Acetals of lactams and acid amides. 39. Synthesis of three-ring derivatives of pyrido [l,2-a] pyrimidines on the basis of the reaction of dimethylformamide acetal with dicyanomethylenecycloalkanes
Acetals of lactams and acid amides. 39. Synthesis of three-ring derivatives of pyrido [l,2-a] pyrimidines on the basis of the reaction of dimethylformamide acetal with dicyanomethylenecycloalkanes