Recyclization of 4-alkyl(aryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans with 2-aminoethanol and (2-furyl)methylamine

Synthesis of 2-[4-aryl(hetaryl, cyclopropyl)thiazol-2-yl]-3-hetarylacrylonitriles by recyclizations of 2,6-diamino-4-hetaryl-4H-thiopyran-3,5-dicarbonitriles with α-bromoketones

“…Further developing our previous studies on the chemistry 4H-thiopyrans [13][14][15][16], here we report on the recyclization of substituted 2,6-diamino-4-[2-furyl-(thienyl)]-4Н-thiopyran-3,5-dicarbonitriles Ia-Ic with α-bromoketones IIa-IIo in boiling 2-propanol in the presence of triethylamine.…”