α-Enones in Heterocyclic Synthesis, Part I. Classical Synthetic and Environmentally Friendly Synthetic Approaches to Alkyl and Acyl Azoles and Azines

The utility of 1- N,N-dimethylaminopent-1-en-3-one and 1-(4-acetylphenyl)-3-dimethyl aminopropenone in the synthesis of several new azolotriazine, pyrazolo[3,4- d]pyridazine, isoxazolo[3,4- d]pyridazine, azolopyrimidine and pyridine derivatives by conventional heat and also on microwave irradiation, is reported.