Synthesis of pyrazoles through catalyst-free cycloaddition of diazo compounds to alkynes

This is the authors' abstract. We don't add key points for this paper.

The synthesis of pyrazoles via1,3-dipolar cycloaddition of diazo compounds to alkynes proceeds easily by heating. With α-diazocarbonyl substrates the reactions are conducted under solvent-free conditions affording the pyrazole products in high yields without any work up or purification.