Class 568/427 - Isomerization

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein the compound is prepared by transformation
No. of patents: 27
Last issue date: 01/03/2012

Number	Title	Issue Date
8088954	Preparation of a saturated aldehyde The invention relates to a compound according to Formula (IX) and salts thereof, wherein R1, R2 and R5 are each independently selected from H and hydrocarbon moieties, which hydrocarbon moieties optionally comprise one or more hetero...	01/03/2012
6909019	Process for preparing aldehydes A process is disclosed for preparing aldehydes by isomerization of the corresponding unsaturated primary alcohols using a transition metal catalyst system, in an alcoholic solvent and in the presence of an acid. An aldehyde forms by isomerizing an unsaturated primar...	06/21/2005
5770775	Method for preparing 3,3-dimethylbutyraldehyde A method is disclosed for preparing 3,3-dimethylbutyraldehyde by isomerization of 3,3-dimethylepoxybutane with a basic lithium salt which in turn may be prepared by oxidation of dimethylbutane. The method provides an economical means of preparing 3,3-dime...	06/23/1998
5502257	Process for the production of cyclopropanecarboxaldehyde Disclosed is a process for the preparation of cyclopropanecarboxaldehyde by the thermal isomerization of 2,3-dihydrofuran under superatmospheric pressure, e.g., at a temperature of about 300° to 600° C. and a pressure of about 3 to 345 bars absolute....	03/26/1996
5481044	Process for the preparation of ଱-alkyl substituted aldehydes ଱-alkyl aldehydes having 8 to 17 carbon atoms are obtained from terminal olefins containing one less carbon atom. The olefins are first isomerized in the presence of iron carbonyl and then, without separating out the iron compound, hydroformylated i...	01/02/1996
5430194	Process for improving enantiomeric purity of aldehydes The present invention relates to a process for producing an optically active aldehyde (first aldehyde) containing a reduced amount of the corresponding enantiomeric aldehyde (second aldehyde) which process comprises: (1) providing an initial solution cont...	07/04/1995
5312995	Process for isomerizing epoxides to aldehydes A process for isomerizing epoxides to aldehydes is disclosed. The process uses a metal-exchanged zeolite catalyst wherein the zeolite contains an alkali metal and one or more second exchangeable metals from Group IIA, IB, IIB, or IIIB. The catalysts are e...	05/17/1994
5245041	Preparation of heterocyclic-cyclohexanedione derivatives A process for the preparation of cyclohexanedione derivatives of the general formula I ##STR1## where R1 is C2 -C8 -alkyl, C2 -C8 -alkenyl, C3 -C12 -cycloalkyl, C5	09/14/1993
5225602	Phenylacetaldehydes and the preparation of phenylacetaldehydes Phenylacetaldehydes of the structure (I) ##STR1## where the substituents X are 2,4-dichloro, difluoro, trifluoro, tetrafluoro, p-trifluoromethyl, 2-methyl-4-fluoro, haloalkoxy or haloalkylthio radicals or are adjacent Cl, F, CF3, alkyl, al...	07/06/1993
5012005	Conversion of 1,3-dioxanes to 4-oxaaldehydes 4-oxaaldehydes of the formula ##STR1## are prepared by catalytic isomerization of 1,3-dioxanes by a process in which a 1,3-dioxane of the formula ##STR2## where R1, R2, R4 and R5 are identical or diffe...	04/30/1991
4996365	Preparation of alkyl-substituted cinnamaldehydes Alkyl-substituted cinnamaldehydes of the formula I ##STR1## where one or more of R1 , R2 and R3 is alkyl of from 1 to 8 carbon atoms, preferably of from 1 to 4 carbon atoms, and non-alkyl R1, R2 ...	02/26/1991
4980511	Preparation of aldehydes and/or ketones BU conversion of epoxides Aldehydes and ketones are prepared from epoxides of the formula ##STR1## where R1 and R2 are each alkyl, alkenyl, aryl, alkoxy or aralkyl and R3 has the same meanings or is hydrogen, by a catalytic rearrangement react...	12/25/1990
4929765	Preparation of phenylacetaldehydes Phenylacetaldehydes of the general formula I ##STR1## where R1 to R5 are each independently of the others hydrogen, alkyl, alkoxy, halogen, haloalkyl, haloalkoxy or haloalkylthio, by catalytic rearrangement in the presence of a ...	05/29/1990
