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7880038 Metal catalyst and its use  
A metal catalyst obtained by contacting (A) at least one metal or metal compound selected fromi) tungsten compounds composed of tungsten and an element of group IIIb, IVb, Vb, or VIb,ii) molybdenum...
7393982 Processes for preparing β-diketone compound, metal complex thereof and metallic compound  
Disclosed is a process for preparing a β-diketone compound such as 2,6-dimethyl-3,5-heptanedione, which comprises reacting an ester compound such as an alkyl isobutyrate with a ketone compound ...
7351867 Catalyst system for aerobic oxidation of primary and secondary alcohols  
The present invention relates to a process of oxidation of alcohols selectively to aldehydes or ketones with molecular oxygen using a TEMPO based catalyst, Fe-bipyridyl or Fe-phenantroline...
7351850 Process for producing alphaoxocarbonyl compound  
A process by which an α-oxocarbonyl compound useful as an intermediate for pharmaceuticals/agricultural chemicals can be industrially advantageously and efficiently produced in a high yield. The ...
7326798 Chiral heptyne derivatives for the preparation of epothilones and processes for their preparation  
The invention relates to a new synthetic process for the production of key intermediates useful in the synthesis of epothilones or epothilone derivatives, to certain compounds used to produce these...
7323603 Method for aldol reaction in water  
A method for aldol reaction in water, which comprises: reacting an aldehyde with a silyl enol ether in an aqueous medium in the presence of a boronic acid represented by the following general...
7084306 Process for preparing β-diketone compound and process for preparing metal complex thereof  
Disclosed is a process for preparing 2,2,6,6-tetramethyl-3,5-heptanedione, comprising reacting a pivalic acid alkyl ester with pinacolone in the presence of an alkali metal alkoxide catalyst using...
7060859 Use of a solid hydrotalcite structure incorporating fluorides for basic catalysis of Michael or Knoevenagel reactions  
The invention concerns the use of a solid basic catalyst comprising a hydrotalcite structure wherein part at least of the compensating anions are fluoride anions F− for producing Knoevenagel of M...
7030280 Process for producing optically active β-trifluoromethyl-β-hydroxycarbonyl compound  
The present invention provides a process for producing an optically active β-trifluoromethyl-β-hydroxycarbonyl compound represented by formula (3): comprising a step of reacting a fluoral e...
7015358 Process for the production of ketones  
A process for the production of aliphatic or alicyclic monoketones or alicyclic diketones of the formula R1—C(═O)—R2 in which R1 is a linear or branched C1-10-alkyl group and R2 is a linear or br...
6987203 Process for the preparation of phytone  
A process for the preparation of a novel intermediate compound useful in the preparation of phytone and vitamin E.
6969776 Process for producing fluorinated ketone  
The present invention provides a process whereby fluorinated ketones of various structures can be produced by short process steps and which is useful as an industrial production process. Namely, it...
6933413 Processes for preparation of hexafluoroacetone and its hydrate  
The present invention provides a process for the preparation of hexafluoroacetone characterized by bringing hexafluoro-1,2-epoxypropane into contact with at least one catalyst selected from the...
6872854 Complexes of metal salts of organic acids and beta-diketones and methods for producing same  
Metal salts of organic acids complexed with β-diketone compounds are multifunctional complexes useful in the formulation of stabilizers for halogenated resins. These complexes may be used jointly ...
6720456 Process for the preparation of 2,3-pentanedione  
The present invention relates to a novel process for the preparation of 2,3-pentanedione starting with hydroxyacetone and paraldehyde.
6703528 Process for producing carbonyl or hydroxy compound  
There are disclosed are a method for producing at least one compound selected from a carbonyl compound and a hydroxy adduct compound by an oxidative cleavage or addition reaction of an olefinic...
6639112 Method for preparing ketones by pyrogenic reaction of aldehydes, alcohols, acids or esters  
The invention concerns a method for preparing ketones of formula (I) wherein A and B are as defined in claim 1, consisting of reacting at a temperature ranging between 250 and 500° C. a compound ...
