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Matches 301 - 350 out of 1,703

Document Document Title
WO/1999/045173A1
The invention relates to a method for carboxylating terminal alkynes in which terminal alkynes are used which have at least one additional aliphatic carbon atom in $g(a)-position and which do not posses a proton which has a higher acidit...  
WO/1999/042211A1
An oxidation catalyst system comprising (A) a ruthenium compound and (B) a dihydroxybenzene or an oxidation product thereof. Examples of the ruthenium compound (A) include ruthenium complexes, e.g., dichlorotris(triphenylphosphine)ruthen...  
WO/1999/041219A1
Acylating agents comprising: (A) a 1,2-dicarbonyl compound or its hydroxy-reduction derivative; (B) an enzyme; and (C) at least one compound selected from among (c1) metal compounds and (c2) imide compounds such as N-hydroxyphthalimide. ...  
WO/1999/041215A1
A method of cleaving a carbon-nucleophile bond in a chemical compound, said method comprising the steps of: a) adding a Lewis acid to said compound; b) allowing the reaction to proceed; and c) subsequently quenching said reaction. The me...  
WO/1999/038613A1
The invention relates to a method for obtaining advantageous catalysts, especially for hydrogenation. According to said method, a suspension of a ruthenium compound with a specific surface area of 50 to 300 m?2¿/g is brought together wi...  
WO/1999/032434A1
An improved process for the preparation of cis-1,3-diols is described where a beta hydroxy ketone is treated with a trialkylborane or dialkylalkoxyborane or a mixture of a trialkylborane and a dialkylalkoxyborane followed by recovery and...  
WO/1999/031030A1
The invention concerns a method for O-alkylation of phenol compounds comprising at least an acid, ester, aldehyde, amide or nitrile functional group, which consists in reacting said phenol compound with a halogenated aliphatic hydrocarbo...  
WO/1999/026936A2
A process for oxidizing organic compounds is disclosed. Hydrogen peroxide is used to oxidize an oxidizable organic substrate in the presence of a silica-modified titania/silica-containing catalyst. A method for preparing a catalyst using...  
WO/1999/025666A2
A process for oxidizing organic compounds is disclosed. Hydrogen peroxide is used to oxidize an oxidizable organic substrate in the presence of a silica-modified titania/silica-containing catalyst. A method for preparing a catalyst using...  
WO/1999/021810A1
The invention relates to a method for producing phenols, aldehydes, esters and/or ketones with the utilization of lignin and/or lignin sulphonic acid in which the starting materials containing lignin or the lignin sulphonic acid are heat...  
WO/1999/021817A1
Lewis acid-catalysed reaction of alkenes (including cycloalkenes) with an epoxide is a novel reaction useful for synthesis of various fragrance materials (known and novel) and their intermediates.  
WO/1999/019275A1
A process for electrophilic substitution of an aromatic compound, comprising contacting said aromatic compound, a precursor of the desired substituent and an aqueous reagent containing zinc halide, at an elevated temperature.  
WO/1999/018057A1
One aspect of the present invention relates to novel reaction conditions that allow the efficient synthesis of diaryl ethers from arenes bearing a leaving group and arenols under relatively mild conditions. Another aspect of the present ...  
WO/1999/018064A1
The invention concerns a method for functionalizing a phenolic compound bearing an electron-donor group, in said group para position, inter alia a method for the amidoalkylation of a phenolic compound bearing an electron-donor group, and...  
WO/1999/017878A1
Compounds are used as catalysts according to general formula (1) M?+x¿(C(SO¿2?CF¿3?)¿3?)¿x? whereby x is equal to 1 or 2; M represents one hydrogen or alkaline metal atom when x equals 1; and M represents one alkaline-earth metal at...  
WO/1999/012885A1
The invention relates to novel substituted alkenoic acids and their derivatives, to methods for producing them, and to their use as fungicides.  
WO/1999/006338A1
The invention concerns a method for controlled oxidation of a substituted hydrocarbon substrate, consisting in contacting said substituted hydrocarbon substrate with a source of oxygen in the presence of at least a catalyst selected amon...  
