Efficient synthesis of benzimidazo[1,2-<i>a</i>]pyrimidinone derivatives<i>via</i>catalyst-free reactions of Baylis-Hillman acetates, alcohols, and amines with 2-aminobenzimidazole
Benzimidazo[1,2‐a]pyrimidinone and its derivatives were easily prepared in good to excellent yields via tandem reactions of 2‐aminobenzimidazole with Baylis–Hillmanacetates, alcohols, and amines without the use of catalyst and additive in one‐pot process. The method provided an efficient and facile route to the title fused heterocyclic compounds with different functional groups. J. Heterocyclic Chem