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WO/1993/023388A1 |
A synthesis is described for intermediates which are readily amenable to the large scale preparation of hydroxyethylurea-based chiral HIV protease inhibitors. The method includes forming a diastereoselective epoxide compound of formula (...
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WO/1993/023394A1 |
The object of the present invention is a process for producing optically pure S-timolol or its derivatives wherein racemic R,S-timolol, or its racemic derivative, at elevated pressure and dissolved in carbon dioxide is periodically fed t...
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WO/1993/023387A1 |
A process for producing an epoxide represented by general formula (1a) or (1b), which comprises reacting an olefin represented by general formula (2) with a compound containing iodine and an acyloxy ion and treating the reaction product ...
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WO/1993/021765A1 |
A process for producing a stable, bactericidal and fungicidal composition which consists essentially of bubbling air or oxygen into limonene, to produce an oxidized limonene having a rapid bactericidal activity as evidenced by the capabi...
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WO/1993/017671A1 |
Aromatic compounds, or prodrugs thereof, which contain an alkylating site and which are capable of alkylating the thiol group in N-acetyl-L-cysteine, in particular bis-aromatic $g(a),$g(b)-unsaturated ketones, are used for the preparatio...
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WO/1993/012101A1 |
Disclosed is a novel process for the preparation of epoxyalkanes and epoxycycloalkanes which comprises hydrogenating gamma,delta-epoxyalkenes or gamma,delta-epoxycycloalkenes in the presence of a rhodium catalyst. The process is especial...
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WO/1993/007133A1 |
Disclosed are processes for the manufacture of 3,4-epoxy-1-butene (EpB) and, particularly, for the recovery of EpB from an epoxidation effluent comprising EpB, butadiene, oxygen and an inert gas obtained by the selective epoxidation of b...
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WO/1993/005030A1 |
Disclosed is a process for the preparation of 3,4-dichloro- and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butane with chlorine or bromine in the presence of a quaternary ammonium or phosphonium halide compound. The react...
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WO/1993/003838A1 |
Chiral catalysts for enantioselectively epoxidizing a prochiral olefin and for enantioselectively oxidizing a prochiral sulfide are disclosed, together with methods of using such catalysts. In accordance with one aspect of the invention,...
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WO/1993/003024A1 |
Disclosed is a process for the selective epoxidation of olefins, including diolefins, having more than 2 carbon atoms by the catalytic oxidation of such an olefin in the presence of a supported, thallium-promoted, silver catalyst.
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WO/1993/003023A1 |
There is provided a process for the non-catalytic oxidation of gaseous hydrocarbons, preferably propylene. A mixture of propylene (22), oxygen (24) and an inert diluent (26) provided to a reactor vessel (10) capable of maintaining an iso...
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WO/1993/003065A1 |
A loop reactor for the oxidation of hydrocarbons, such as propylene, has at least one reaction tube (18) immersed in a thermal transfer medium (42). The thermal transfer medium (42) is preferably a pressurized liquid (51) such as water (...
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WO/1993/002084A1 |
A process for the production of ambergris-type labdane spiroketals of general formulae (I) and (II), where R represents oxygen or sulphur, useful in the perfumery industry, the said process being characterized by the intramolecular cycli...
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WO/1993/002034A1 |
Enantiomer-free compounds having the formula (I) are disclosed, in which the substituents R?1¿, R?2¿ and R?3¿ have the meaning described in the claims, as well as a process for preparing the same and their use for producing enantiomer...
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WO/1993/000338A2 |
Alkenes can be epoxidised with hydrogen peroxide using a homogeneous heavy metal catalyst, but discharge of spent reaction mixtures releases the heavy metal in the environment. The problem can be ameliorated by selecting a heterogeneous ...
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WO/1992/018491A1 |
A process for producing an epoxy derivative represented by general formula (II) wherein A represents a C10 to C18 hydrocarbon chain having 2 to 6 unsaturated bonds, and R represents hydrogen, C1 to C8 alkyl or optionally substituted aryl...
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WO/1992/017468A1 |
A pyridine derivative represented by general formula (I), a process for producing the same, and a herbicide comprising the same. In formula (I) W represents oxygen, sulfur, NH or N-C(O)B wherein B represents hydrogen or alkoxy; and Z rep...
