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7465838 |
Chiral diols, their manufacture and ligands and catalysts derived therefrom
The present invention relates to a method for the preparation of C 2 -symmetric 1,4-diols of the formula IVA or IVB, wherein ring A, R 1 and R 2 have the meanings given in the specification, that...
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7393985 |
Supported ruthenium nanoparticle catalyst for cis -dihydroxylation and oxidative cleavage of alkenes
The present invention relates to the use of nanosized metal particles (e.g., ruthenium) grafted on inert solid support for oxidation of alkenes. The supported metal catalyst can effect...
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7312366 |
Preparation of one intermediate for pyrethroids
Methods for preparing 2,3,5,6-tetrafluorodimethylolbenzene, an intermediate for the preparation of pyrethroids, are disclosed. A method for preparing 2,3,5,6-tetrafluorodimethylolbenzene includes...
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7247758 |
Method for producing 2,3,6,7,10,11-hexahydroxytriphenylene
The present invention provides a simple and efficient method for producing high-purity 2,3,6,7,10,11-hexahydroxytriphenylene on an industrial scale. The method for producing...
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7244772 |
Process for preparing polyurethane polyol and rigid foams therefrom
We describe a process for the preparation of polyurethane polyol from CARDANOL 3-(8pentadecenyl)phenol, derived from cashew nut shell liquid (CNSL), a renewable resource material. The polyol is...
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7132294 |
Functionalized small molecules for use in chemical sensors
The invention provides a device for selective molecular recognition, the device comprising a sensing portion, wherein said sensing portion includes a substrate having coated thereon a layer...
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7060861 |
Method for hydrating poly-or monomethylol alkanals
In a process for the catalytic hydrogenation of a polymethylolalkanal or a monomethylolalkanal of the formula (I)
where R may be identical or different and are each a substituted or...
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7002047 |
Biocatalytic synthesis of quinic acid and conversion to hydroquinone
A bioengineered synthesis scheme for the production of quinic acid from a carbon source is provided. Methods of producing quinic acid from a carbon source based on the synthesis scheme as well as...
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6946566 |
Process for preparation of optically active halogeno hydroxypropyl compound and glycidyl compound
A process for preparing regioselectively an optically active 1-halogeno-2-hydroxypropyl compound of the following formula;
wherein X is halogen atom and Nu is a heteroatom having a...
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6943271 |
Process for producing fluorine-containing, polymerizable styrene monomer and intermediates used in same
A fluorine-containing styrene monomer of the formula (2) is produced by a first, second or third process. The first process includes (a) reacting a compound of the formula (1) with a compound of...
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6924400 |
Triaromatic vitamin D analogues
The invention relates, as novel and useful industrial products, to triaromatic compounds, which are vitamin D analogues, of general formula (I):
and also to a method for preparing them and to...
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6916963 |
Process using water tolerant Lewis acids in catalytic hydration of alkylene oxides to alkylene glycols
Water tolerant Lewis acids are used in a process for the preparation of alkylene glycols by catalytic hydration of the corresponding alkylene oxide. The water tolerant Lewis acids can be a metal...
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6852874 |
Second cycle asymmetric dihydroxylation reaction
A process for catalyzing asymmetric dihydroxylations of olefins employs an Os(VI) complex as a catalytic intermediate in the formation of chiral vicinal diol products. The process requires a chiral...
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6815566 |
Supported osmates, process for preparation thereof, and a process for the preparation of chiral vicinal diols using supported osmate catalyst
The present invention provides a supported osmate useful as a reusable catalyst in the preparation of vicinal diols. The present invention also relates to a process for the preparation of supported...
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6780810 |
MULTIFUNCTIONAL CATALYST USEFUL IN THE SYNTHESIS OF CHIRAL VICINAL DIOLS AND PROCESS FOR THE PREPARATION THEREOF, AND PROCESS FOR THE PREPARATION OF CHIRAL VICINAL DIOLS USING SAID MULTIFUNCTIONAL CATALYSTS
The present invention relates to a multifunctional reusable catalyst and to a process for the preparation thereof on a single matrix of the support to perform multicomponent reaction in a single...
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6765118 |
Method for the production of alcohols on rhenium-containing activated charcoal supported catalysts
In a process for the preparation of alcohols by catalytic hydrogenation of carbonyl compounds, the catalyst used is 0.01 to 50% by weight of rhenium and 0 to 20% by weight, in each case based on...
