MICROWAVE ASSISTED SOLVENT-FREE SYNTHESIS OF PYRAZOLO (4,3-C) QUINOLINES USING MONTMORILLONITE K-10 CLAY: AN ENVIRONMENTAL BENIGN APPROACH

A series of novel pyrazolo(4,3-c)quinolines have been synthesized in good to excellent yields by environmental benign solvent free microwave -induced technique involving condensation of ethyl-4-chloroquinoline-3-carboxylates 5 (a-d) with different hydrazines using montmorillonite K-10 clay as a catalyst. All new compounds were characterized by spectral and analytical methods.