6433230 Process for conducting an aldol condensation  
α,β-Unsaturated keto compounds are prepared by base-catalyzed aldol condensation of aldehydes and/or ketones having from 1 to 15 carbon atoms, comprising: reacting the aldehydes and/or ketones w...
6410795 Process for base-promoted condensation reactions and base reagent therefor  
A method for the preparation of 1,3-diketones is disclosed wherein the method comprises the steps of: (A) mixing an alkali metal base with a hindered alcohol in an aromatic hydrocarbon solvent;(B)...
6329554 Continuous preparation of unsaturated ketones  
Process for the continuous preparation of unsaturated ketones of the formula I ##STR1## where the dashed line can be an additional C--C bond, R1 is an alkyl, and R2 is an aliphatic hydrocarbon...
6307106 Process for preparing unsaturated ketones  
An improved process for preparing lower unsaturated ketones by reacting the corresponding α,β-unsaturated alcohols with alkyl acetoacetates in a Carroll reaction in the presence of from 0.1 to 5 m...
6303823 Process for preparing ketones, in particular 6-methylheptan-2-one  
A process for preparing ketones by so-called "crossed aldol condensation" of a ketone with an aldehyde in the presence of a catalyst system consisting of approximately equimolar amounts of a...
6300524 Process for preparing higher unsaturated ketones  
The present invention relates to an improved process for preparing higher unsaturated ketones by reacting the corresponding α,β-unsaturated alcohols with alkyl acetoacetates in a Carroll reaction ,...
6143935 Process for the preparation of 1,3-dicarbonyl compounds  
The condensation reaction of a ketone with either an ester or a carbonate to form, respectively, a 1,3-diketone or a β-ketoester often affords poor results under the standard condensation reaction ...
6034279 Method for the production of γ, δ-unsaturated ketones by reacting tertiary allyl alcohols with alkenyl alkyl ethers  
An improved process is described for preparing γ,δ-unsaturated ke-tones, which are in demand as aroma substances and intermediates for vitamins and carotenoids, by reacting tertiary allyl a...
5925796 Method to de-couple methyl isobutyl ketone and diisobutyl ketone co-produced from acetone and/or isopropyl alcohol  
A method for the catalytic manufacture of MIBK and DIBK from DMK and/or IPA (optionally in the presence of water) while obtaining improved control over the ratio of DIBK to MIBK in the product...
5618982 Catalytic C-alkylation of ketones  
Ketones having at least one hydrogen atom or ester group in the α-position with respect to a ketonic carbonyl group thereof, for example cyclopentanone, 2-methylcyclopentanone and other ...
5434289 Process for producing optically active β-hydroxyketone  
A process for producing an optically active β-hydroxyketone represented by formula (I): ##STR1## by catalytic asymmetrical aldol reaction is disclosed, comprising reacting a silyl-enol ether ...
5354915 Catalysts for the reduction of carbonylic compounds to alcohols  
This invention provides an improved process for converting α,β-olefinically unsaturated aldehydic or ketonic compounds into the corresponding allylic alcohol using an alcohol as a hydrogen donor. T...
5276200 Method of preparing sodium formyl acetone and 4,4-dimethoxy-2-butanone  
The present invention provides a method of preparing sodium formyl acetone using acetone, methyl formate and sodium methoxide as raw materials. A mixture consisting of an acetone and a methyl...
5231232 Method of preparing C-18 ketones used in the manufacture of Vitamins E and K  
Methods of forming unsaturated C-18 ketones which can be used in the synthesis of Vitamins E and K1 are disclosed. One procedure involves coupling a C-9 primary allylic halide to a...
5159117 Preparation of α,α-dialkoxy ketones  
A process for preparing α,α-dialkoxy ketones of the formula I ##STR1## where R1 and R2 are each, independently of one another, hydrogen, C1 -C20 -alkyl, C3 -C20 -cycloalkyl, C4 -C30 -...
4980513 Process for making a hydrocarbyl vinyl ketone  
A process for making a hydrocarbyl vinyl ketone is disclosed. In this process a ketone having the structural formula CH3 COR, where R is lower alkyl, phenyl or C7 -C8 aralkyl, is reacted with...
