Abstract
Cyclocondensation of compound (1) with sulfanylacetic acid under reflux in acetic acid furnished the novel 4-thiazolidinone derivative (2). The novel benzo[d][1,3]benzoxazin-4-one (3) was obtained by the reaction of compound (2) with 4-methoxybenzaldehyde at reflux temperature in ethanol and piperidine. The non-isolable intermediate(4) was exploited to synthesize some novel aminothiophene (6 and 7), thiazolidine (10 and 11), and aminothiazole (12 and 13) derivatives. The reaction of compound (1) with isothiocyanates in the presence of elemental sulfur was investigated. The structure of the newly synthesized compounds was confirmed on the basis of analytical and spectral data.