4-羧基-NHPI与草酰胺Co(Ⅱ)配合物协同氧化乙苯

Aerobic Oxidation of Phenylethane Using a Combination of 4-carboxyl-N-Hydroxyphthalimide and Oxamide Cobalt(Ⅱ)

合成催化剂4-羧基-N-羟基邻苯二甲酰亚胺(4-羧基-NHPI)和草酰胺Co(Ⅱ)配合物,并以分子氧为氧源,研究其协同催化氧化乙苯的性能,结果表明,当反应温度为100℃,氧压力为0.3 MPa,反应时间为10 h时,乙苯的转化率达到了95.7%,苯乙酮、1-苯乙醇和1-苯基过氧化氢的选择性分别为90.5%、3.2%和6.6%。与传统的NHPI/醋酸钴体系相比,有了很大的提高,展示了很好的应用前景。

4 - carboxyl - N - Hydroxyphthalimide was synthesized and combined with oxamide cobalt （ Ⅱ ） complex in the phenylethane oxidation by oxygen molecule. It was suggested that when the reaction temperature was 100 ℃, the pressui＇e of the oxygen 0.3 MPa,and reaction time 10 h,the conversion of phenylethane reached 95.7% and the selectivity of hypnone, 1 - phenyl ethanol and 1 - phenyl hydrogen peroxide reached 90. 5% ,3.2% and 6.6% , respectively. Compared with NHPI/Co （OAc）2 catalytic system,they all improved markedly. Using this catalytic system, the oxidation reactions proceed under mild conditions and give high conversions and selectivity.