Abstract:
A novel polymer-supported Lewis acid catalyst which has high activity in reactions in an aqueous medium, can be easily recovered, and is highly reusable. The catalyst comprises a polymer film and Lewis acid groups represented by general formula (I) MXn, wherein M represents a polyvalent element; X represents an anionic group, and n is an integer corresponding to the valence of M bonded to and supported on the film through SO3 or SO4 groups.
Abstract:
An anilide is reacted with an acylating agent by using as a catalyst a tri(perfluoroalkane sulfonate) compound of any of the elements belonging to the groups 3 to 5 and the groups 13 to 15 in the periods 4 to 6 of the periodic and thus the acyl group in the benzene ring is bonded. Thus, ketoaniline derivatives which are useful as physiologically active compounds or intermediates in synthesizing the same are synthesized at a high reaction yield by the catalytic acylation.
Abstract:
A novel method of an amidocarbonylation reaction among an aldehyde compound, an amide compound, and carbon monoxide, which comprises using a palladium-supporting crosslinked-polymer composition containing palladium clusters having a major-axis length of 20 nm or shorter to conduct the amidocarbonylation reaction. Thus, an N-acyl-α-amino acid can be more efficiently and selectively synthesized in a clean reaction system. Also provided is a catalyst for use in the method.
Abstract:
A method of catalytic reaction uses a micro-reactor (1) with a metal catalyst (5) or a metal complex catalyst (5) as a solid phase supported on the inner wall (4c) of a channel (4), a solution (7) dissolving a reactant as a liquid phase and hydrogen (9) as a gas phase are flown through the channel (4) in pipe flow state, and the reaction of the solution (7) and the gas (9) accelerated by the metal catalyst (5) or the metal complex catalyst (5) is conducted by three phase catalytic reaction of solid - liquid - gas phases. The metal catalyst (5) or the metal complex catalyst (5) is incorporated in a polymer, and hydrogenation reaction by three phase catalytic reductive reaction of a substance to be reduced can be conducted in short time at good yield. For hydrogenation reaction of unsaturated organics, the rate of reaction and yield are high when palladium catalyst is used, and carbonylation reaction can be conducted if carbon monoxide is used instead of hydrogen.
Abstract:
An asymmetric synthesis of amino acid compound that is useful as a starting material or synthetic intermediate for production of medicinal products, agrichemicals, perfumes, functional polymers, etc. There is provided a method of enanthio-selective nucleophilic addition reaction to imine compound being a method of nucleophilic addition reaction of enamide compound accompanied by amino formation to imino group (-CH=N-) of imine compound, characterized in that the reaction is performed in the presence of a chiral copper catalyst. Further, there is provided a novel method of synthesizing an amino acid compound, etc., to which the above is applied.
Abstract:
A method of an enantioselective nucleophilic addition reaction to carbonyl, which enables an asymmetric synthesis of an optically active α-hydroxy-γ-keto acid ester, an optically active α-hydroxy-γ-amino acid ester, hydroxydiketone compounds, etc. being useful as a raw material or synthesis intermediate for producing a pharmaceutical preparation, an agricultural chemical, a fragrance, a functional polymer or the like. In this method, the nucleophilic addition reaction of enamide compound accompanied by hydroxyl (-OH) formation to carbonyl is carried out in the presence of a chiral catalyst with copper or nickel.