Abstract Two convenient methods for synthesis of 4-substituted-5,6,7,8-tetrahydro[1] benzotheino [2,3-d] pyrimidines derivatives (4a-f) were prepared by the displacement
Abstract Two convenient methods for synthesis of 4-substituted-5,6,7,8-tetrahydro[1] benzotheino [2,3-d] pyrimidines derivatives (4a-f) were prepared by the displacement