Selective aerobic oxidation of styrene to benzaldehyde catalyzed by water-soluble palladium(II) complex in water

被引：61

作者：

Feng, Bo ^{[1
]}

Hou, Zhenshan ^{[1
]}

Wang, Xiangrui ^{[1
]}

Hu, Yu ^{[1
]}

Li, Huan ^{[1
]}

Qiao, Yunxiang ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

来源：

GREEN CHEMISTRY | 2009年 / 11卷 / 09期

基金：

中国国家自然科学基金;

关键词：

AMPHIPHILIC RESIN-DISPERSION; ORGANIC-REACTIONS; ALCOHOL OXIDATION; TERMINAL OLEFINS; MOLECULAR-OXYGEN; WACKER OXIDATION; METHYL KETONES; DOUBLE-BOND; CLEAVAGE; SOLVENTS;

D O I：

10.1039/b900807a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Selective oxidation of styrene to benzaldehyde has been carried out for the first time in aqueous phase by using a green and water-soluble palladium(II) complex as a catalyst under neutral, chloride and base-free conditions. The influences of reaction temperature, reaction time, palladium concentration and O-2 pressure on the conversion of styrene and the selectivity to benzaldehyde have been discussed. The reaction products, benzaldehyde, benzoic acid, acetophenone are readily isolated by ether extraction at room temperature. The water-soluble catalyst immobilized in aqueous phase can be reused for eight catalytic runs with an almost constant catalytic activity for the styrene oxidation. The influence of substituting groups in the aromatic ring of styrene on the reactivity was also discussed. Spectroscopic studies revealed that the hydrophilic dipyridyl-based ligand (L) with Pd(OAc)(2) formed a water-soluble Pd(II) complex. The UV/Vis spectra analysis further showed that the Pd(II)-L complex could serve as the catalytically active species in the present catalytic system.

引用

页码：1446 / 1452

页数：7

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