Abstract
Synthesis of benzopyrano[2,3-c]pyrazoles and 3-triazolonyliminocoumarins was successfully performed using heterocyclization of 3-cyano iminocoumarin or their N-ethoxycarbonylated derivatives with semicarbazide reagents. Elemental analysis, infrared, and 1H NMR spectral data confirmed the molecular structure of the newly synthesized compounds.
GRAPHICAL ABSTRACT
ACKNOWLEDGMENTS
The authors acknowledge Pr. Rachid El Gharbi for his useful discussions about this work.
Notes
a Isolated yield.
a Isolated yield.