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Abstract
4,5-Diaryl-2-mercaptoimidazoles (II) were synthesized and reacted with chloroacetic acid to form the S-carboxymethyl derivatives (III). The latter compounds were readily cyclised into the corresponding 5,6-diaryl-2,3-dihydroimidazo(2,1-b) thiazol-3-ones (IV) by the action of acetic anhydride. The 2-aryl-methylene (V) and the 2-arylhydrazono (VI) derivatives of (IV) were prepared. Compounds (IV) reacted with the aniline to give the anilide (VII) and with hydrazine hydrate to give the hydrazide (VIII), which condensed with the aromatic aldehyde to give the hydrazones (IX).