An Efficient Synthesis of Pyrrolo[1,2-a]quinazoline Derivatives in Ionic Liquid Catalyzed by Iodine

A mild, green, and facile method for the synthesis of 2,3,3a,4-tetrahydropyrrolo[1,2-a]quinazoline-1,5-dione derivatives is described in high yields by using ionic liquids as green media. The method involves the reaction of 2-aminobenzamides with 4-oxopentanoic acid or 4-aryl-4-oxo-butanoic acid catalyzed by iodine and has the advantages of mild reaction conditions, high yields, one-pot, operational simplicity, and environmentally benign.