Synthesis and spectral studies of some new pyrazolines and pyrazoles

ABSTRACT

A number of 3' -[3-aryl-2-methyl] pyrrol-5-yll-l' - aryl-2 propen-l'-ones 4-13 have been prepared and transformed into the corresponding arylhydrazones 14-28. These hydrazones were cyclized to the pyrazolines 29-43, which were oxidized to the corresponding pyrazoles 49-53. In addition, heating of the pyrazoline 42 with hydrazine hydrate afforded the hydrazide 46 while pyrazolines 41 and 42 gave the acids 47 and 48 upon hydrolysis. Spectral properties of the prepared compounds were discussed