Homogeneous catalytic hydrogenation of free carboxylic acids in the presence of cluster ruthenium carbonyl hydrides |
| |
Authors: | Mario Bianchi Gloria Menchi Franco Francalanci Franco Piacenti Ugo Matteoli Piero Frediani Carlo Botteghi |
| |
Affiliation: | Cattedra di Chimica Organica Industriale, University of Florence, via G. Capponi 9, 50121 Florence Italy;CNR-CS Cause Deperimento Metodi Conservazione Opere Arte, Florence Italy;Istituto di Chimica Applicata, University of Sassari, Via Vienna 2, 07100 Sassari Italy |
| |
Abstract: | Saturated monocarboxylic acids up to C6, several bicarboxylic acids and some of the corresponding anhydrides are hydrogenated in the homogeneous phase with H4Ru4(CO)8(PBu3)4 as catalyst to give the corresponding alcohols (present among the reaction products as esters) or lactones at 100–200°C under a pressure of 100–200 atm of hydrogen. Anhydrides react at temperatures lower than those needed for acids. Esters are not reduced. Only δ-valerolactone is hydrogenated to 1,5-pentanediol. Ruthenium carbonyl carboxylates have been recovered at the end of the reaction and appear to be catalytically active intermediates. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|