1367567-95-0Relevant articles and documents
Chiral amino-pyridine-phosphine tridentate ligand, manganese complex, and preparation method and application thereof
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Paragraph 0597-0600; 0603, (2020/07/13)
The invention discloses a chiral amino-pyridine-phosphine tridentate ligand, a manganese complex, and a preparation method and application thereof. The chiral amino-pyridine-phosphine tridentate ligand is shown as a formula II, and the manganese complex of the chiral amino-pyridine-phosphine tridentate ligand can be used for efficiently catalyzing and hydrogenating ketone compounds to prepare chiral alcohol compounds in a high enantioselectivity mode. The chiral amino-pyridine-phosphine tridentate ligand and the manganese complex are simple in synthesis process, good in stability, high in catalytic activity and mild in reaction conditions.
Lutidine-Based Chiral Pincer Manganese Catalysts for Enantioselective Hydrogenation of Ketones
Zhang, Linli,Tang, Yitian,Han, Zhaobin,Ding, Kuiling
supporting information, p. 4973 - 4977 (2019/03/17)
A series of MnI complexes containing lutidine-based chiral pincer ligands with modular and tunable structures has been developed. The complex shows unprecedentedly high activities (up to 9800 TON; TON=turnover number), broad substrate scope (81 examples), good functional-group tolerance, and excellent enantioselectivities (85–98 % ee) in the hydrogenation of various ketones. These aspects are rare in earth-abundant metal catalyzed hydrogenations. The utility of the protocol have been demonstrated in the asymmetric synthesis of a variety of key intermediates for chiral drugs. Preliminary mechanistic investigations indicate that an outer-sphere mode of substrate–catalyst interactions probably dominates the catalysis.
Method for Ir/f-amphox high-efficiency synthesis of chiral α- C-amino alcohol by virtue of catalytic oxidation 1,2- of P-aminoketone by using one-aminoketone
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Paragraph 0073-0078, (2020/01/03)
The invention discloses a method for efficiently synthesizing chiral 1,2-amino alcohol by catalyzing alpha-aminoketone through Ir/f-amphox. A ligand f-amphox used by the method can be more easily synthesized; the reaction has the characteristics of enanti
A feasibility study on the synthesis of phenylephrine via ruthenium-catalyzed homogeneous asymmetric hydrogenation
McGarrity, John F.,Zanotti-Gerosa, Antonio
scheme or table, p. 2479 - 2486 (2011/02/22)
We report a feasibility study on a new route to (R)-phenylephrine, based on the ruthenium-catalyzed asymmetric hydrogenation of an aminoketone precursor. The direct and fast asymmetric reduction of aminoketones or their hydrochloride salts is achievable at low catalyst loadings (molar substrate to catalyst ratio, S/C, >25,000/1, TOF up to 25,000 h-1) with high enantioselectivity (>95% ee), without the need for N-protection nor isolation of the free base prior to reaction.
Method for preparing of L-phenylephrine hydrochloride
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, (2008/06/13)
The present invention relates to an improved process for preparing L-phenylephrine hydrochloride 3 on an industrial scale by asymmetric hydrogenation as the key step and a special sequence of subsequent steps, using [Rh(COD)Cl]2 as catalyst and a chiral, two-pronged phosphine ligand such as (2R,4R)-4-(dicyclohexylphosphino)-2-(diphenylphosphino-methyl)-N-methyl-aminocarbonyl-pyrrolidine as the catalyst system.