Synthesis and Characterization of 4-Aroyl Substituted Pyrazoline

摘要

New 4-aroyl substituted pyrozoline(II)have been synthesized by the condensation of Ph centre dot NH-NH_2 centre dot HC1 with 3-aroyl flavanone(I)in DMF containing small amount of piperidine.Structure of the compound has been characterized by melting point,TLC,IR and PMR spectra.Flavanones are reported to react with hydrazines to yield pyrazolines and its reaction mechanism has also been explained.Pyrazolines are found in drugs and dyes.The present,work deals with the synthesis of new substituted 3,5-diaryl-4-aroyl substituted pyrazoIine(II)in DMF medium containing a little piperidine.