WO/1999/005126A1
The invention concerns ionic compounds wherein the negative charge is highly delocalized. The compounds contain at least a perfluorovinyl group and at least a group selected among -O or one of the groups -NC$m(Z)N, -(C$m(Z)N)¿2?, -NSO¿...  
WO/1999/003810A1
The invention relates to a method for producing oxo products by hydroformylation of substrates with C=C double bonds, using unmodified rhodium catalysts in a reaction mixture consisting essentially of the substrates, the catalyst and car...  
WO/1999/000535A1
The invention concerns a method for preparing 2-aryl or 2-heterocyclyl chiral propionic acids and their esters by electrochemical reduction of a mixture of a propionic acid derivative of formula (II) in which R¿3? represents a radical o...  
WO/1998/055228A1
The invention relates to a method for regenerating a zeolitic catalyst, comprising the following steps: (I) at least one partially deactivated catalyst is heated to a temperature ranging from 250 to 600 �C in an atmosphere containing l...  
WO/1998/055430A1
The invention relates to a method for oxidizing an organic compound containing at least one C-C double bond or a mixture of two or more thereof, comprising the following steps: (I) production of a hydroperoxide; (II) reaction of an organ...  
WO/1998/053910A1
The invention relates to a moulded, activated metallic fixed-bed catalyst having a pore volume of 0.05-1 ml/g and an outer, activated shell consisting of a sintered, small-particle catalyst alloy as well as optional catalyst promoters. T...  
WO/1998/040339A1
The invention concerns a method for the acylation or sulphonation of an aromatic compound. More particularly, the invention concerns a method for the acylation or sulphonation of an activated or deactivated aromatic compound and is usefu...  
WO/1998/030329A1
At least one functional group selected between nitro and carboxyl groups can be introduced into a substrate by bringing the substrate into contact with at least one reactant selected from among (i) nitrogen oxides and (ii) carbon monoxid...  
WO/1998/030517A1
The invention concerns a method for reducing a carbonyl-containing compound. More precisely it concerns a method for reducing a aldehyde and/or a ketone. The reduction method which consists in reacting a carbonyl-containing compound with...  
WO/1998/029399A1
The invention relates to ionic compounds in which the anionic load has been delocalized. A compound disclosed by the invention includes an anionic portion combined with at least one cationic portion M?+m� in sufficient numbers to ensur...  
WO/1998/029388A1
The invention relates to ionic compounds in which the anionic load has been delocalized. A compound disclosed by the invention is comprised of an amide or one of its salts, including an anionic portion combined with at least one cationic...  
WO/1998/029877A1
Disclosed is a proton conductor in liquid form, comprised of a mixture of the following components: (a) a salt combined with a nitrogenated base along with an acid, according to formula (I), wherein Z�1?, Z�2?, Z�3?, and Z�4?, wh...  
WO/1998/029389A1
The invention is related to ionic compounds, derivatives of malononitrile, in which the anionic load has been displaced. An ionic compound disclosed by the invention includes an anionic portion combined with at least one cationic portion...  
WO/1998/029396A1
The invention relates to ionic compounds in which the anionic load has been displaced, and the uses of these compounds. A compound disclosed by the invention comprises an anionic portion combined with at least one cationic portion M?+m...  
WO/1998/029358A2
Disclosed is a method for grafting a polymer onto the surface of a carbonate material with carboxyl, amine, and/or hydroxyl functions on its surface. Said material is placed in suspension in a solution including the polymer to be grafted...  
WO/1998/015509A1
Method of performing alkylation or acylation reactions of aromatic substrates under supercritical or near-critical reaction conditions. In particular, a method of performing Friedel-Crafts alkylation or acylation reactions is disclosed u...  
WO/1997/048665A1
The invention discloses an acylation method for an aromatic compound. The acylation method that consists in reacting the said aromatic compound with an acylation agent, in the presence of a zeolite catalyst, is characterised in that it c...  
