Molecules p. 9340 - 9356 (2011)
Update date:2022-08-02
Topics:
Levi, Lucilla
Boersch, Christina
Gers, Charlotte F.
Merkul, Eugen
Mueller, Thomas J. J.
A novel consecutive three-component synthesis of 3-(hetero)aryl-1H- pyrazoles via room temperature Sonogashira arylation of propynal diethylacetal used as a propargyl aldehyde synthetic equivalent has been disclosed. The final acetal cleavage-cyclocondensation with hydrazine hydrochloride at 80 °C rapidly furnishes the title compounds in a one-pot fashion.
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