4825008 Acetylketene dialkyl acetals and a process for their preparation  
The invention relates to a process for the preparation of acetylketene dialkyl acetals of the formula CH3 CO--CHC(OR2)2 in which R2 can be an alkyl radical with 1 to 12 carbon atoms, and also t...
4739122 Preparation of ketones  
A process to produce Methyl Amyl Ketone heterogeneously via the cross-aldol condensation reaction between a C3 (isopropanol or acetone feed) and a C4 (butanol or butyraldehyde feed). The catalyst,...
4727196 Production of higher carbonyl compounds from lower alcohols  
Higher carbonyl compounds are prepared from C1 to C8 cyclic or acyclic alcohols containing at least one active hydrogen atom bonded to the beta carbon atom or readily convertible thereto under the...
4704478 Process for the condensation of ketones  
Two ketone molecules (which can be the same or different) can be condensed together in the presence of hydrogen to produce a higher ketone by contacting the materials to be condensed with a...
4704480 Process for the production of ketones and carbinols  
A novel process is described for the production of aliphatic ketones and an optional consequetive production of the corresponding carbinols. The starting reactants comprise ketones or aldehydes or...
4701562 Process for the condensation of aldehydes  
Aldehydes can be condensed with ketones or aldehydes to produce higher aldehydes or ketones by contacting the materials to be condensed with a nonzeolitic molecular sieve. The condensation may be...
4618725 Preparation of α-methyl-substituted ketones  
α-Methyl-substituted ketones are prepared by reacting the corresponding unsubstituted ketones, which must possess two or more geminal hydrogen atoms in the α-position, with methanol in the gas p...
4562296 Production of aldehydes and ketones  
One or more aldehydes or ketones, or both, are produced by pyrolyzing an alcohol having at least two carbon atoms or an aldehyde having at least two carbon atoms, or both, over a Group VIII metal...
4504671 Method for preparing aldoxime or ketoxime-O-alkanoic acid  
Aldoxime or ketoxime-O-alkanoic acid is prepared by transoximation of an aldehyde or ketone, the reaction being conducted in a liquid phase at a pressure below one atmosphere. Conversion of the...
4504422 Process for producing an acetal  
An acetal is produced at a high yield and a high selectivity by contacting an olefin and an alcohol with each other in the presence of (a) a nitrite, (b) a platinum group metal or the salts thereof...
4476147 Flavoring of alliaceous-flavored foodstuffs  
A process for augmenting or enhancing the aroma or taste of alliaceous flavors, particularly garlic flavors, by augmenting or enhancing the garlic and green aroma and taste nuances of...
4468353 Method of preparing alkoxymethylene compounds  
An improvement in the alkoxylation of a compound having a reactive methylene group by contacting said compound with an orthoformic acid trialkyl ester in the presence of a catalyst, the improvement...
4421689 Derivatives of 1,5-dimethylbicyclo [3,2,1] octane, the preparation of these compounds and their use as perfume compound  
Derivative compounds of 1,5-dimethylbicyclo [3,2,1] octane of the general formula ##STR1## and perfume compositions containing these derivatives, wherein X represents a CO group, a ##STR2## g...
4385185 β-γ-Unsaturated ketones and isoprenoid 2,6 diones, a process for producing the same and their use as fragrant and flavoring substances  
Compounds of the general formula I: ##STR1## wherein R1 and R2 are equal or different alkyl-, alkoxyalkyl-, or aryl groups, or together form a ring; R3 is an allyl or benzyl radical; and R4 and R5...
4384145 Process for the preparation of pinacolone  
This invention relates to a new process for the preparation of pinacolone (2.2-dimethyl-3-oxobutane) of the formula (CH3)3 C--CO--CH3 (I),which process comprises reacting a 2-alkoxy-2-methylbutane...
4337277 Flavoring with 7-methyl-oct-3-en-2-one  
Process for the aromatization of various foodstuffs or beverages by means of 7-methyl-oct-3-en-2-one and foodstuffs, beverages or flavoring compositions containing this latter as organoleptically...
4330482 Process for the preparation of halogenoalkenes  
In the process for the production of a halogenoalkene of the formula ##STR1## in which R1 is an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl, aralkyl, aralkenyl or aryl...
Matches 1 - 50 out of 112 1 2 3 >