A simple and highly efficient approach for the synthesis of γ-Benzopyranones and 3,4-
Dihydropyrimidin-2(1H)-ones/thiones using ammonium acetate as a promoter under thermal as well as
microwave irradiation using solvent-free conditions has been demonstrated.
Keywords: γ, 3, 4-dihydropyrimidin-2(1H)-ones/thiones, ammonium acetate, solventfree
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