[EN] HYDROGENATION OF ESTERS OR CARBONYL GROUPS WITH TETRADENTATE AMINO/IMINO-THIOETHER BASED RUTHENIUM COMPLEXES [FR] HYDROGÉNATION DE GROUPES ESTERS OU CARBONYLES AVEC DES COMPLEXES DU RUTHÉNIUM À BASE D'AMINO/IMINO-THIOÉTHER TÉTRADENTATE
Getting more for less: In the presence of H2 and a base, air‐ and moisture‐tolerant RuII complexes catalyze the hydrogenation of ketones and aldehydes with excellent activity and chemoselectivity, and with enantioselectivity of up to 95 % under mild conditions. The ratio of substrate to catalyst can be lowered to 106:1. The reactions tolerate scale‐up and can be carried out with almost no solvent. A base‐free
[EN] HYDROGENATION OF ESTERS OR CARBONYL GROUPS WITH TETRADENTATE AMINO/IMINO-THIOETHER BASED RUTHENIUM COMPLEXES<br/>[FR] HYDROGÉNATION DE GROUPES ESTERS OU CARBONYLES AVEC DES COMPLEXES DU RUTHÉNIUM À BASE D'AMINO/IMINO-THIOÉTHER TÉTRADENTATE
申请人:FIRMENICH & CIE
公开号:WO2012084810A1
公开(公告)日:2012-06-28
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of specific ruthenium catalysts, or pre-catalysts, in hydrogenation processes for the reduction of ketones and/or aldehydes into the corresponding alcohol respectively. Said catalysts are ruthenium complexes comprising a tetradentate ligand (L4) coordinating the ruthenium with: - two nitrogen atoms, each in the form of a primary or secondary amine (i.e. a NH2 or NH group) or N-alkyl imine functional groups (i.e. a C=N group), and - two sulfur atoms, each in the form of thioether functional groups.