7782-51-6Relevant articles and documents
RHODIUM CATALYST AND METHOD FOR MANUFACTURING OPTICALLY ACTIVE COMPOUND USING THE SAME
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Paragraph 0024; 0025; 0026, (2017/01/05)
PROBLEM TO BE SOLVED: To provide a new rhodium complex stable in the air, easy in handling and using an inexpensive optically active H-phosphinate HP(O)R(OR') as a ligand, and a method for asymmetrically hydrogenating olefins efficiently using the same. SOLUTION: The rhodium complex compound has a structure represented by the following general formula (I). (Where in the formula (I), R1 and R2 are carbon substituents which may be the same or different, and two olefins coordinated in Rh may combine with each other as shown by a dotted line to form a ring structure.) COPYRIGHT: (C)2015,JPOandINPIT
Facile synthesis of chiral diphosphine-containing multiple dendrimeric catalysts for enantioselective hydrogenation
Zhao, Liwen,Liu, Ji,Feng, Yu,He, Yanmei,Fan, Qinghua
, p. 2009 - 2015,7 (2020/09/09)
A new kind of chiral diphosphine PyrPhos-functionalized codendrimers have been synthesized via a liquid-phase strategy in high yields. The resulting dendrimeric PyrPhos ligands were purified by a simple solvent precipitation without the need for chromatographic separation, and well characterized by 1H, 13C and 31P NMR, MALDI-TOF mass spectroscopy as well as elemental analysis. Their rhodium complexes were applied to the asymmetric hydrogenation of α-acetamido cinnamic acids. Excellent enantioselectivities were achieved, which are comparable to those with the corresponding small molecular catalysts. In addition, these codendrimeric catalysts showed better catalytic performance than the dendrimeric catalysts with Rh(PyrPhos) sites located in the focal point of poly(aryl ether) dendrons or in the periphery of poly(propyleneimine) dendrimers.
NEW ORTHO-FUNCTIONALIZED P-CHIRAL ARYLPHOSPHINES AND DERIVATIVES: THEIR PREPARATION AND USE IN ASYMMETRIC CATALYSIS
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Page/Page column 21, (2010/07/04)
The invention relates to novel organo phosphorus P-chiral optically active compounds of formula (I) having a hydroxyl, mercapto, amino, carboxyl, sulfonyl group on aryl near a phosphorus atom, to the preparation and the use thereof in then asymmetrical catalysis of unsaturated compounds. Novel acylphosphine optically pure ligands embodied in the form of transition metal complexes exhibit an increased activity and enantloselectivity, in particular in asymmetrical hydrogenation, in comparison with the same type Uganda such as DiPAMP.