Studies on absorption spectra of newly synthesized cyanine dyes was written by Abu El-Hamd, Ragab M.. And the article was included in Indian Journal of Heterocyclic Chemistry in 1996.Application In Synthesis of 4-Bromo-3-methyl-1H-pyrazol-5(4H)-one This article mentions the following:
New asym. monomethine cyanines (I; R = H, Ph; X = NH, CH2; A = H, C4H4; Z = H, C4H4), trimethine cyanines (II; X = NH, CH2; A = H, C4H4; Z = H, C4H4), and styryl cyanines (III; R = H, OMe, NO2; X = NH, CH2; A = H, C4H4) were synthesized to study their spectral behavior, solvatochromism, mixed solvents and acid-base properties. These dyes are characterized by elemental anal., IR, 1H NMR, and electronic absorption spectra. In the experiment, the researchers used many compounds, for example, 4-Bromo-3-methyl-1H-pyrazol-5(4H)-one (cas: 51395-52-9Application In Synthesis of 4-Bromo-3-methyl-1H-pyrazol-5(4H)-one).
4-Bromo-3-methyl-1H-pyrazol-5(4H)-one (cas: 51395-52-9) belongs to pyrazole derivatives. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugated acid 2.49 at 25 °C).Pyrazole used as a ligand to prepare organometallic compounds. 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.Application In Synthesis of 4-Bromo-3-methyl-1H-pyrazol-5(4H)-one
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics