Acid-Base Pairs in Lewis Acidic Zeolites Promote Direct Aldol Reactions by Soft Enolization

被引：174

作者：

Lewis, Jennifer D. ^{[1
]}

Van de Vyver, Stijn ^{[1
]}

Roman-Leshkov, Yuriy ^{[1
]}

机构：

[1] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 34期

基金：

美国国家科学基金会;

关键词：

aldol reaction; C-C coupling; heterogeneous catalysis; Lewis acids; zeolites; SN-BETA ZEOLITES; COOPERATIVE CATALYSIS; GLUCOSE ISOMERIZATION; BOND FORMATION; CONDENSATION; SITES; MECHANISM; ACETONE; POLYMERIZATION; CONVERSION;

D O I：

10.1002/anie.201502939

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hf-, Sn-, and Zr-Beta zeolites catalyze the cross-aldol condensation of aromatic aldehydes with acetone under mild reaction conditions with near quantitative yields. NMR studies with isotopically labeled molecules confirm that acid-base pairs in the Si-O-M framework ensemble promote soft enolization through alpha-proton abstraction. The Lewis acidic zeolites maintain activity in the presence of water and, unlike traditional base catalysts, in acidic solutions.

引用

收藏

页码：9835 / 9838

页数：4

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