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WO/1995/004796A1 |
A process for depolymerizing polymers by selective, partial oxidation at supercritical or near supercritical conditions for water and wherein supercritical water or water near supercritical conditions is used as a solvent and reforming a...
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WO/1995/004277A1 |
Methods for rapidly generating large rationally designed libraries of structurally-diverse small molecular weight compounds using a multicombinatorial approach. Also disclosed are compounds of formula (I).
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WO/1994/029243A1 |
Unsymmetrically substituted triphenylenes required in the synthesis of polymeric discotic liquid crystals are made using iron (III) chloride in organic solvent at room temperature to effect the oxidative coupling of 1,2-dialkoxybenzenes ...
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WO/1994/022878A1 |
An alkylating agent contains an aluminium reagent Alk3-mAlLm, in which Alk stands for a methyl, ethyl, n- or i-propyl, n-, i- or tert.-butyl, pentyl, hexyl, heptyl or octyl group, which may all also be branched, L stands for an ethoxy gr...
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WO/1994/019090A1 |
The operation of a catalytic metal oxide reactor (24) is described which is capable of the complete mineralization of a gaseous stream including several organic pollutants. Several of the reaction constraints individually improve reactio...
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WO/1994/014732A1 |
An aromatic compound (such as benzene) is alkylated with an alkene (such as propylene) by contacting the two compounds together in the presence of a tungsten on zirconia catalyst. The reaction preferably takes place at elevated temperatu...
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WO/1994/010124A1 |
Provided is a fixed-bed heterogeneous catalyst that promotes the isomerization of cis/trans-DMCD to trans-DMCD in economical fashion with short reaction times and in high purity. The catalyst is preferably H3PO4 on a metal oxide, said me...
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WO/1994/010105A1 |
The invention concerns a method of preparing polycyclic aromatic compounds by crosslinking aromatic boron acids with aromatic halogen compounds or perfluoroalkyl sulphonates in the presence of metallic palladium, optionally on a carrier,...
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WO/1994/001383A1 |
The present invention relates to a perfluoroalkylation reagent and to a method for using such reagent in order to replace a halogen or pseudo-halogen by a perfluoroalkyl group. This reagent is characterized in that it is comprised of the...
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WO/1994/000423A1 |
A process is disclosed for preparing compounds having general formula (I) by cross-coupling boric acids, borine acids or boric anhydrides derived therefrom having general formula (II), in which x1, x2, x3 and x4 represent independently f...
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WO/1993/024263A1 |
Novel zerovalent metal species and organometallic reagents are disclosed. The zerovalent metal species are directly produced by reaction of a reducing agent on a metal cyanide salt. Preferably, the zerovalent metal species are directly p...
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WO/1993/019043A1 |
An alkylating reagent having formula (I) is disclosed, as well as a process for preparing the same and its use.
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WO/1993/016969A1 |
A process is provided for the catalytic perfluoroalkylation of aromatic compounds, wherein a perfluoroalkyl iodide or mixture of iodides is reacted with an aromatic compound in the presence of an aqueous base, such as an alkali metal hyd...
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WO/1993/016761A1 |
Disclosed is a method of photochemically oxidizing gaseous halogenated organic compounds, an apparatus for photochemically oxidizing gaseous halogenated organic compounds, a lining insert for an apparatus for photochemically oxidizing ga...
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WO/1993/016022A1 |
An alkylative cycloaddition method is provided that is particularly useful for the synthesis of many of the Vitamin D analogues with differing side chains. Thus, a preferred synthesis is of Vitamin D analogues having a side chain R1 wher...
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WO/1993/009074A2 |
Compounds having acidic protons and a molecular structure which can delocalize the electron density of the conjugate base (target compounds) are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the pres...
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WO/1993/006066A1 |
A new methylating or ethylating agent, containing trimethyl aluminium or dimethyl zinc or triethyl aluminium as methyl or ethyl source, further contains catalytic amounts of one or several cuprous and/or cupric compounds. Also disclosed ...
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WO/1993/006110A1 |
The magnesium complexes of cyclic hydrocarbons and conjugated dienes, such as 1,2-dimethylenecycloalkanes and 1,3-butadienes, are readily prepared in high yields using highly reactive magnesium. Reactions of these (2-butene-1,4-diyl)magn...
