Three-Component One-Pot Synthesis of 4-Aryl-2,3-dihydropyrimido[1,2-a]benzimidazol-2-ones Catalyzed byl-Proline
摘要:
An efficient chemoselective synthesis of 4‐aryl‐2,3‐dihydropyrimido[1,2‐a]benzimidazol‐2‐one derivatives from three‐component reactions of 2‐aminobenzimidazole, Meldrum's acid, and aldehydes via [3+3] atom combination is described. The reaction occurs in different conditions such as in DMF as solvent at reflux and in the presence of l‐proline as base catalyst.