Facile approach to the synthesis of substituted thieno[2,3-d]pyrimidin-4- ones
Condensation of Gewald's thiophenes substituted with a dimethylaminomethyleneamino group at position 2 with primary amines yields 5/6-aryl-thieno[2,3-d] pyrimidin-4-ones with variable substituents at the N3 position.