New Thiazolidinones, Thiazolines and Thiopyrimidines from 3,5-Diphenylcyclohex-2-enone

1-(3,5-Diphenylcyclohex-2-enylidene)hydrazine 3 was prepared and used as a key intermediate for the synthesis of thiazolidin-5-one 6, thiazolidn-4-one 7, thiazolines 8a,b, 9 and thioxodihydropyrimidine 10. Base catalyzed Knoevenagel condensation of compounds 6, 7 and 10 with different aldehydes gave the arylidene derivatives 11a,b, 12a,b and 13a,b respectively. Treatment of compounds 6, 7 and 10 with different aromatic diazonium salts gave azodye derivatives 14a,b, 15a,b and 16a,b. The newly synthesized compounds were characterized by IR, 1H-NMR and mass spectral data.