The N-alkylation and N-arylation of unsymmetrical pyrazoles was written by Grimmett, M. Ross;Lim, K. H. Richard;Weavers, Rex T.. And the article was included in Australian Journal of Chemistry in 1979.Name: 3-(4-Bromophenyl)-1H-pyrazole This article mentions the following:
Unsym. pyrazoles with alkyl, aryl, nitro and carboxyl substituents at C-3 or C-5 were methylated with Me2SO4-MeOH, Me2SO2 in basic medium, and with CH2N2. The ratios of the isomeric N-methylpyrazoles were determined by NMR and gas liquid chromatog. The modified Ullmann phenylation was also applied to these pyrazoles. Product orientations involve considerations of electronic and steric effects, the possible intermediacy of quaternary salts, and the likelihood that the dominant tautomer is reacting. In the experiment, the researchers used many compounds, for example, 3-(4-Bromophenyl)-1H-pyrazole (cas: 73387-46-9Name: 3-(4-Bromophenyl)-1H-pyrazole).
3-(4-Bromophenyl)-1H-pyrazole (cas: 73387-46-9) belongs to pyrazole derivatives. Pyrazole has two ring nitrogen atoms in which N1 is pyrrolic and N2 is pyridine-like. The N1 nitrogen is not reactive but is deprotonated in the presence of a base-forming anion. Pyrazoles are commonly used scaffold molecules in drug discovery projects. The use of pyrazole derivatives is based on their analgesic, anti-inflammatory, antipyretic, antiarrhythmic, sedative, muscle relaxant, neuroleptic, anticonvulsant, monoamine oxidase inhibitory, antidiabetic and antibacterial activities.Name: 3-(4-Bromophenyl)-1H-pyrazole
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics