Gas-phase Meerwein-Ponndorf-Verley reaction:: correlation of the 3665 cm-1 IR band with the cis-alcohol selectivity

被引：17

作者：

Akata, B ^{[1
]}

Warzywoda, J ^{[1
]}

Sacco, A ^{[1
]}

机构：

[1] Northeastern Univ, Ctr Adv Micrograv Mat Proc, Dept Chem Engn, Boston, MA 02115 USA

来源：

JOURNAL OF CATALYSIS | 2004年 / 222卷 / 02期

基金：

美国国家航空航天局;

关键词：

IR spectroscopy; Lewis acidity; Meerwein-Ponndorf-Verley reaction; zeolite beta;

D O I：

10.1016/j.jcat.2003.11.008

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：

The two Lewis acid sites assumed to catalyze the Meerwein-Ponndorf-Verley (MPV) reaction are identified by IR bands at 3782 and 3660-3680 cm(-1). Different combinations of heat-treatment protocols were used and the results indicated that the final temperature, ramp rate, and gas environment make a difference in the relative intensities of the 3782 and 3665 cm(-1) bands. Combining different heat-treatment procedures, samples were produced where the 3782 and 3665 cm(-1) band intensities moved in opposite directions (i.e., one increasing and the other decreasing). The MPV reduction of 4-tert-butylcyclohexan one with 2-propanol in the gas phase was studied at 100 degreesC in a nitrogen atmosphere. The increasing trend of the relative intensity of the 3665 cm(-1) band showed a correlation in favor of the formation of cis-4-tert-butylcyclohexanol (cis-4-TBCHL). This suggests that the species associated with the 3665 cm(-1) band are likely responsible for cis-4-TBCHL selectivity. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：397 / 403

页数：7

共 26 条

[1] Optimization of zeolite Beta by steaming and acid leaching for the acylation of anisole with octanoic acid: a structure-activity relation [J].