金属卟啉及其复合催化体系催化氧化邻硝基乙苯制备α-邻硝基苯乙醇

Synthesis of 1-( 2-Nitrophenyl) ethanol Prepared from the Aerobic Oxidation of O-Nitroethylbenzene Catalyzed by Metalloporphyrins

研究了以邻硝基乙苯为原料、以金属卟啉及其复合催化体系为催化剂制备α-邻硝基苯乙醇的方法。结果表明,催化剂用量1.0×10-6mol、反应温度130℃、反应时间3 h为最优反应条件。在该条件下,所有金属卟啉及金属卟啉-金属卟啉复合催化剂对上述反应均具有催化活性,且催化活性有明显的差异。其中,氯化四-(对甲基苯基)锰卟啉与氯化四-(对硝基苯基)锰卟啉复合催化剂的效果最好,邻硝基乙苯的转化率提高到25.1%,α-邻硝基苯乙醇的选择性达49.6%,且金属卟啉催化剂之间具有明显的协同作用。

The catalytic performances of metalloporphyrins and its compounding catalytic systems in the aerobic oxidation of o-nitroethylbenzene to 1-（ 2-nitrophenyl） ethanol has been investigated with solvent-free system at atmospheric pressure. Results showed that adopt 1. 0 × 10- 6mol as catalyst amount,130 ℃ as reaction temperature and 3 h as reaction time should be the optimum reaction conditions. All of the metalloporphyrins and its compounding catalytic system had catalytic performances,and the catalytic performances of different metalloporphyrins or compounding catalytic systems were obviously diverse. T（ p-CH3） PPMn ClT（ p-NO2） PPMn Cl is served as the best compounding catalytic system in the oxidation of o-nitroethylbenzene,the conversion of o-nitroethylbenze increases to 25. 1%,the selectivity for 1-（ 2-nitrophenyl） ethanol reaches 49. 6%. The synergistic effects of metalloporphyrins is obvious in this reaction.