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WO/1993/001173A1 |
Aromatic olefins are produced by catalytic vinylation of aryl chlorides in the presence of a base and of a palladium complex catalyst of the formula: [R6R7P(CH2)nPR8R9]2 Pd wherein n is 3 or 4 and R6 to R9 are selected from hydrogen, alk...
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WO/1993/001523A1 |
The invention provides a novel and economic method for the production of an activated propene from a malonitrile dimer which comprises reacting a compound of formula (I) with a nucleophile D to provide a compound of formula (II) wherein ...
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WO/1992/019623A1 |
A novel zerovalent copper species and an organocopper reagent are disclosed. The zerovalent copper species is directly produced by reaction of a reducing agent with a combination of copper cyanide or halide and an alkali metal halide sal...
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WO/1992/011934A1 |
There is provided a crystalline oxide material with a characteristic X-ray diffraction pattern comprising the above lines. This material may be a layered material, which is swollen or pillared. Upon calcination of the swollen material, t...
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WO/1992/007809A1 |
Process for the production of diaryls of formula (1): R?1¿¿m? - Ar - Ar - R?1¿¿m? in which: Ar is a phenylene or naphthylene group; R¿1? is a hydrogen, fluorine or chlorine atom or an unbranched or branched alkyl (C¿1?-C¿6?)-alkyl...
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WO/1992/006936A1 |
Essentially linear alkyl aromatics wherein the alkyl is attached to the aromatic ring at the beta-position are produced by the process wherein a linear hydrocarbon selected from the group consisting of linear alpha-olefins, linear alpha-...
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WO/1992/003379A1 |
Zeolites L, and in particular zeolites KL comprising silicon, aluminium and 1 to 10 % by weight of non-exchangeable zinc, are zeolites with a reduced overall electronegativity, and may be used in processes where alumino-zeolites L are co...
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WO/1992/003382A1 |
A method of producing an anhydrous niobium or tantalum pentafluoride involving reacting the corresponding pentoxide or oxyhalide with an excess of anhydrous hydrogen fluoride in the presence of a sufficient dehydrating agent (e.g., COCl2...
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WO/1992/000260A1 |
A method for the selective ethylation of a 2-substituted naphthalene compound at the 6 position of the naphthalene nucleus is disclosed.
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WO/1991/016286A1 |
A process is disclosed for producing $g(a)-fluorostyrol from fluorolefines. A halogen aromate (1) is converted into a $g(a)-fluorostyrol (III) with a fluorine substituted ethylene (II) in the presence of a palladium catalyzer. R may repr...
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WO/1991/016285A1 |
This invention relates to a process for turbulently flowing together reactants in uniform proportions in a reactor vessel and also to a process for producing ethylbenzene by reacting ethylene and benzene in the presence of a catalyst in ...
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WO/1991/014500A1 |
The present invention relates to ceramic materials containing a homogeneous dispersion of one or more metals, particularly sol-gel ceramic materials, a method of preparing the same, and processes for hydrogenating or oxidizing organic co...
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WO/1991/014665A1 |
The invention relates to the use of compounds of general formula (I): R?1¿¿a?Re¿b?O¿c?, where a is 1 to 6, b is 1 to 4, and c is 1 to 14 and the sum of a, b and c is compatible with the penta- or heptavalency of the rhenium and provi...
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WO/1991/009825A1 |
The invention pertains to rhenium (VII) compounds which are catalysts for metathesis of ordinary olefins (hydrocarbons) and functionalized olefins in a homogeneous phase and to methods of synthesizing these compounds. The rhenium compoun...
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WO/1991/009002A1 |
An improved process for the preparation of vinyl ethers by the coupling reaction of an ester of formula (I), with a carbonyl containing compound of formula (II), wherein A and R are passive organic groups and OY is a hydroxyl group or OP...
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WO/1991/006523A1 |
Described is a method of preparation of fluorobenzenes and fluorotoluenes of the formula (I) in which X is H or a methyl group, R?1¿, R?2¿ and R?3¿, independently of each other, are at least one of the residues H, F, Cl and C¿1?-C¿3...
