8-ethoxy-3-acetyl coumarin 1, thiosemicarbazide 2 was condensed under microwave irradition gives 2-(1-(8-ethoxy- 2-oxo-2H-chromen-3-yl) ethylidene) hydrazinecarbothioamide 3 then 3, chloroacetyl chloride 4, substituted aryl aldehydes 5, were condensed in presence of alum catalyst to formed 5-benzylidene-2-((E)-(1-(8-ethoxy-2-oxo-2Hchromen- 3yl)ethylidene)hydrazono) thiazolidin-4-one 6, by simple grinding technique at room temperature under solvent free condition. Synthesized compounds were confirmed by IR, NMR, Mass and CHN analysis.
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