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6759558 |
Process for preparing halogen-substituted dibenzyl alcohols, these halogen-substituted dibenzyl alcohols and their use
A novel process allows a simple preparation of highly pure halogen-substituted dibenzyl alcohols by reduction of the corresponding halogen-substituted terephthalic acids and reaction with an...
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6753444 |
Method for producing 2,3,5,6-tetrahalogen-xylyidene compounds
The invention relates to a process for preparing 2,3,5,6-tetrahaloxylylidene compounds of formula (I) where each Hal is independently fluorine or chlorine, and X is fluorine, chlorine, bromine,...
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6703531 |
Process for the preparation of supported osmates
The present invention discloses a process for the preparation of a novel heterogeneous osmate catalyst of the general formula (S—NR 3 ) 2 OsO 4 .nH 2 O wherein S is a support, R is an alkyl...
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6624336 |
Process for producing tetrafluorobenzenemethanols
The present invention relates to a process by a series of reactions using tetrafluorocyanobenzens as material for producing tetrafluorobenzenemethanols, tetrafluorobenzenecarbaldehyde...
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6528538 |
Cyclic compounds useful in the treatment of dyslipidaemia, atherosclerosis and diabetes, pharamaceutical compositions and preparation process
The present invention relates to cyclic compounds which are of the class of compounds of formula I wherein X and Y represent an oxygen atom and to processes for preparing such compounds. The...
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6472570 |
Method for the asymmetric dihydroxylation of olefins, using osmium catalysts
This invention relates to process for asymmetric dihydroxylation of olefins using osmium catalysts to obtain monofunctional, bifunctional, and/or polyfunctional chiral 1,2-diols of the formula (I) ...
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6372921 |
Process for producing isochromanones and intermediates thereof
(1) Methods for producing isochromanone compounds from o-xylene compounds as starting compounds through α-halogeno-o-xylene derivatives, α-cyano-o-xylene derivatives, and...
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6271425 |
Process for producing alcohols
A novel process for producing alcohols, characterized by reacting an organic halide represented by the formula R--X (wherein R means an organic residue and X means a halogen atom) with oxygen...
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6225500 |
Method for the cyclotrimerization of alkynes in aqueous solutions
This invention discloses an improved method for the [2+2+2] cyclotrimerization reaction in aqueous solutions using a water soluble transition metal catalyst.
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6197994 |
Silica gel supported bis-cinchona alkaloid derivatives and a preparation method and use thereof
The present invention relates to silica gel supported bis-cinchona alkaloid compounds of the formula: ##STR1## wherein Q is dihydroquininyl or dihydroquinindinyl; X is a compound having 4 carbon...
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6090974 |
Alkyl 3-oxoalkanoate and process for the preparation thereof
This invention includes an alkyl 3-oxoalkanoate, and processes for its preparation and use for the synthesis of fatty hydroxylated amino acids, fatty amino alcohols and ceramides.
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5895824 |
Preparation of polyether polyols containing aromatics
In a process for preparing polyether polyols containing aromatics by molecular addition of alkylene oxides to H-functional initiators at from 70° C. to 135° C. and pressures of from 0.1 MPa to...
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5834606 |
Synthesis of conduritol epoxides and aziridines and methods of using such to synthesize higher disaccharides
There are described novel coupling reactions useful for the preparation of cyclitol and/or carbohydrate conjugates and carbocyclic analogs thereof. Such coupling reactions employ epoxides and/or...
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5792876 |
Process for producing acetals
A process is described for producing acetals comprising reacting an aldehyde or a ketone with an alcohol in the presence of a titanium compound having an acetylacetone as a ligand, or in the...
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5731479 |
Process for the preparation of optically active alcohols
Optically active alcohols are prepared by reducing optically active carboxylic acids with hydrogen in the presence of ruthenium catalysts.
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5728796 |
Process to react epoxide-containing compounds and aliphatic alcohols
A process reaction between: (1) a compound that contains one or more epoxide moieties per molecule, and (2) a compound that contains one or more primary aliphatic hydroxyl groups per molecule; is...
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5698733 |
Use of 9-deoxy prostaglandin derivatives to treat glaucoma
Disclosed are 9-deoxyprostaglandins which are useful in the treatment of glaucoma and ocular hypertension. Some of these 9-deoxyprostaglandins are novel. Also disclosed are ophthalmic,...
