13789-06-5Relevant academic research and scientific papers
Regioselective synthesis of 1,3,5-trisubstituted pyrazoles
Desai, Vidya G.,Satardekar, Pooja C.,Polo, Sampada,Dhumaskar, Kashinath
experimental part, p. 836 - 842 (2012/01/15)
A new and a simple approach toward synthesis of 1,3,5-trisubstituted pyrazoles from chalcone arylhydrazones via oxidative cyclization has been achieved. 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone was successfully used as an oxidizing agent to give excellen
Layered zirconium sulfophenyl phosphonate as heterogeneous catalyst in the synthesis of pyrazoles and 4,5,6,7-tetrahydro-1(2)H-indazoles
Curini, Massimo,Rosati, Ornelio,Campagna, Valerio,Montanari, Francesca,Cravotto, Giancarlo,Boccalini, Mauro
, p. 2927 - 2930 (2007/10/03)
Pyrazoles and tetrahydroindazoles may be prepared by condensation of 1,3-diones and hydrazines under layered zirconium sulfophenyl phosphonate catalysis, in solvent-free conditions. Georg Thieme Verlag Stuttgart.
Oxidative Cyclization of Arylhydrazones of Chalcones and Benzalacetones to Pyrazoles by Thianthrene Cation Radical
Kovelesky, Albert C.,Shine, Henry J.
, p. 1973 - 1979 (2007/10/02)
Phenyl-, (p-nitrophenyl)-, and (2,4-dinitrophenyl)hydrazones of chalcone (benzalacetophenone), benzalacetone, and of some of their derivatives undergo oxidative cyclization in reactions with thianthrene cation radical perchlorate.The products are, respect
