▎ 摘　　要

Sulfated graphene and graphene oxide were used successfully as the heterogeneous catalysts for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones (-thiones) through the reaction between ethyl acetoacetate, an aldehyde, and an urea or thiourea, at room temperature in the environmentally friendly solvent. The catalysts could be separated from the reaction mixture and reused at least five times without any considerable loss of the activity. Sulfonated graphene proved to be a more efficient catalyst compared with graphene oxide.