The reaction of 1-(prop-2-yn-1yl)pyrimidin-2(1H)-imin with various halobenzenes in the presence of a palladium catalyst leads to the production of 2-benzylsubstituted imidazo[1,2-a]pyrimidines.
An efficient synthesis of 2-benzylimidazo[1,2-a]pyrimidines in water is accomplished via Pd/C-catalyzed reaction of 2-imino-1-(2-propynyl)pyrimidine with various aryl iodides in the presence of K2CO3 as the base. (C) 2010 Elsevier Ltd. All rights reserved.