Homogeneous catalytic hydrogenation of long-chain esters by an osmium pincer complex and its potential application in the direct conversion of triglycerides into fatty alcohols

被引：54

作者：

Acosta-Ramirez, Alberto ^{[1
]}

Bertoli, Marcello ^{[2
]}

Gusev, Dmitry G. ^{[2
]}

Schlaf, Marcel ^{[1
]}

机构：

[1] Univ Guelph, Dept Chem, Guelph, ON N1G 2W1, Canada

[2] Wilfrid Laurier Univ, Dept Chem, Waterloo, ON MS5 3H6, Canada

来源：

GREEN CHEMISTRY | 2012年 / 14卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

NATURAL FATS; HYDROGENOLYSIS;

D O I：

10.1039/c2gc15960k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The osmium hydride complexes OsH2(CO)[NH((CH2PPr2)-Pr-i)(2)] (1) and OsHCl(CO)[NH((CH2PPr2)-Pr-i)(2)] (2) were evaluated in the catalytic hydrogenation of hexyl octanoate and cis-3-hexenyl hexanoate to alcohols as model substrates for triglycerides. Both complexes achieve full conversion of the saturated ester at 220 degrees C and 800 psi pressure of hydrogen gas. In the presence of unsaturated substrates, the complexes hydrogenate C=C bonds, but are subsequently ineffective in the reduction of the ester moiety. However complex 1 is capable of hydrogenating fully saturated triglycerides (i.e., hardened fats as obtained by separate initial hydrogenation of seed oils using either 1 or 2 or a standard heterogeneous hydrogenation catalyst) giving cetyl and stearyl alcohols as the main products.

引用

页码：1178 / 1188

页数：11

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