Comparative behavior of silica-embedded tert-butyldimethylsilyltrifluoro-methanesulfonate and lanthanum triflate catalysts

被引：11

作者：

Pârvulescu, AN

Gagea, BC

Pârvulescu, V

Pârvulescu, VI

Poncelet, G

Grange, P

机构：

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

[2] Romanian Acad Sci, Inst Phys Chem, Bucharest, Romania

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

来源：

CATALYSIS TODAY | 2002年 / 73卷 / 1-2期

关键词：

tert-butyidimethylsilyltrifluoro-methanesulfonate; lanthanum triflate; 3-methylbenzaldehyde; hexadecyltrimethylammonium bromide; silica; methyl ester of 1-cyclopentenylacetic acid;

D O I：

10.1016/S0920-5861(01)00510-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of hybrid catalysts containing tert-butyldimethylsilyltrifluoro-methanesulfonate (BDMST) or lanthanum triflate (LaT), hex adecyltrimethylammonium bromide and silica were obtained by sol-gel immobilization. The catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, TG-DTA, H-1, C-13, and Si-29 solid state MAS-NMR, XRD, TEM, scanning electron microscopy (SEM), XPS and, FT-IR after adsorption of NH3. The catalytic tests were carried out in the reaction of the methyl ester of 1-cyclopentenylacetic acid in various solvents. The results revealed a completely different behavior of the hybrid catalysts compared with catalysts without surfactant or with free tert-butyldimethylsilyltrifluoro-methanesulfonate, or lanthanum triflate, or triflic acid, indicating a behavior for a typical heterogeneous catalyst. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：177 / 185

页数：9

共 16 条

[1] Scandium trifluoromethanesulfonate, a novel catalyst for the addition of allyltrimethylsilane to aldehydes. [J].