A simple, facile, efficient and one pot three-component procedure for the synthesis of pyrazolo [1, 5-a] pyrimidines, triazolo [1, 5-a] pyrimidines and pyrimido [1, 2-a] benzimidazoles ring systems incorporating phenylsulfonyl moiety was developed via the reaction of 1-aryl-2-(phenylsulfonyl) ethanone derivatives 1a–d with the appropriate heterocyclic amine and triethyl orthoformate and evaluated as Aurora-A kinase inhibitors. ...