γ-Alumina-Supported Silver Cluster for N-Benzylation of Anilines with Alcohols

被引：135

作者：

Shimizu, Kenichi ^{[1
]}

Nishimura, Masanari ^{[1
]}

Satsuma, Atsushi ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mol Design & Engn, Nagoya, Aichi 4648603, Japan

来源：

CHEMCATCHEM | 2009年 / 1卷 / 04期

关键词：

alcohols; alkylation; amines; heterogeneous catalysis; silver; SELECTIVE CATALYTIC-REDUCTION; BORROWING HYDROGEN; SURFACE-CHEMISTRY; ALKYLATION; AMINES; METAL; AMINATION; NANOPARTICLES; SIZE; SECONDARY;

D O I：

10.1002/cctc.200900209

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An alumina-supported silver cluster with a Lewis acidic cocatalyst (polyvalent metal salts, such as FeCl3 center dot 6H(2)O) acts as a heterogeneouos and recyclable catalyst for the direct N-alkylation of anilines with benzyl alcohols, which is driven by the borrowing hydrogen mechanism. Systematic studies on the effects of metal (Pt, Pd, Au, and Ag), silver particle size/support oxides (CeO2, ZrO2, Al2O3, SiO2), and Lewis acidic additives show four important factors required to achieve selective N-alkylation of anilines: 1) metal with a weak metal-hydrogen bond energy (ie., Ag), 2) smaller size of the silver cluster, 3) the support having both acidic and basic sites (ie., Al2O3), and 4) additives with high Lewis acidity (ie., Fe salt). Fundamental information will be useful for the rational design of platinum-group metal-free heterogeneous catalyts for environmentally benign C-N bond forming reactions.

引用

页码：497 / 503

页数：7

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