16713-37-4Relevant academic research and scientific papers
Regioselective synthesis of 4-nitro- or 4-chloro-tetrasubstituted pyrazoles from hydrazones and β-halo-β-nitrostyrenes
Deng, Xiaohu,Liang, Jimmy T.,Mani, Neelakandha S.
, p. 410 - 417 (2014/01/23)
We report an acid-catalyzed cycloaddition reaction of hydrazones with β-bromo- or β-chloro-β-nitrostyrenes for the regioselective synthesis of 4-nitro- or 4-chloro-tetrasubstituted pyrazoles. Arising from a common 4-halo-4-nitropyrazolidine intermediate,
1-Methyl(or phenyl)-5-(penta-O-acetyl-D-galacto-penitol-1-yl)pyrazoles from the reactions of 3,4,5,6,7-penta-O-acetyl-1,2-dideoxy-1-nitro-D-galacto-hept-1-enitol with aldehyde methyl(or phenyl)hydrazones
Gomez-Guillen, Manuel,Simon, Jose Maria Lassaletta
, p. 175 - 189 (2007/10/02)
The title hept-1-enitol (2) reacted with aldehyde methyl(or phenyl)hydrazones in refluxing methanol or butyl acetate to give 1-methyl(or phenyl)-5-(penta-O-acetyl-D-galcto-pentitol-1-yl)pyrazoles in good (for 1-methylpyrazoles) or moderate yields (for 1-p