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WO/1992/014703A1 |
A process for transforming a carbonyl compound into its corresponding epoxide, which comprises contacting the carbonyl compound with either trimethylsulphonium hydrogen sulphate and/or bis(trimethylsulphonium) sulphate or trimethylsulpho...
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WO/1992/014731A1 |
A compound of formula (I), the racemic mixture, the (S)-form and the acid addition salts thereof, said compound having anti-stroke properties. Pharmaceutical compositions containing this compound as active ingredient and a method of prep...
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WO/1992/009588A1 |
Described herein is a process for preparing propylene oxide characterized by reacting propylene with oxygen and/or an oxygen containing gas in a reactor at a temperature of from about 100 to about 300 °C provided by an external heating ...
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WO/1992/001510A1 |
Disclosed is a novel catalyst composition comprising a catalyst support material having deposited thereon elemental silver and a promoter selected from potassium, rubidium and cesium which are obtained by treating a catalyst precursor co...
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WO/1991/019705A1 |
A gas stream from a reaction in which ethylene oxide is produced by reacting ethylene with oxygen which gas stream comprises oxides of nitrogen and steam the gas stream is cooled to condense water, condensed water is removed, and ethylen...
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WO/1991/019706A1 |
A gas stream from a reaction in which ethylene oxide is produced by reacting ethylene with oxygen which gas stream comprises oxides of nitrogen and steam the gas stream is contacted with an aqueous alkaline quench solution and ethylene o...
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WO/1991/014694A1 |
Chiral catalysts for enantioselectively epoxidizing a prochiral olefin are disclosed, together with methods of using such catalysts. In accordance with one aspect of the invention, the catalyst is a salen derivative which has general str...
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WO/1991/013066A2 |
Method for the preparation of beta-phenylglycidic-(2R,3R) acid optionally in the form of salt or ester by precipitation of the salt of the beta-phenylglycidic-(2R,3R) acid with (+)-alpha-methylbenzylamine-(R) in a solution of a mixture o...
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WO/1991/012248A1 |
A composition comprising a compound of general formula (I), which is useful as the raw material of resins used in coating material, adhesive, epoxy resin, etc., and a modifier, wherein x is an integer of 3 to 7, y is an integer of 0 to 5...
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WO/1991/009828A1 |
A method is disclosed for separating impurity components, UV absorbers and/or UV absorber precursors contained in an ethylene glycol-water stream thereby desirably allowing the recovery of the glycols contained in such stream in an econo...
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WO/1991/009010A2 |
Fluorinated (poly)sulfates, halosulfonates, halohydrins and epoxides, as well as processes for producing them are disclosed. These compounds have the formulas R2R3FCCHXCHR1(OSO2)nZ, wherein each R2 and R3 is independently fluorine or per...
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WO/1991/005778A1 |
The synthesis of epoxides from fluorine containing olefins using elemental fluorine in mixtures of water and acetonitrile is disclosed.
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WO/1991/004333A1 |
A process for the preparation of a peroxycarboxylic acid of general formula (I), wherein R is an organic residue, in particular a linear or branched alkyled group, an aryl group or an alkyl aryl group each of which is optionally substitu...
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WO/1991/001980A2 |
In a process for preparing plastics comonomers and plastics from raw fats and oils containing unsaturated fatty acids, raw unsaturated fats and oils are oxidized with performic acid or peracetic acid to epoxy or hydroxy compounds. To pre...
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WO/1990/015053A1 |
A two phase process for the oxidation of olefins to produce alkylene oxides in increased yields while reducing or substantially eliminating the formation of aldehydes and producing, in place thereof, more desirable carboxylic acids. The ...
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WO/1990/015054A1 |
A continuous process for the vapor phase oxidation of an alkane or olefin in molten salt catalyst to produce alkylene oxides in increased yields while reducing or substantially eliminating the formation of aldehyde by-products. The proce...
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WO/1990/011279A1 |
Process is disclosed for the selective epoxidation of bicyclic olefins. Such olefins are contacted with an oxygen-containing gas in the presence of a silver catalyst under defined reaction conditions, thereby selectively producing epoxid...
