3-(benzoylamino)imidazo[1,2-a]pyri-din-2(3H)-ones. -A series of imidazo[1,2-a]pyridin-2-ones (III) are prepared by a novel cascade reaction starting from easily available starting materials. Uncyclized products are obtained in the reactions of (IV) and (VI). -(TU*, S.; ZHANG, J.; JIA, R.; ZHANG, Y.; JIANG, B.; SHI, F.; Synthesis 2007, 4, 558-564; Key Lab.