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5663453 |
Dioxolane derivatives
Compounds of the formula ##STR1## in which: n is 0, 1 or 2, and, if n is 2, the two radicals R 3 are identical or different; R 2 is methyl, fluorine, chlorine or bromine; R 3 is C 1 -C 3 ...
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5516929 |
Method for catalytic asymmetric dihydroxylation of olefins using heterocyclic chiral ligands
Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an...
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5478789 |
Hydrogenation reaction catalyst precursor, process for production thereof and process for production of alcohol
A hydrogenation reaction catalyst precursor of the present invention comprises a catalyst carrier (A) and a metal oxide composition (B) carried on or mixed with the catalyst carrier (A) at a weight...
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5426206 |
Stereospecific synthesis of aldols
Methods are provided for preparing all four diastereomers of 2-alkyl-3-hydroxyalkanals, 2-alkyl-3-silyloxyalkanals, and the like, with high enantiocontrol, using non-aldol chemistry. The synthetic...
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5395985 |
Compound and separating agent
A compound represented by the general formula (I) and a separating agent comprising the same: ##STR1## wherein Ar and Ar' are each an aromatic group; and the positional relationship of the two...
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5395984 |
Process for preparing 2-phenyl-1,3-propanediol
Described is a process for preparing 2-phenyl-1,3-propanediol by converting the 2-nitro-2-phenyl-1,3-propanediol to a nitro-dioxane of the formula ##STR1## wherein the groups R are both C 1 -C 6 ...
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5395983 |
Process for producing 1-phenyl-1,3-propanediols having high optical purtiy
R or S-1-phenyl-1,3-propanediols having optical purity of 100% ee were obtained by recrystallization of R or S-1-phenyl-1,3-propanediols having optical purity of 20% ee to below 100% ee, the last...
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5393776 |
Tocotrienol analogs in the treatment of hypercholesterolemia and hyperlipidemia
This invention relates to structurally novel acyclic tocotrienol analogs, which are useful for cholesterol/lipid lowering in cases of hypercholesterolemia and hyperlipidemia, and for...
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5364993 |
Selective functionalization of fullerenes
Fullerenes are selectively functionalized by adsorbing fullerene molecules on molecular sieves such as zeolites as the first step in a desired functionalizing reaction and then adding functional...
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5342903 |
Process for the preparation of adducts of epoxides and alcohols
A process for the preparation of adducts by reacting an alcohol with an epoxy compound in the presence of a catalyst, which comprises reacting an alcohol of formula I ##STR1## wherein A is an...
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5306846 |
Synthesis of cyclitols from substituted arene diols
There are disclosed novel processes for the synthesis of novel intermediates useful in the of further synthesis of cyclitols and derivatives thereof.
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5284982 |
Method for the cyclooligomerization of 3-hydroxy-1 alkynes
The invention relates to a method of cyclooligomerization of 3-hydroxy-1-alkynes having 4-20 C atoms, particularly cyclooligomerization of 3-methyl-1-butyne-3-ol to yield...
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5260495 |
Monoalkylene glycol production using highly selective monoalkylene glycol catalysts
The invention relates to highly selective, heterogeneous hydrotalcite-type catalysts for the production of monoalkylene glycol by hydrolysis of the corresponding alkylene oxide. The invention also...
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5260461 |
Ligands for ADH: cinchona alkaloids and moderately sized organic substituents linked through a planar aromatic spacer group
Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, an aqueous...
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5250744 |
Process for the preparation of 2-aryl-1,3-propanediols
Process for the production of 2-aryl-1,3-propanediols and novel intermediate compounds produced thereby.
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5227543 |
Facilitation of turnover in the ADH by additives which catalyze the hydrolysis of the OS(VI) glycolate esters
Osmium-catalyzed methods of addition to an olefin are discussed. In the method of asymmetric dihydroxylation of the present invention, an olefin, a chiral ligand, an organic solvent, water, an...
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5227537 |
Method for the production of 6,12-dihydro-6-hydroxy-cannabidiol and the use thereof for the production of trans-delta-9-tetrahydrocannabinol
A method is described for the production of 6,12-dihydro-6-hydroxy-cannabidiol which is obtained by the reaction of olivetol and cis-p-menth-2-ene-1,8,-diol and the reaction thereof to yield...
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