Microwave-assisted synthesis of 2-(4,5-dihydro- 5-(tetrazolo[1,5-a] quinoline-4-yl)-1H-pyrazol-3-yl)- Substituted phenols

Abstract

A series of pyrazolines 4a-h has been synthesized by Michael addition of chalcones 3a-h with hydrazine hydrate in the presence of sodium acetate under conventional heating or microwave irradiation. Structures of the newly synthesized pyrazolines 4a-h have been established on the basis of IR, 1H, 13C NMR and mass spectral data.