Aerobic Oxidations Catalyzed by Colloidal Nanogold

被引：170

作者：

Tsukuda, Tatsuya ^{[1
]}

Tsunoyama, Hironori ^{[1
]}

Sakurai, Hidehiro ^{[2
]}

机构：

[1] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan

[2] Inst Mol Sci, Res Ctr Mol Scale Nanosci, Okazaki, Aichi 4448787, Japan

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2011年 / 6卷 / 03期

关键词：

colloids; gold; homogeneous catalysis; Lewis acids; nanoparticles; GOLD(I)-CATALYZED INTRAMOLECULAR HYDROAMINATION; STABILIZED GOLD NANOCLUSTERS; QUASI-HOMOGENEOUS CATALYSTS; UNACTIVATED ALKENES; SELECTIVE OXIDATION; ARYLBORONIC ACIDS; SUPPORTED GOLD; ALCOHOL OXIDATION; PHENYLBORONIC ACID; INTERMOLECULAR HYDROAMINATION;

D O I：

10.1002/asia.201000611

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Recently, dispersions of gold nanoclusters in liquid media (colloidal nanogold) have been extensively used as quasi-homogeneous catalysts for various aerobic oxidation reactions. This review describes recent progress in such reactions, with a focus on our comprehensive studies on gold clusters (<2 nm) stabilized by poly(N-vinyl-2-pyrrolidone) and their participation in oxidation reactions of alcohols, alpha-hydroxylation reactions of benzylic ketones, and homocoupling reactions of organoboronates, as well as formal Lewis acidic reactions, such as intramolecular hydroalkoxylation and hydroamination reactions of nonactivated alkenes. Mechanistic studies have shown that a partial electron transfer from the gold clusters to O-2 generates superoxide- or peroxide-like species and Lewis acidic centers, both of which play essential roles in the catalytic reactions.

引用

页码：736 / 748

页数：13

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