摘要:
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with bidentate ligands, having one amino or imino coordinating group and one phosphino coordinating group, in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively.
摘要:
Die Erfindung richtet sich auf molekulargewichtsvergrößerte homogen lösliche Liganden für Hydrierkatalysatoren aufweisend homochirale aktive Zentren, wobei spezielle Linker zwischen aktivem Zentrum und Polymergerüst eingefügt sein können. Die Liganden können in Katalysatoren überführt vorteilhaft in Membranreaktoren in quasikontinuierlichen oder kontinuierlichen organischen Synthesen eingesetzt werden. Verfahren und Verwendung, Katalysatoren.
摘要:
The present invention relates to catalytic materials for hydrogenation or asymmetric hydrogenation. In particular, the invention relates to iron (II) complexes containing unsymmetrical tetradentate diphosphine (PNN'P) ligands with two different nitrogen donor groups useful for catalytic transfer hydrogenation or asymmetric transfer hydrogenation of ketones, aldehydes and imines.
摘要:
Provided is an alcohol production method comprising the step of reducing an ester or a lactone with hydrogen to produce a corresponding alcohol without addition of a base compound by using, as a catalyst, a ruthenium complex represented by the following general formula (1): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ RuH(X)(L 1 )(L 2 ) n €ƒ€ƒ€ƒ€ƒ€ƒ(1) wherein X represents a monovalent anionic ligand, L 1 represents a tetradentate ligand having at least one coordinating phosphino group and at least one coordinating amino group or a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, and L 2 represents a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, provided that n is 0 when L 1 is the tetradentate ligand, and n is 1 when L 1 is the bidentate aminophosphine ligand.
摘要:
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with bidentate ligands, having one amino or imino coordinating group and one phosphino coordinating group, in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively.
摘要:
There is provided a process for the reduction of one or more amide moieties in a compound comprising contacting the compound with hydrogen gas and a transition metal catalyst in the presence or absence of a base under conditions for the reduction an amide bond. The presently described processes can be performed at low catalyst loading using relatively mild temperature and pressures, and optionally, in the presence or absence of a base or high catalyst loadings using low temperatures and pressures and high loadings of base to effect dynamic kinetic resolution of achiral amides.
摘要:
Provided is an alcohol production method comprising the step of reducing an ester or a lactone with hydrogen to produce a corresponding alcohol without addition of a base compound by using, as a catalyst, a ruthenium complex represented by the following general formula (1):
RuH(X)(L 1 )(L 2 ) n (1)
wherein X represents a monovalent anionic ligand, L 1 represents a tetradentate ligand having at least one coordinating phosphino group and at least one coordinating amino group or a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, and L 2 represents a bidentate aminophosphine ligand having one coordinating phosphino group and one coordinating amino group, provided that n is 0 when L 1 is the tetradentate ligand, and n is 1 when L 1 is the bidentate aminophosphine ligand.
摘要:
The present disclosure relates to processes and methods of generating hydrogen via the hydrolysis or solvolyis of a compound of the formula (I), R1R2HNBHR3R4, using ligand-stabilized homogeneous metal catalysts.
摘要:
The invention relates to a method for the production of optically active carbonyl compounds by means of asymmetrical hydrogenation of α,ß-unsaturated carbonyl compounds in the presence of optically active transition metal catalysts which are soluble in the reaction mixture, said catalysts comprising at least one carbon monoxide ligand. The invention specifically relates to a method for the production of optically active aldehydes or ketones, in particular citronellal by means of the asymmetrical hydrogenation of the correspondingly optically active α,ß-unsaturated aldehydes or ketones.