WO/1997/045398A1
The invention relates to a novel process for producing hydroxyarenes of general formula (I) in which n is a number 1, 2, 3, or 4, R is cyano, carboxy, formyl, nitro, halogen or possibly substituted alkyl, alkoxy, alkylthio, alkyl sulphin...  
WO/1997/043302A1
The invention relates to a method of performing a chemical reaction between a reagent and a substrate, involving an acyl transfer mechanism, in the presence of an imidazole-based catalyst capable of forming a transition complex with the ...  
WO/1997/035661A1
The invention relates to transition metal catalysts based on inorganic-organic polymers of general formula M(O3ZW)x(O3Z-X-ZO3)y(((O3P-)wY-)n-PR3-n)z, wherein M is a tetravalent metal, Z is a pentavalent atom, the condition x+2y+n.w.z = 2...  
WO/1997/034694A1
A non-chrome, copper-containing catalyst, Cu-Al-O and method of preparing the same are provided wherein the Cu-Al-O catalyst is prepared by the co-precipitation of copper nitrate (Cu(NO3)2) and sodium aluminate (Na2Al204) solutions using...  
WO/1997/029991A1
The invention relates to a process for the synthesis of beta zeolite with Si and Ti as unique lattice components. The preparation process involves the crystallization of a cogel of TiO2-SiO2 impregnated with a solution which contains an ...  
WO/1997/029062A1
A process for catalytic partial oxidation of a hydrocarbon is pro vided. The process includes: providing a feed gas mixture comprising an oxygen-containing gas and a hydrocarbon gas comprising one or more normal (C2-C4)alkanes; providing...  
WO/1997/028105A1
Processes for reducing carbonyl compounds into hydroxyl compounds easily under milder conditions, particularly a process for reducing an 'alpha'-aminohaloketone derivative stereoselectively. The above process comprises treating a carbony...  
WO/1997/023489A1
The present invention provides a new tetradentate bis-amido bis-alkoxo, 1,2-(bis-2,20diphenyl-2-hydroxyethanamido)benzene (H4PHAB) and various derivatives thereof. This ligand is able to stabilize high valent metal oxo complexes by provi...  
WO/1997/021648A1
A process is disclosed for the catalytic addition of nucleophilic agents to alkines or allenes to form alkenes that are substituted by the nucleophile and where required undergo further reaction and/or isomerisation with the nucleophile....  
WO/1997/019038A1
A perfluoroalkylation method and a reagent therefor are disclosed. The method comprises contacting a material of formula RfH and a base (or a species capable of generating a base) with a substrate bearing at least one electrophilic funct...  
WO/1997/018035A1
Selective oxidation process for organic substrates by contacting said substrates with an oxidant selected amongst hydroperoxides and/or hydrogen peroxide in the presence of a catalyst containing a metal complex of a least one multicoordi...  
WO/1997/017324A1
An aromatic thioether acylation method is disclosed. In a preferred embodiment, the method comprises condensing acetic anhydride or acetyl chloride with thioanisole. According to said aromatic thioether acylation method, said thioether i...  
WO/1997/013763A1
A chiral ligand having structure (I) wherein AR is any aromatic and/or ring structure, and R is selected from the group consisting of aryl, oxygenated aryl, alkyl, oxygenated alkyl, AR, oxygenated AR and combinations thereof.  
WO/1997/011081A1
This invention concerns modified fluorosulfonic acid compounds possessing a sulfonic acid fluoride, chloride or ester group or a sulfonic acid or a salt of a sulfonic acid group at one end and respectively a hydrolyzable or hydrolyzed si...  
WO/1997/003033A1
A process for preparing an aldehyde or ketone comprising reacting a primary or secondary alcohol with oxygen in the presence of a base, a catalytic amount of a copper salt and a suitable lignad under anhydrous conditions.  
WO/1997/002091A1
The invention relates to a supported catalyst, in which a metal of Group VIII of the periodic system is immobilized on a carbon support, wherein the catalyst comprises halogen atoms, the Group VIII metal and an activated carbon support w...  

Matches 301 - 350 out of 1,703