Quinones could be formed as side products in the reaction mixture. For catechol, biodegradation transformation is about ten time s faster than for phenol . Highly selective nitration of phenol and substituted phenols to the corresponding nitro compounds is accomplished under mild conditions in a liquid−liquid two-phase system with dilute nitric acid (6 wt %) and in the presence of a phase-transfer catalyst. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
The results of this investigation show that the conversion of catechols to their nitro derivatives takes place at very mild conditions; in the absence of any oxidative agent or photoinduced driving force. 15 catechol , which are known pollutants, by one of the most active strains selected during our previous screening in clouds (Rhodococcus enclensis ). Therefore, an original experimental approach is applied to unequivocally resolve the role of quinone intermediate in the naturally relevant nitration of catechol. the catechol nitration. Pages 525-533. Volume 18, Issue 4. Peroxynitrite-induced nitration of tyrosine hydroxylase: Identification of tyrosines 423, 428, and 432 as sites of modification by matrix-assisted laser desorption ionization time-of-flight mass spectrometry and tyrosine-scanning mutagenesis. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Electrochemical nitration of catechols has been studied in the presence of nitrite ion as nucleophile in aqueous solution, by means of cyclic voltammetry and controlled-potential coulometry. Hydroquinone could scavenge nitrite through both nitration and nitrosation mechanisms.
nitration method phenolic compounds phenolic compounds Prior art date 2001-07-25 Legal status (The legal status is an assumption and is not a legal conclusion. nitration method phenolic compounds phenolic compounds Prior art date 2001-07-25 Legal status (The legal status is an assumption and is not a legal conclusion. Microperoxidase 8 (MP8) is obtained by hydrolytic digestion of cytochrome c[[]].MP8 contains the heme prosthetic group together with amino‐acid residues 14–21 of horse cytochrome c, including His18, whose imidazole group acts as the fifth axial ligand of the iron.At pH lower than 9, the sixth coordination position of the iron is occupied by a water molecule. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) So Electrochemical nitration of catechols has been studied in the presence of nitrite ion as nucleophile in aqueous solution, by means of cyclic voltammetry and controlled-potential coulometry.
nitration phenolic compounds ortho nitro Prior art date 2001-07-25 Application number MXPA04000771A Other languages Spanish (es) Inventor Alexander Learmonth David Original Assignee Portela & Ca Sa Priority date (The priority date is an assumption and is not a legal conclusion. It is shown that both reactions are drastically depends on pH and nitrous acid or nitrite ion percentage.