1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Application In Synthesis of 1-Methyl-4-nitroimidazole
Mechanisms of N-substitution in glyoxaline derivatives. I. Introduction, and study of prototropic equilibria involving 4(5)-nitroglyoxaline was written by Grimison, A.;Ridd, J. H.;Smith, B. V.. And the article was included in Journal of the Chemical Society in 1960.Application In Synthesis of 1-Methyl-4-nitroimidazole This article mentions the following:
The orientation of N-substitution in glyoxaline derivatives was discussed in terms of the reaction mechanism and the tautomeric equilibria involved. A spectrometric study of acid-base equilibria in aqueous solutions of 4(5)-nitroglyoxaline (I) and its N-Me derivatives was reported. The basicity of the 1,5-methyl derivative (II) was greater than that of I, but the basicity of the 1,4-isomer (III) was less; these results were related to the position of tautomeric equilibrium in the parent compound A small ionic strength correction was made to obtain the thermodynamic pK values as follows (compound, medium, form, 位 max in m渭, 10-3蔚, and pK values given): I, 0.1M NaOH, conjugate base, 350, 10.19, -; I, buffer pH 4.7, neutral molecule, 297, 6.40, 9.30; I, 5M HClO4, conjugate acid, 269, 7.04, -0.05; II, H2O, neutral, 303, 8.37, -; II, M HClO4, conjugate acid, 266, 6.42, 2.13; III, H2O, neutral, 300, 7.27, -; III, 5M HClO4, conjugate acid, 269, 7.16, -0.53. The following indicator values were obtained based on optical ds. at 300 and 310 m渭. The spectra of the neutral mols. and the conjugate acids used in these calculations were obtained in the above conditions. A small correction was applied to the spectrum of III in 5M HClO4, because about 2% of the neutral molecule should then be present. The protonation of I and III in mineral acids gave the following values (molarity of acid and the log ([GH2+]/[GH]) for I in HClO4, in HCl, for III in HClO4, in HCl given): 0.25, -0.63, -, -1.02, -; 0.50, -0.25, -, -0.69, -0.75; 0.75, -0.05, -, -0.40, -0.54; 1.0, 0.18, 0.02, -0.23, -0.40; 1.3, 0.30, 0.13, -0.04, -; 1.5, 0.44, 0.24, -, 0.09; 1.6, -, -, -0.12, -; 2.0, 0.74, 0.43, 0.34, 0.08; 2.5, 0.90, 0.67, 0.53, 0.25; 3.0, 1.20, -, 0.75, 0.40. The S脢2′ mechanism appeared to occur much more readily than the S脢2 mechanism for substitution in derivatives of glyoxaline. For substitution in a glyoxaline derivative, it was easy to show that the orientation depended on the mechanism involved. The neutral mol. of I existed in solution as an equilibrium mixture of 2 tautomeric forms, both of which could lose or add a proton to form the common conjugate acid and conjugate base. The pK was determined by plotting log ([GH2+]/[GH])-log-[H+] against the molarity of the acid and extrapolating to zero concentration The linear extrapolation to obtain the pK was given in a figure. The basicity of the N-methylnitroglyoxalines was studied. III was a little less basic than I. The protonation was followed in the same way II was much more basic than I and the equilibrium was studied in buffer solutions The extent to which the protonation of substituted glyoxalines followed the acidity function H0 was of interest because glyoxalines were very different in structure from the aniline derivatives used in estimating the H0 scale. Some values were given above for I and III. From such comparisons it seemed that the protonation of I followed H0 in HClO4, but deviated appreciably from H0 in HCl. In both acids the protonation of III increased more rapidly with acidity than did I. In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Application In Synthesis of 1-Methyl-4-nitroimidazole).
1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. Imidazole derivatives generally have good solubility in protic solvents. Simple imidazole derivatives, such as 1H-imidazole, 2-methyl-1H-imidazole, and 1,2-dimethylimidazole, have very high solubility in water. The pharmacophore of imidazole exists in bioactive compounds including amino acids, plant growth regulators and therapeutic agents.n increase of the alkyl chain length of the alcohols. Application In Synthesis of 1-Methyl-4-nitroimidazole
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem