SYNTHESIS OF SOME NEW TYPES OF THIAZOLYL COUMARINS

3-Acetyl coumarins I react with substituted sulfanilamides in the pres ence of iodine to give substituted 3-(2-arylamino-4-thiazolyl)-2H-1-be nzopyran-2-ones (II). The structures of these compounds have been conf irmed and they were converted into their acetyl derivatives (III). Con densation of various 3-(omega-bromoacetyl)-2H-1-benzopyran-2-ones (IV) with rubenic acid in the presence of anhydrous ethanol and dimethyl f ormamide yielded 3,3'[2,2' -bithiazole]-4,4'-dylbis-[2H-1-benzopyran-2 -one] (V). The structural assignment of these products is based on the elemental analyses and spectral (IR, PMR and MS) data.