- A process for the preparation method of the compound aromatic amines (by machine translation)
-
The invention discloses a method for preparing aromatic amine compounds, comprising the following steps: under protection of inert gas, with the ratio of the phenolic compound amine according to mole 1:2 - 40 are mixed and dissolved in the solvent, 50 - 140 °C reaction 6 - 15 hours, corresponding to preparing polymerizable aromatic amine compound, and then after treatment to obtain a pure aromatic amine compound. Raw materials of this invention generally are easy, simple operation, substrate and wide range of application, in the absence of catalyst under catalytic conditions of the phenolic compound can be obtained by nucleophilic addition reaction of the corresponding aromatic amine compound, and is suitable for industrial production. The present invention allows the presence of water in the reaction system, can be ammonia or hydrazine hydrate as the substrate, in order to ammonium chloride as a catalyst and a cosolvent, the success of the preparation to obtain a level from phenol hydroxy aromatic primary amino compound. The invention to phenol hydroxy has better selectivity, even if the presence of halogen atoms in the substrate does not affect the occurrence of the reaction. (by machine translation)
- -
-
Paragraph 0119; 0120; 0121; 0122
(2017/07/18)
-
- Mechanism and reactivity in perborate oxidation of anilines in acetic acid
-
Perborate but not percarbonate in acetic acid generates peracetic acid on standing and the peracetic acid oxidation of anilines is fast. The oxidation with a fresh solution of perborate in acetic acid is smooth and second order but the specific oxidation rate increases with increasing [perborate]0 or [boric acid]. Perborate on dissolution affords hydrogen peroxide and a borate; the latter assists the former in the oxidation. The oxidation rates of anilines under identical conditions do not conform to any of the linear free energy relationships but the reaction rates of molecular anilines do. Perborate oxidation proceeds via two reaction paths but the overall oxidation rates of molecular anilines conform to structure reactivity relationships; the transition states do not differ significantly. Analysis of the oxidation rates of perborate and percarbonate reveals that while perborate oxidation is faster than percarbonate it is at least as selective as the latter.
- Karunakaran, Chockalingam,Kamalam, Ramasamy
-
p. 2011 - 2018
(2007/10/03)
-
- Time-resolved infrared spectroscopy of intermediates and products from photolysis of 1-(2-nitrophenyl)ethyl phosphates: Reaction of the 2- nitrosoacetophenone byproduct with thiols
-
Rapid scan Fourier transform infrared (FTIR) spectroscopy and time- resolved single wavelength infrared (IR) spectroscopy have been applied to study the mechanism of photochemical release of adenosine 5'-triphosphate (ATP) from its P3-[1-(2-nitrophenyl)ethyl] ester (caged ATP). Bands arising from phosphate and non-phosphate vibrations characteristic of the aci-nitro anion intermediate and from free ATP and hyproducts of the nitrophenylethyl group have been assigned using 13C, 15N, and 18O isotopomers of caged ATP. Monitoring several of these bands using time-resolved single frequency IR spectroscopy confirms that release of ATP occurs in a single exponential process synchronous with the decay of the aci-nitro anion intermediate. Spectral characteristics of the reaction products arising from the l-(2- nitrophenyl)ethyl group in the absence and presence of dithiothreitol (DTT) have been determined. The major final byproduct from photolysis conducted in the presence of DTT is 3-methylanthranil. The mechanism of formation of this compound from 2-nitrosoacetophenone has been investigated in detail by a combination of spectroscopic, kinetic, and chemical methods and reconciled with earlier data. The byproduct species likely to be present on the time scale of most biological experiments using caged compounds is 2- hydroxylaminoacetophenone as a mixture of ring-chain tautomers.
- Barth, Andreas,Corrie, John E. T.,Gradwell, Michael J.,Maeda, Yashusi,M?ntele, Werner,Meier, Tanja,Trentham, David R.
-
p. 4149 - 4159
(2007/10/03)
-
- Polarographic Behaviour of Some ortho-Substituted Nitrobenzenes: Evaluation of Polarographic ortho-Shift
-
The polarographic characteristics of thirteen ortho-substituted nitrobenzenes have been studied at 35 deg C +/- 0.1 deg C in a well-buffered medium of 50percent (v/v) aqueous ethanol, having pH 5.8.Reduction process for all the compounds is found to be ir
- Ganapathy, K,Ramanujam, M
-
p. 1087 - 1089
(2007/10/02)
-