The use of anilinodihydrofurans in the synthesis of novel heterocyclic compounds

Alkyl 4-oxo-2-phenylamino-4,5-dihydrofuran-3-carboxylates were used for the preparation of alkyl 5-amino-7-aryl-2-{[aryl(hydroxy)meuiyl](phenyl)amino}-4,6- dicyano-1 -benzofuran-3-carboxylates, 4-oxo-2-phenylamino-N-(p-tolyl)-4,5- dihydrofuran-3-carboxamide, and ethyl 4-chloro-5-formyl-2-(phenylamino)furan-3- carboxylate. The latter was used for the synthesis of ethyl 4-chloro-5- (hydrazinylidenemethyl)-2-(phenyl-amino)furan-3-carboxylate and diethyl 5,5'-(hydrazine-l,2-diylidenemethylylidene)-bis[4-chloro-2-(phenylamino) furan-3-carboxylate].