Patil, Dayanand published the artcileNovel crown ether functionalized imidazolium-based acidic ionic liquid catalyzed synthesis of pyrazole derivatives under solvent-free conditions, Related Products of pyrazoles-derivatives, the publication is Research on Chemical Intermediates (2015), 41(9), 6843-6858, database is CAplus.
An innovative designed novel crown ether functionalized imidazolium-based reusable acidic ionic liquid [crown ether MIm] [HSO4] has been efficiently implemented for the synthesis of pyrazole derivatives using various substituted enaminones, hydrazine hydrate and Ph hydrazine under solvent-free conditions. Structural novelty and task efficiency of the catalyst, high yields of desired products, greener approach attributing high atom economy (green chem. method) and solvent-free conditions render this protocol suitable to cope with the current demand in contemporary organic chem. The inventive idea of utilizing crown ether functionalized ionic liquid as a catalyst was for the first time demonstrated in this protocol. The synthesis of the target compounds was achieved using [6-[1,4,7,10,13-benzopentaoxacyclopentadecin-15-yl]hexyl]imidazolium sulfate as a catalyst. Starting materials included hydrazine, phenylhydrazine and enaminone derivatives [(amino)alkenone derivatives] such as 3-(dimethylamino)-1-phenyl-2-propen-2-one, 3-(dimethylamino)-1-(2-furanyl)-2-propen -1-one, 2-[(dimethylamino)methylene]-1,3-cyclohexanedione. The title compounds thus formed included pyrazole derivatives and analogs, such as 3-phenyl-1H-pyrazole, 3-(2-furanyl)-1H-pyrazole, 1,5,6,7-tetrahydro-4H-indazol-4-one (indazole derivatives).
Research on Chemical Intermediates published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, Related Products of pyrazoles-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics