Synthesis of Pyrazoles and Bipyrazoles- a Review

The various methods of synthesizing pyrazole and bipyrazole moieties have always been a subject of interest for medicinal chemists. Primarily, the pyrazoles have been synthesized from diketones, hydrazones, acetylenes and more recently from chalcones. The bipyrazoles in turn have been derived from pyrazoles. The important methods of synthesis including the recent techniques have been reported in this review.