Alkylation of hydroquinone with tert-butanol over silica-immobilized triflate derivatives

被引：11

作者：

Gagea, BC

Pârvulescu, AN

Poncelet, G

Pârvulescu, VI

机构：

[1] Univ Bucharest, Dept Chem Technol & Catalysis, Bucharest 70346, Romania

[2] Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

来源：

CATALYSIS LETTERS | 2005年 / 105卷 / 3-4期

关键词：

La(OTf)(3); tertbutyl-dimethyl-silyl triflate; triflic acid; alkylation; hydroquinone;

D O I：

10.1007/s10562-005-8693-6

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：

Silica immobilized La(OTf)(3), tertbutyldimethylsilyl-triflate and triflic acid proved to be very efficient catalysts for the hydroquinone alkylation with tert-butanol. In solvent free conditons, the conversion was higher than 95% with the dialkylated product (2,5-DTBHQ) formed in high yields. When a polar solvent (1,4-dioxane) was used, the selectivity towards the monoalkylated product (2-TBHQ) increased up to 90%.

引用

页码：219 / 222

页数：4

共 15 条

[11]

TSUCHIMOTO T, 1997, J ORG CHEM, V62, P6977

[12] Sulfonic acid functionalised ordered mesoporous materials as catalysts for condensation and esterification reactions [J].