N,N'-二甲基乙二胺与TEMPO协同催化氧化醇

Oxidation of Alcohols by TEMPO and N,N'-Dimethylethylenediamine

建立由2,2,6,6-四甲基哌啶氮氧自由基(TEMPO)和CuBr2与N,N'-二甲基乙二胺组成的新催化体系,研究其选择性氧化醇的能力。经气相色谱检测,结果表明:该体系在无碱水溶液中,当反应温度为80℃,氧气压力为0.2 MPa,反应6h条件下,苯甲醛的转化率达到98.6%,选择性大于99%。

A novel catalytic system comprising of 2,2,6,6-tetramethylpiperidine-l-oxyl （TEMPO） radical, CuBr2 and ligand of N, N＇-Dimethylethylenediamine was investigated herein for its ability in the selective oxidation of alcohols. After gas chromatography detec- tion,it is shown that, without any external base,98.6% conversion and above 99% selectivity can be achieved in water under 0.2 MPa of 02 pressure at 80 ℃ in 6 h.