4749814	Process for the preparation of ethylenic carbonyl compounds Ethylenic carbonyl compounds of formula ##STR1## are made by the isomerization of acetylenic alcohols of formula ##STR2## in the presence of a catalyst consisting of a titanium derivative, a copper or silver derivative, and, if required, an acid...	06/07/1988
4749815	Process for the manufacture of p-tert-butyl-alpha-methyl-hydrocinnamaldehyde A process for the manufacture of p-tert-butyl-଱-methylhydrocinnamaldehyde which comprises the catalytic rearrangement of p-tert-butylbenzyl propenyl ether is provided....	06/07/1988
4709097	Conversion of 1,3-dioxanes to 4-oxa-aldehydes 4-oxa-aldehydes are prepared by catalytic isomerization of a 1,3-dioxane using an acidic zeolite catalyst....	11/24/1987
4670607	Method for producing 2-(substituted aryl) propionaldehyde A 2-(substituted aryl)propionaldehyde of the formula, ##STR1## (wherein Ar denotes ##STR2## is produced in high yield by reacting a methyl (substituted aryl) ketone of the formula ##STR3## with phenyldimethylsulfonium methylsulfate of ...	06/02/1987
4650908	Production of arylacetaldehydes This invention relates to the isomerization of monoaryl-ethylene oxide in the presence of water over a silica gel catalyst. Reaction temperatures are relatively low, i.e., 160° C. to about 180° C....	03/17/1987
4621150	Catalyst and method for isomerization A catalyst for isomerization consisting essentially of a salt or complex salt represented by the formula: where M is a metal of Group IB, IIA, IIB or VIII of the periodic table, L is a ligand, Y is a conjugated base of a Bronsted acid, m is 0, 1, 2, 3 or ...	11/04/1986
4593130	Synthesis of 10-hydroxymethyl-9-anthraldehyde This disclosure describes the catalyzed rearrangement of trans-dispiro (oxirane-2,9-(10'H)-anthracene)-10',2"-oxirane to 10-hydroxymethyl-9-anthraldehyde....	06/03/1986
4495371	Process for isomerizing styrene oxide or homologues to ଲ-phenylaldehydes A process for isomerizing styrene or homologues to ଲ-phenylaldehydes, consisting of conducting the isomerization reaction in the presence of a catalyst constituted by synthetic zeolites containing titanium, of formula where x lies between 0.0001 and 0.04...	01/22/1985
4324921	Process for the manufacture of ethers of hydroxy-pivalaldehyde Ethers of the hydroxypivalaldehyde RCH2 OCH2 C(CH3)2 CHO are prepared by a catalytic isomerization of 5,5-dimethyl-1,3-dioxans at 250° to 500° C. The catalyst is obtained by way of calcination from silicon dio...	04/13/1982
4310709	Manufacture of but-2-en-1-ol compounds by isomerizing the corresponding but-3-en-1-ol compounds The process for the manufacture of but-2-en-1-ol compounds by isomerizing but-3-en-1-ol compounds in the presence of a palladium catalyst and of hydrogen is improved by modifying the palladium catalyst with selenium or tellurium. The but-2-en-1-ols manufa...	01/12/1982
4145366	Process for isomerizing one of the geometric isomers of an ଱,ଲ-unsaturated aldehyde to its corresponding other geometric isomer Process for preparing a trans-଱,ଲ-unsaturated aldehyde or a cis-଱,ଲ-unsaturated aldehyde at high conversions and selectivities, which comprises isomerizing a cis-଱,ଲ-unsaturated aldehyde to its corresponding trans-...	03/20/1979
4124643	Preparation of 3-fluorosalicylaldehyde 3-Fluorosalicylaldehyde may be prepared in a more economical manner by alkylating o-fluorophenol with an allyl halide such as allyl chloride, thereafter rearranging the resultant o-fluorophenyl allyl ether to form allyl-o-fluorophenol. The latter compound...	11/07/1978
4028278	Cycloaliphatic unsaturated ketones as fragrance modifying agents New cycloaliphatic unsaturated ketones and their use as perfuming and odor-modifying agents in the manufacture of perfumes and perfumed products, and as flavoring and taste-modifying agents in the preparation of foodstuffs in general and imitation flavors...	06/07/1977
3976684	1-Succinoyl-2,4-disubstituted-4b,5,6,7,8,8a,9,10-octahydro-9-oxo-ph enanthrenes and compositions and methods for treating lipodemia 1-succinoyl-2,4-disubstituted-4b,5,6,7,8,8a,9,10-octahydro-9-oxo-phenanthre nes, e.g., 1-succinoyl-2,4-dimethoxy-4b,5,6,7,8,8a,9,10-octahydro-9-oxo-phenanthrene are prepared by treating a corresponding 2,4-dimethoxy-4b,5,6,7,8,8a,9,10-octahydro-9-oxo-...	08/24/1976

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Class 568/427 - Isomerization