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WO/1990/007506A1 |
This invention relates to a method for producing a glycidyl ether of general formula (I), wherein A is an optionally substituted aryl or heteroaryl group and the asterisked carbon atom represents an asymmetric carbon atom, comprising rea...
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WO/1990/005726A1 |
Process is disclosed for the selective monoepoxidation of styrene, styrene analogs, and styrene derivatives. Such compounds are contacted with an oxygen-containing gas in the presence of a promoted, optionally supported silver catalyst u...
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WO/1989/010350A1 |
Accordingly we provide a stereoselective process for preparation of an epoxide of formula (I), wherein Ar is selected from the group consisting of aryl, heteroaryl, substituted aryl and substituted heteroaryl, and R is a carboxylic acid ...
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WO/1989/007101A1 |
Process is disclosed for the selective epoxidation of olefins having no allylic hydrogens. Such olefins are contacted with an oxygen-containing gas in the presence of a silver catalyst and an organic halide under defined reaction conditi...
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WO/1988/008845A1 |
Diastereomeric 5R,6S-6-(1R-hydroxyethyl)-2-(1S-oxo-3R-thiolanylthio)-2-pene
m-3-carboxylic acid and 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio)-2-pene
m-3-carboxylic acid, and pharmaceutically-acceptable salts and in vivo hydro...
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WO/1988/007988A1 |
Disclosed are tetraphenyl porphyrins which are beta-substituted by fluoro or chloro and/or bear electronegative substituents on the phenyl including one or two water solubilizing substituents. The new porphorins are particularly suitable...
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WO/1986/001799A1 |
A novel sequence of highly selective chemical reactions for conversion of 3-Aryl-2-propyn-1-ols into cis-1-Aryl-3-fluoro-1-propene and into D,L-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanols. Preparation of D-(threo)-1-Aryl-2-acylamido-...
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WO/1985/000611A1 |
Epoxy resin which results from dehydrogenating the reaction product of an excess of at least one epihalohydrin with at least one phosphoramide compound represented by formula (I), wherein each R is independently hydrogen or a hydrocarbyl...
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WO/1984/004920A1 |
In a multi-step process of continuous epoxidation of double bonds of olefins positioned at the center or at the end of the chain, comprising more than 12 atoms of carbon, unsaturated fatty acids and esters thereof, as well as unsaturated...
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WO/1984/000748A1 |
A high efficiency process for removal and detoxification of olefin oxides from gas compositions. The process consists of olefin oxide absorption at ambient pressure in an absorber using an aqueous liquid as the absorbing medium and subse...
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WO/1983/000513A1 |
New compounds having the formula:$(10,)$wherein R1 is an alkyl group having 1 or 2 atoms of carbon, R2 is a linear alkyl group having 1 or 2, or from 12 to 16 atoms of carbon, R3 and R4 are each a chlorine or hydrogen atom,$(4,) an anion...
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JP2024055302A |
An object of the present invention is to provide a novel method and apparatus for producing hexafluoropropylene oxide, which can synthesize HFPO more cheaply and safely using a tubular reaction vessel (flow reactor). [Solution] Hexafluor...
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JP2024055301A |
[Challenges] (1) HFPO can be synthesized continuously, (2) Oxygen is used as an oxidizing agent, (3) The process is simple, (4) It is safe, (5) Impact on the global environment To provide a method and apparatus for producing hexafluoropr...
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JP2024054625A |
The present invention provides a method and apparatus capable of continuously producing hexafluoropropylene oxide through a simple process while suppressing increases in production costs. [Solution] Gaseous hexafluoropropene and oxygen g...
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JP2024515128A |
A polyfunctional epoxy compound obtained by modifying the end portion of a liquid crystal molecule synthesized by combining multiple thermotropic liquid crystal substances with two or more epoxide functional groups, and a polyfunctional ...
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JP2024514571A |
A method for maximizing the selectivity (S) of an epoxidation catalyst in an ethylene oxide reactor system, comprising: converting a feed gas containing ethylene and oxygen to ethylene oxide in the presence of an epoxidation catalyst and...
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