- A Practical Procedure for Regioselective Bromination of Anilines
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A highly practical procedure for the preparation of bromoanilines by using copper-catalyzed oxidative bromination has been developed. Treatment of free anilines with readily available NaBr and Na 2S 2O 8in the presence of a catalytic amount of CuSO 4·5H 2O enabled regioselective bromination.
- Takahashi, Yusuke,Seki, Masahiko
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p. 1828 - 1832
(2021/04/15)
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- Method of catalytically synthesizing polybromo-aniline in water phase
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The invention discloses a method of catalytically synthesizing polybromo-aniline in a water phase. The method comprises following steps: adding a catalytic amount of a free radical initiator, aniline derivatives, cheap and low-toxic bromine salts, and water into a reactor; carrying out reactions in a photocatalytic reaction instrument under power of 5W at a room temperature; after a while, extracting the reaction product by ethyl acetate, and carrying out recrystallization to obtain polybromo-aniline; wherein the free radical initiator is eosin, sodium persulfate, or potassium persulfate. The power of the incandescent lamp of the photocatalytic reaction instrument is 5W. The free radical initiator and bromine salts are cheap and easily available. The method is an ideal synthesis method of polybromo-aniline. Cheap and low-toxic bromine salts are used to replace liquid bromine. The cheap and easily available free radical initiator is used to replace unstable and explosive hydrogen peroxide. After 4 to 10 hours of reactions under the power of 5W, polybromo-aniline can be synthesized, the yield and the reaction selectivity are high, the byproducts are few, and the post treatment is simple.
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Paragraph 0012; 0021
(2019/10/04)
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- A kind of organic compound and its use this organic compound electroluminescent device
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The invention relates to an organic compound. The organic compound has a structure represented in a formula I, wherein R1, R2 and R3 are independently selected from hydrogen atom, substituted or non-substituted C1-C30 alkyl, substituted or non-substituted C1-C30 naphthenic base, substituted or non-substituted C1-C30 alkoxy, substituted or non-substituted C6-C30 aryl, substituted or non-substituted C6-C30 aryloxy, substituted or non-substituted C6-C30 arylamine, substituted or non-substituted C2-C30 heterocyclic ring, substituted or non-substituted C6-C30 condensed polycyclic group, hydroxyl, cyano group and substituted or non-substituted amino, respectively. Furthermore, the invention relates to an electroluminescent device, wherein the electroluminescent device comprises a hole injection layer and/or a hole transport layer using at least one of the compounds.
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Paragraph 0086-0089;0090
(2016/10/08)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light emitting compound represented by chemical formula 1, and an organic electroluminescent device comprising the same. The organic light emitting compound according to the present invention increases PL quantu
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Paragraph 0256-0260
(2016/10/08)
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- Polymer-supported organotin reagents for regioselective halogenation of aromatic amines
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(Chemical Equation Presented) Polymer-supported triorganotin halides were used in the halogenation reaction of aromatic amines. Treatment of aromatic amines with n-butyllithium and polymer-supported organotin halides gave the corresponding polymer-bound N-triorganostannylamines, which by treatment with bromine or iodine monochloride gave the para-halogenated aromatic amines with high yields and high selectivities. The polymer-supported organotin halides reagents regenerated during the course of the halogenation reaction can be reused without loss of efficiency. The presence of tin residues in halogenated aromatic amines was also investigated and evaluated at under 20 ppm after three runs.
- Chretien, Jean-Mathieu,Zammattio, Francoise,Le Grognec, Erwan,Paris, Michael,Cahingt, Blanche,Montavon, Gilles,Quintard, Jean-Paul
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p. 2870 - 2873
(2007/10/03)
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- EPR studies of nitrogen-centred free radicals. Part 53. Isolation, EPR spectra and magnetic characterization of N-(arylthio)-2,4-diaryl-6-cyanophenylaminyls
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N-(Arylthio)-2,4-diaryl-6-ethoxycarbonylphenylaminyls (1), N-[(2,4-dichlorophenyl)thio]-2,4-diphenyl-6-acetylphenylaminyl (2), N-(arylthio)-2,4-diaryl-6-cyanophenylaminyls (3), N-[(2,4-dichlorophenyl)thio]-2,4-bis(4-chlorophenyl)-6-fluorophenylaminyl (4) and N-[(4-nitrophenyl)thio]-2,4-diphenylphenylaminyl (5) were generated by oxidation of the corresponding N-(arylthio)anilines. Although 4 and 5 were short-lived and decayed in 30 min, 1-3 were quite persistent and 3 could be isolated as radical crystals. EPR spectra were measured for all radicals generated and the spin density distribution was evaluated. Ab initio MO calculations (the UHF Becke 3LYP/STO 6-31G) were performed, and a quantitative discussion on the spin density distribution was made. Magnetic susceptibility measurements were performed for three isolated radicals with a SQUID magnetometer. One radical was found to couple ferromagnetically, and analysis with the one-dimensional regular Heisenberg model gave 2J/kB = 11.2 K.
- Nakatsuji, Masaaki,Miura, Yozo,Teki, Yoshio
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p. 738 - 744
(2007/10/03)
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- Synthesis of 2,6-disubstituted and 2,3,6-trisubstituted anilines
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A number of 2,6-disubstituted and 2,3,6-trisubstituted anilines have been prepared via the selective para dehalogenation of the corresponding anilines. Modification of the substituents on the amino nitrogen demonstrates that the selectivity is derived from steric rather than electronic effects. The effects of the choice of formate hydrogen donor, Pd catalyst, solvent, and temperature upon the efficiency and selectivity of the dehalogenation are discussed.
- Pews,Hunter,Wehrmeyer
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p. 4809 - 4820
(2007/10/02)
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