Mn(III)-saloph室温高效催化氧化仲醇的反应研究

Highly Efficient Oxidation of Secondary Alcohol Catalyzed by Mn(III)-saloph at Ambient Temperature

以saloph为配体 ,醋酸碘苯 [PhI(OAc) 2 ]为氧源 ,考察了Mn等不同中心金属离子的配合物和不同溶剂对α 苯乙醇催化氧化反应的影响 ,同时又考察了不同取代基的水杨醛制备的配体所形成的锰配合物 2a～ 2g的催化氧化性能和不同底物在优化条件下的反应情况 .结果表明 ,锰配合物 2e在乙腈溶剂中催化性能最佳 .

The oxidation of sec-alcohols with iodobenzene diacetate using a series of metalsaloph (saloph=salicylaldehyde-o-phenylenediimine) complexes as catalysts has been studied at ambient temperature. Firstly it was found that manganese complexes have excellent catalytic activity in the catalytic oxidation of α-methylbenzyl alcohol. Then the effect of different manganesesaloph complexes 2a～2g and the effect of different solvents were respectively investigated on the oxidation of α-methylbenzyl alcohol. Finally the investigation was extended to oxidation of different aromatic and aliphatic sec-alcohols under those optimized conditions. The best results were obtained when complex 2e catalyzed oxidation of α-methylbenzyl alcohol and pinacoline in acetonitrile for 1 h.