| Abstract: | Michael condensation of benzal-α-acetothienone 1 with ethyl cyanoacetate, cyanoacetamide and acetoacetamide led to the 2(1H)-pyridone derivatives 2 and 3 . Compound 2 was condensed with aldehydes, and compound 3 with ethyl acetate, to yield the chalcone analogues 4 and the diketone 7 , respectively. By action of phenylhydrazine and hydroxylamine on 4 and 7 , the corresponding pyrazole and isoxazole derivatives 5 , 6 and 9 were obtained. Reaction of urea and thiourea with 1 gave the dihydropyrimidine derivatives 10 and 11 , respectively. |
