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Chinese Journal of Structural Chemistry 2018年第12期37卷 1869-1877,1843页

作者： ZHANG Fu-Lan College of Chemistry and Chemical Engineering Yangtze Normal University

The reaction mechanism of o-aminophenol, acetic acid and phosphorus oxytrichloride in one-pot to form 2-methyl benzoxazole was studied by density functional theory. The geometries of the reactants, transition states, intermediates and products were optimized at the GGA/PW91/DNP level. Vibration analysis was carried out to confirm the transition state structure. Two possible reaction pathways were investigated in this study. The result indicates that the reaction Re→TS1→IM1→TSA2→IMA2→TSA3→IMA3→TSA4→IMA4→TSA5→P2 is the main pathway, the activation energy of which is the lowest. Re→TS1→IM1 is the rate-limiting step, with the activation energy being 221.54 kJ·mol^(-1) and the reaction heat being 10.06 kJ·mol^(-1). The dominant product predicted theoretically is in agreement with the experiment results.

关键词： o-aminophenol acetic acid phosphorus oxytrichloride 2-methyl benzoxazole density functional reaction mechanism

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Reactive Extraction of o-aminophenol Using Trialkylphosphine oxide

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Chinese Journal of Chemical Engineering 2006年第1期14卷 46-50页

作者：李德亮刘小强崔节虎 Chemistry and Chemical Engineering College Henan University Kaifeng 475001 China

Extraction of o-aminophenol (oAP) using trialkylphosphine oxide (TRPo) was studied with different diluents. The neutral oAP was extracted using TRPo under an equilibrium pH in the range of 6—7.5, and a maximum distribution coefficient occurred. It was confirmed that the pH value and the TRPo concentration are the key factors that affect dis-tribution coefficient. Nonpolar diluents could provide better extraction distribution coefficient for the extraction of oAP and the order is: kerosene >n-octanol >chloroform.

关键词： reactive extraction o-aminophenol trialkylphosphine oxide diluent

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Enzyme-catalyzed reaction of voltammetric enzyme-linked immunoassay system based on oAP as substrate

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Science China Chemistry 1999年第2期42卷 195-203页

作者：张书圣陈洪渊焦奎 1. Department of Chemistry Nanjing University 210093 Nanjing China 2. Department of Applied Chemistry Qingdao Institute of Chemical Technology 266042 Qingdao China

Theo-aminophenol (oAP)-H2o2-horseradish peroxidase (HRP) voltammetric enzyme-linked immunoassay new system has extremely high sensitivity. HRP can be measured with a detection limit of 6.0×1010 g/L and a linear range of 1.0×10-9-4.0×10-6 g/L. The pure product of H2o2 oxidizing oAP catalyzed by HRP was prepared with chemical method. The enzyme-catalyzed reaction has been investigated with electroanalytical chemistry, UV/Vis spectrum, IR spectrum,13C NMR,1H NMR, mass spectrum, elemental analysis, etc. Under the selected enzyme-catalyzed reaction conditions, the oxidation product of oAP with H2o2 catalyzed by HRP is 2-aminophenoxazine-3-one. The processes of the enzyme-catalyzed reaction and the electroreduction of the product of the enzymecatalyzed reaction have been described.

关键词： o-aminophenol horseradish peroxidase voltammetry enzyme-catalysis electrochemical immunoassay.

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Fast Determination of Vitamin B<sub>2</sub>Based on Molecularly Imprinted Electrochemical Sensor

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Engineering（科研） 2012年第10期4卷 129-134页

作者： Peidong Xu Changsheng Qiao Shufeng Yang Lijuan Liu Mingwei Wang Juankun Zhang Key Laboratory of Industrial Microbiology Ministry of Education College of Bioengineering Tianjin Key Laboratory of Industry Microbiology College of Bioengineering Tianjin University of Science & Technology TUST Tianjin P.R.China

Under the condition of weak acidity of pH 5.2, a sensitive vitamin B2 electrochemical sensor based on molecularly imprinted nonconducting polymer of o-aminophenol by potentiostatic polymerization in the presence of template(vitamin B2) on a glassy carbon electrode was prepared, and its performance was studied. The sensor exhibited good sensitivity and selectivity to VB2. The detection limit went down to 2.3851nM, and a linear relationship between the current incremental and the concentration was found in the range of 10~120nM. And the sensor could use in detection of VB2 real sample for a long time and show good reproducibility. The average recovery rate to VB2 was 98.41%.

关键词： Vitamin B2 Molecularly Imprinted Technique Potentiostatic Polymerization o-aminophenol Drug Determination

Cooperative Br?nsted Acid/Titanocene Lewis Acid Catalyzed Reactions of Indoles

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Cooperative Br?nsted Acid/Titanocene Lewis Acid Catalyzed Re...

中国化学会第九届全国无机化学学术会议

作者： Xiu Wang Zhenhua Wang Huaming Sun Weiqiang Zhang Ziwei Gao Key Laboratory of Applied Surface and Colloid Chemistry MOESchool of Chemistry and Chemical EngineeringShaanxi Normal University

The Friedel–Crafts reaction represents the main thoroughfare by which C–C bonds are introduced on the indole *** and its derivatives are a class of metabolites distributing in flowering plants and continental or marine protozoa ***,few known catalyst system applied for tuning its selectivity to obtain single ***,a binary acid system has been developed that features an air-stable organometallic precursor,titanocene dichloride,and simple organic cooperative Bronsted acid,which allowed for mild and highly efficient Friedel-Crafts reactions of indoles and N-sulfonyl aldimines with excellent yield and satisfactory *** acids as co-ligands cordinated the selectivity,with the phenol as ligand the mono Friedel-Crafts products were selectively obtained in good yield,while the o-aminophenol provided selectively the bisindole in excellent yields.

关键词： cooperative catalysis organometallic Lewis acid phenol o-aminophenol indole

来源： cnki会议评论

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2-甲基苯骈噁唑的合成

江苏农学院学报 1986年第1期 13-14页

作者： The Research Group of Chemistry, Jiangsu Agricultural College 基础部化学组

2-甲基苯骈噁唑(2-methyl benzoxazole)为摄影用化学品以及有机合成中间体。我们在文献报道的基础上,选择了一条以邻氨基苯酚和乙酐为原料,经乙酰化、环合以及分离纯化等步骤的最简便合成法;产品经济效益显著,据用户反映质量可靠。

关键词： 2-methyl benzoxazole o-aminophenol