AN EFFICIENT PREPARATIVE ROUTE TO FUSED IMIDAZO[1,2-a]-PYRAZIN-4-ONE DERIVATIVES

摘要

New fused imidazo[1,2-a] pyrazin-4-one derivatives(1a-f) are easily obtained from ring closure reactions of ethyl imidazole-2-carbocylate derivatives (4a,c,d)or imidazole-2-carboxamide derivatives (5b,e).