Synthesis of Pyrazoles by a One-Pot Tandem Cyclization-Dehydrogenation Approach on Pd/C/K-10 CatalystSynlett (2007)
A novel one-pot synthesis of substituted pyrazoles from chalcones and hydrazines via a tandem cyclization-dehydrogenation approach is described. This process is based on the use of a bifunctional noble-metal/solid-acid catalyst, Pd/C/K-10 montmorillonite and microwave irradiation under solvent-free conditions. The cyclization of chalcones with hydrazines readily takes place on the strong solid acid while the presence of the metal ensures the formation of the aromatic product through dehydrogenation. The reactions are complete in 30 minutes providing good yields and high selectivities.
- Bifunctional catalysis,
- Microwave heating,
Publication DateMarch, 2007
Citation InformationShainaz M. Landge, Allison Schmidt, Verona M. Outerbridge and Béla Török. "Synthesis of Pyrazoles by a One-Pot Tandem Cyclization-Dehydrogenation Approach on Pd/C/K-10 Catalyst" Synlett Vol. 10 (2007) p. 1600 - 1604
Available at: http://works.bepress.com/shainaz_landge/44/