic liquid is described. This ionic liquid plays a dual role as both the reaction media and also a catalyst, which can be easily recovered and reused in several runs. (C) 2009 Wiley Periodicals, Inc. Heteroatom Chem 20:284-288, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20549