Recyclization of 2-imino-2H-1-benzopyrans by the action of nucleophilic reagents 4. Use of 2-(N-aroylhydrazono)coumarin-3-carboxamides for the synthesis of 3-(1,3,4-oxadiazol-2-yl)coumarins
Recyclization of 2-imino-2h-1-benzopyrans under the influence of nucleophilic reagents. 1. New approach to the synthesis of 3-(1,3,4oxadi-, thiadi-, and triazolyl-2)coumarins