Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Molecular Catalysis called Immobilized chiral rhodium nanoparticles stabilized by chiral P-ligands as efficient catalysts for the enantioselective hydrogenation of 1-phenyl-1,2-propanedione, Author is Ruiz, Doris; Maki-Arvela, Paivi; Aho, Atte; Chimentao, Ricardo; Claver, Carmen; Godard, Cyril; Fierro, Jose L. G.; Murzin, Dmitry Yu., which mentions a compound: 32305-98-9, SMILESS is CC1(C)O[C@@H](CP(C2=CC=CC=C2)C3=CC=CC=C3)[C@H](CP(C4=CC=CC=C4)C5=CC=CC=C5)O1, Molecular C31H32O2P2, Computed Properties of C31H32O2P2.
This work reports the efficient synthesis of enantio-enriched alcs. by asym. hydrogenation of 1-phenyl-1,2-propanedione using chiral nanoparticles (NPs) supported on SiO2. The chiral catalysts were synthesized by reducing the [Rh(μ-OCH3)(C8H12)]2 precursor under H2 in the presence of P-chiral ligands as stabilizers and SiO2 as support. Synthesis of catalysts in mild conditions was performed from labile organometallic precursor and chiral ligands provided small and well defined chiral nanoparticles (≤ 3 nm). The catalysts were characterized by XPS, HR-TEM, EDS, XRD and N2 physisorption isotherm. The phys. chem. properties of the materials were correlated with the catalytic results obtained in the asym. hydrogenation of 1-phenyl-1,2-propanedione. In 1-phenyl-1,2-propanedione hydrogenation the best results using chiral catalysts allowed 98% conversion and enantiomeric excess of 67% to (R)-1-hydroxy-1-phenyl-propan-2-one and 59% for (R)-2-hydroxy-1-phenylpropan-1-one. Catalyst recycling studies revealed that chiral nanoparticles immobilized on SiO2 are stable. These catalysts do not need extra amount of chiral modifier or inducer added in situ and could be reused without loss of enantioselectivity.
《Immobilized chiral rhodium nanoparticles stabilized by chiral P-ligands as efficient catalysts for the enantioselective hydrogenation of 1-phenyl-1,2-propanedione》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound((((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine))Computed Properties of C31H32O2P2.
Reference:
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