Abstract:
The present application discloses novel PWNN and PWNWP metal catalysts for organic chemical syntheses including hydrogenation (reduction) of unsaturated compounds or dehydrogenation of substrates. The range of hydrogenation substrate compounds includes esters, lactones, enals, enones, enolates, oils and fats, resulting in alcohols, enols, diols, and triols as reaction products. The catalysts of current application can be used to catalyze a hydrogenation reaction under solvent free conditions. The present catalysts also allow the hydrogenation to proceed without added base, and it can be used in place of the conventional reduction methods employing hydrides of the main-group elements. Furthermore, the catalysts of the present application can catalyze a dehydrogenation reaction under homogenous and/or acceptorless conditions. As such, the catalysts provided herein can be useful in substantially reducing cost and improving the environmental profile of manufacturing processes for a variety of chemicals.
Abstract:
The present invention discloses new organic compounds (e.g., ligands), their metal complexes and compositions using those compounds. The invention also relates to the field of catalysis. In particular, this invention relates to new compounds which when combined with suitable metals or metal precursor compounds provide useful catalysts for various bond-forming reactions, including Suzuki cross-coupling or aryl amination reactions. The invention also relates to performing Suzuki cross coupling reactions with unreactive aryl-chlorides.
Abstract:
Novel aminomethylphosphine ligands have particular substituents on the central carbon atom. Such ligands form coordination complexes that may be catalysts for the polymerization of monomers or other catalytic induced reactions.
Abstract:
An amidine-carboxylic acid complex in accordance with an aspect of the invention has an amidine ligand and a carboxylic acid ligand that are coordinated to one metal atom or a plurality of metal atoms of the same element. A multiple-complex-containing compound, i.e. a bridged polynuclear complex, in accordance with the aspect of the invention is formally derived from two or more such amidine-carboxylic acid complexes, linked by a polyvalent carboxylic acid ligand. The bridged polynuclear complex may be used in a production method to support metal (oxide) clusters on a porous support by impregnating these with a solution thereof, followed by drying and firing.
Abstract:
The invention accordingly relates to the use of a composition comprising (i) at least one metal complex of formula (1) [L n Me m X p ] Z Y q (1), wherein all substituents have the meanings as defined in the claims and (ii) at least one polyphosphonate as oxidation catalyst for peroxide compounds, as well as to novel detergent compositions.
Abstract:
A phosphonium borate compound represented by the general formula (I) (compound (I)). Provided are: A) a new process in which the compound (I) is safely produced on an industrial scale in a high yield through simple reaction operations; B) the novel compound, which is easy to handle; and C) a novel use in a catalyst. General formula (I): (R )(R )(R )PH.BAr4 [In the formula, R , R , R , and Ar are the same as in the description.] A) The process is characterized by reacting a phosphine with a) HCl or b) H2SO4 to yield a) a hydrochloric acid salt or b) a sulfuric acid salt and then reacting the salt with a tetraaryl borate compound. B) The compound (I) is characterized in that it has a secondary or tertiary alkyl or the like as R and can be easily handled even in air without necessitating special caution. C) The use is in a transition metal complex catalyst for use in reactions for C-C, C-N, and C-O bond formation, and is characterized in that the compound (I) is used in place of an unstable phosphine compound to produce the same effect.
Abstract:
A process for industrially advantageously producing either the compound represented by the following formula [I]: [I] or a pharmacologically acceptable salt of the compound, which are useful as an anticancer agent; and a hydrogenation catalyst for use in the process.
Abstract:
A tethered ligand comprising the reaction product of an organofunctional silica and a ligand containing a functional group capable of reaction with said organofunctional silica, wherein the organofunctional silica is prepared from an alkyl silicate and an organofunctional silane is described. A supported catalyst is also described comprising additionally a source of catalytically-active metal. Methods for preparing the tethered ligand and supported catalyst are provided and uses of the supported catalyst for performing asymmetric reactions are claimed. The catalysts are readily separable from the reaction mixtures and may be re-used if desired.
Abstract:
La présente invention concerne des nanoparticules utilisables comme catalyseurs, notamment comme catalyseurs d'hydrosilylation et de silylation déshydrogénante. Plus spécifiquement, la présente invention concerne des nanoparticules d'au moins un métal de transition au degré d'oxydation 0, choisi parmi les métaux des colonnes 8, 9 et 10 du tableau périodique des éléments, et comprenant au moins un ligand carbonyle, et comprenant de préférence un siliciure.