Return to Article Details 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 Download Download PDF