The liquid phase oxidation of ethylbenzene catalyzed by metal phthalocyanine(CoPc, MnPC, FePc) was investigated at an atmospheric pressure of oxygen at 100 ℃. The catalytic activity of CoPc is higher than that of MnP...The liquid phase oxidation of ethylbenzene catalyzed by metal phthalocyanine(CoPc, MnPC, FePc) was investigated at an atmospheric pressure of oxygen at 100 ℃. The catalytic activity of CoPc is higher than that of MnPc and FePc. The addition of catalytic amount of K\-2Cr\-2O\-7, MnO\-2 or V\-2O\-5 to the catalytic system can lead to a remarkable increase in the catalytic activity or acetophenone selectivity, compared with those of the metal phthalocyanine and catalytic amount of K\-2Cr\-2O\-7, MnO\-2 or V\-2O\-5 used alone.展开更多
The lanthanum molybdovanadophosphoric tetrabasic heteropoly complex was synthesized.Catalytic properties of the title heteropoly complex for selective oxidation of ethylbezene to acetonphenone was investigated.The sui...The lanthanum molybdovanadophosphoric tetrabasic heteropoly complex was synthesized.Catalytic properties of the title heteropoly complex for selective oxidation of ethylbezene to acetonphenone was investigated.The suitable reaction conditions was discussed.展开更多
Two new aromatic β-diketones,1-phenyl-3-（6methoxy-1-naphthyl）propane-1,3-dione（a） and 1-（4-tert-butylphenyl）-3-（6-methoxy-1-naphthyl）propane-1,3-dione（b） were synthesized from aromatic ketone and ester by c...Two new aromatic β-diketones,1-phenyl-3-（6methoxy-1-naphthyl）propane-1,3-dione（a） and 1-（4-tert-butylphenyl）-3-（6-methoxy-1-naphthyl）propane-1,3-dione（b） were synthesized from aromatic ketone and ester by classical Claisen condensation using NaNH2 as strong base.And their structures were determined by means of UV,IR,1H NMR spectra and elemental analysis.The results show that two β-diketone compounds have strong ultraviolet absorption and exist in the enol form in chloroform solvent.展开更多
N-glycinylmaleamic acid(GMA) was synthesized by using maleic anhydride and glycine.Five synthesis methods for N-glycinylmaleimide(GMI)were compared.Among them the method using triethylamine to dehydrate was found to b...N-glycinylmaleamic acid(GMA) was synthesized by using maleic anhydride and glycine.Five synthesis methods for N-glycinylmaleimide(GMI)were compared.Among them the method using triethylamine to dehydrate was found to be the best.Their structures were confirmed by fourier transform infrared spectroscopy(FTIR) and nuclear magnetic resonance spectrum(HNMR).展开更多
The selective bromination of paeonol (4-methoxy-2-hydroxyacetophenone) has been studied as function of solvents(methanol, ethanol, chloroform-ethyl acetate), reaction time, temperature and the mole ratio of reagents. ...The selective bromination of paeonol (4-methoxy-2-hydroxyacetophenone) has been studied as function of solvents(methanol, ethanol, chloroform-ethyl acetate), reaction time, temperature and the mole ratio of reagents. The higher yield was obtained in polar solvents than in non-polar ones. The best solvent appeared methanol, and the mixtures of polar solvents were better than any single of them, except methanol. Paeonol and cupric bromide in mole ratio of 1∶2 in methanol under reflux temperature for five hours gave a bromination product in yield of 63.3%.展开更多
文摘The liquid phase oxidation of ethylbenzene catalyzed by metal phthalocyanine(CoPc, MnPC, FePc) was investigated at an atmospheric pressure of oxygen at 100 ℃. The catalytic activity of CoPc is higher than that of MnPc and FePc. The addition of catalytic amount of K\-2Cr\-2O\-7, MnO\-2 or V\-2O\-5 to the catalytic system can lead to a remarkable increase in the catalytic activity or acetophenone selectivity, compared with those of the metal phthalocyanine and catalytic amount of K\-2Cr\-2O\-7, MnO\-2 or V\-2O\-5 used alone.
文摘The lanthanum molybdovanadophosphoric tetrabasic heteropoly complex was synthesized.Catalytic properties of the title heteropoly complex for selective oxidation of ethylbezene to acetonphenone was investigated.The suitable reaction conditions was discussed.
文摘Two new aromatic β-diketones,1-phenyl-3-（6methoxy-1-naphthyl）propane-1,3-dione（a） and 1-（4-tert-butylphenyl）-3-（6-methoxy-1-naphthyl）propane-1,3-dione（b） were synthesized from aromatic ketone and ester by classical Claisen condensation using NaNH2 as strong base.And their structures were determined by means of UV,IR,1H NMR spectra and elemental analysis.The results show that two β-diketone compounds have strong ultraviolet absorption and exist in the enol form in chloroform solvent.
文摘N-glycinylmaleamic acid(GMA) was synthesized by using maleic anhydride and glycine.Five synthesis methods for N-glycinylmaleimide(GMI)were compared.Among them the method using triethylamine to dehydrate was found to be the best.Their structures were confirmed by fourier transform infrared spectroscopy(FTIR) and nuclear magnetic resonance spectrum(HNMR).
文摘The selective bromination of paeonol (4-methoxy-2-hydroxyacetophenone) has been studied as function of solvents(methanol, ethanol, chloroform-ethyl acetate), reaction time, temperature and the mole ratio of reagents. The higher yield was obtained in polar solvents than in non-polar ones. The best solvent appeared methanol, and the mixtures of polar solvents were better than any single of them, except methanol. Paeonol and cupric bromide in mole ratio of 1∶2 in methanol under reflux temperature for five hours gave a bromination product in yield of 63.3%.
