Patent application number | Description | Published |
20080269496 | Method for Producing Optically Active Hydroxymethylated Compounds - The present invention presents a catalyst that allows asymmetric hydroxymethylation reactions to progress with excellent asymmetric selectivity and a production method for optically active hydroxymethylated compounds using the catalyst. Optically active hydroxymethylated compounds are obtained with excellent asymmetric selectivity by using a catalyst obtained by mixing chiral ligands (for example, chemical formula 4) | 10-30-2008 |
20090143607 | Polysilane-Supported Transition Metal Catalyst - The present invention provides a polysilane-supported transition metal catalysts or a polysilane/inorganic compound-supported transition metal catalysts, wherein various types of transition metals are supported by polysilane compounds, or combination of polysilanes and inorganic compounds. The catalysts of the present invention are hardly soluble in hydrocarbons and alcohols and are useful as catalysts in heterogeneous system for various organic synthetic reactions using the above solvents. Polysilanes supporting transition metals are easily crosslinkable by thermal treatment, microwave irradiation, UV irradiation or chemical methods such as hydrosilylation reaction and are changed to be insoluble in various solvents keeping high catalytic activity. Moreover, the stability and operability of polysilane-supported transition metal catalysts will be improved by the support thereof on inorganic compounds. These polysilane-supported transition metal catalysts show a high catalytic activity in hydrogenation reaction, hydrosilylation reaction, Heck reaction, Suzuki-Miyaura coupling reactions and the like. The catalyst is easily recoverable and reusable and the leakage of metals is extremely few. | 06-04-2009 |
20090318729 | IMMOBILIZED LEWIS ACID CATALYSTS COATED WITH IONIC LIQUIDS AND USE THEREOF - The invention provides a novel immobilized Lewis acid catalyst which exhibits high catalytic activity in an aqueous solution and which permits recovery and reuse or long-term continuous use. The invention relates to an immobilized Lewis acid catalyst comprising a solid substance and a Lewis acid supported on the surface of the solid substance by chemical bonding, wherein the surface of the solid substance and the peripheries of the Lewis acid are coated with an ionic liquid, more specifically, an immobilized Lewis acid catalyst comprising a solid substance such as silica gel or an organic polymer and a Lewis acid stable even in water which is supported on the surface of the solid substance by chemical bonding, wherein the surface of the solid substance and the peripheries of the Lewis acid are completely or partially coated with a hydrophobic ionic liquid; a process for the production of the catalyst; use thereof; and a process for the preparation of compounds with the catalyst. | 12-24-2009 |
20100029968 | ASYMMETRIC REACTION CATALYST AND METHOD FOR PREPARING OPTICALLY ACTIVE COMPOUND USING THE SAME - An asymmetric reaction catalyst is obtained by mixing a pentavalent niobium compound and an optically active triol or tetraol having a binaphthol structure of R or s configuration, and the triol is represented by the following formula: | 02-04-2010 |
20110054190 | CATALYST AND REACTION PROCESS - Disclosed is a technology for enabling an efficient asymmetric Michael addition reaction which does not require a large amount of a malonic ester, while having a short reaction time. Specifically disclosed is a catalyst which is composed of MX | 03-03-2011 |
20110071310 | DIAMINO ACID DERIVATIVE STARTING MATERIAL, MANUFACTURING METHOD THEREOF, AND DIAMINO ACID DERIVATIVE MANUFACTURING METHOD - Provided is an efficient technology for synthesizing diamino acids (diamino acid derivatives). Disclosed is a manufacturing method for diamino acid derivatives wherein the fluorenyl groups of the diamino acid derivative starting materials represented by General Formula [II] or [IV] are removed. | 03-24-2011 |
20120029241 | METHOD FOR PRODUCING CARBONYL COMPOUND, CATALYST, AND METHOD FOR PRODUCING CATALYST - The method for producing a carbonyl compound according to the invention comprises a step of obtaining a carbonyl compound by oxidation of a secondary alcohol in the presence of a catalyst, wherein the catalyst comprises a carrier obtained by the use of a styrene-based polymer with side chains containing crosslinkable functional groups, wherein the crosslinkable functional groups in the carrier are crosslinked, gold-platinum nanosize clusters supported on the carrier and carbon black supported on the carrier. The production method allows production of a carbonyl compound by oxidation of a secondary alcohol, with high selectivity and a high conversion rate. | 02-02-2012 |
20130059999 | GOLD-POLYMER NANOSTRUCTURE-IMMOBILIZED SCANDIUM CATALYST AND ITS USE - The present invention provides a Scandium catalyst that can be used in water or water-soluble organic solvent with no leaching of Scandium. Provided is a gold-polymer nanostructure-immobilized Scandium catalyst, which is formed by preparing, in liquid phase, a mixture comprising gold clusters with from 1 to 50 nm of diameter, disulfide monomer, sulfonic acid salt of disulfide and Lewis acid metal compound represented by ScY | 03-07-2013 |
20140012016 | DIAMINO ACID DERIVATIVE STARTING MATERIAL, MANUFACTURING METHOD THEREOF, AND DIAMINO ACID DERIVATIVE MANUFACTURING METHOD - Provided is an efficient technology for synthesizing diamino acids (diamino acid derivatives). Disclosed is a manufacturing method for diamino acid derivatives wherein the fluorenyl groups of the diamino acid derivative starting materials represented by General Formula [II] or [IV] are removed. | 01-09-2014 |