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WO/1991/006518A1 |
Described is a method of preparation of fluorobenzenes with at least one hydrogen atom substituted on the ring and, optionally, other substituents which, independently of each other, can be chlorine, bromine, nitro, hydroxy, C¿1?-C¿3? ...
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WO/1991/005750A2 |
This invention concerns a process for preparing fluoroalkyl substituted olefins, fluorinated ketones and fluorinated aromatic compounds by the catalyzed reaction of fluoroalkylsilanes with selected fluorinated olefins, acyl fluorides and...
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WO/1990/012773A1 |
Chiral reaction medium for organic reactions consisting of a concentrated aqueous solution of at least one carbohydrate chosen from the mono-, di- and trisaccharides and their alkylglucosides, the alkyl group of which contains 1 to 4 car...
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WO/1990/009973A1 |
Process is disclosed for the preparation of 4-substituted aryl olefins from 4-substituted aryl iodides. 4-Substituted aryl iodides are contacted with an olefin in an ester solvent in the presence of a catalyst system comprising a palladi...
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WO/1990/006295A1 |
A method for the preparation of biaryl compounds is disclosed which comprises contacting an aromatic halide in the presence of a catalyst comprising zerovalent nickel, a bidentate phosphorus-containing coordinating ligand and a reducing ...
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WO/1990/004577A1 |
A method for the preparation of biaryl compounds is disclosed which comprises contacting an aryl halide under conditions suitable to form a Grignard reagent and thereafter contacting the Grignard reagent with an aryl chloride in the pres...
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WO/1989/007591A1 |
Hydrogen cyanide addition to a monosaccharide results in a mixture of product cyanohydrins whose ratio can be changed by conducting the hydrogen cyanide addition in the presence of an agent which forms a complex with the monosaccharide. ...
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WO/1989/003812A1 |
Compounds of formula (I): R1-(Ao)k-(Z1-A1)m-Zo-(E)n-(Q)o-(Z2-A2)p-R2 can be produced easily and in large quantities by transition metal catalysis from organotitanium compounds of formula (II): R1-(Ao)-(Z1-A1)m-Zo-Ti(Y)3 and compounds of ...
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WO/1988/010249A1 |
Crystallizable pyrethroid isomer or enantiomer pairs are converted to more pesticidally active isomers by contacting a hydrocarbon slurry of the starting isomers with a base and a catalyst, the catalyst being substantially soluble in the...
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WO/1988/003436A1 |
The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and primary, secondary ant tertiary silanes with Hg and U.V. light is enhanced by refluxin...
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WO/1988/002357A2 |
Compounds having formula (I): R1-(Ao)k-(Z1-A1)m-Zo-(E)n-(Q)o-(Z2-A2)p-R2, can be easily produced in high yields from organic zinc compounds having formula (II): R1-(Ao)k-(Z1-A1)m-Zo-ZnY and compounds having formula (III): X-(E)n-(Q)o-(Z2...
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WO/1987/005289A1 |
A biarylic coupling method, the ruthenium catalyst for its implementation and the new compound resulting therefrom. The biarylic coupling method according to the invention is characterized in that the biarylic precursors are cycled in th...
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WO/1987/003605A1 |
Oligomers are produced from unsaturated monomers. They contain terminal unsaturation and have a degree of polymerization of from 2 to 200. These oligomers are produced by the free radical polymerization of unsaturated monomers using as a...
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WO/1987/002030A1 |
A process for deoxidizing a hydroxy group of an alcohol having a secondary or tertiary hydroxy group. It comprises converting the hydroxy group into a substituted or unsubstituted benzoate derivative, then subjecting it to a photo cataly...
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WO/1985/005355A1 |
Process for the preparation of an aromatic hydrocarbon with a cyclobutene ring fused to the aromatic hydrocarbon which comprises, dissolving an ortho-alkyl halomethyl aromatic hydrocarbon in an inert solvent and pyrolyzing the solution o...
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WO/1983/003247A1 |
An indane, tetralin or phenyl alcohol is made by a heterogeneous, fast, exothermic Friedel Craft reaction and the reaction mixture is cooled to a temperature at which substantial by-product formation is avoided by continuously utilising ...
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