Class 568/691 - Preparing from an acetal or ketal

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes which include preparing the compound by reacting
No. of patents: 26
Last issue date: 06/01/2010

Number	Title	Issue Date
7728181	Method for producing α, β-unsaturated ether Disclosed is a method for producing an α,β-unsaturated ether efficiently and stably for a long time. In the method for producing an α,β-unsaturated ether, an acetal is thermally decomposed in the presence of a catalyst containing an apatite represented by any of...	06/01/2010
7208640	Process for isolating highly pure 2-methoxypropene A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, addin...	04/24/2007
7175871	Acyclic enol ethers, isomers thereof, organoleptic uses thereof and processes for preparing same Described are synthetically produced substantially pure enol ether compositions which are cis and/or trans isomers of enol ethers having the structures: wherein R1 is C4–C10 str...	02/13/2007
7074304	Process for purifying alicyclic alcohols A process for purifying alicyclic alcohols by distillation, wherein the alicyclic alcohols are distilled in the presence of from 1 to 550 ppm of acidic compounds. ...	07/11/2006
6660890	Production of optically active ଱-hydroxyacetals A process for the heterogeneous and enantioselective hydrogenation of prochiral organic ଱-keto compounds with platinum as the catalyst in the presence of a soluble or immobilized chiral aromatic nitrogen base with at least one basic nitrogen atom ad...	12/09/2003
6566559	Process for the production of isopropenyl methyl ether Process for the production of unsaturated ethers, in particular isopropenyl methyl ether (IPM), by pyrolysis of a ketal-containing or acetal-containing mixture, in particular dimethoxypropane (DMP), in the liquid phase in the presence of an organic carbox...	05/20/2003
6235944	Production of secondaryalkoxy-1-alkenes The present invention relates to a general synthesis for producing secondaryalkoxy-1-alkenes in commercial quantities in good yields by reacting cyclic and acyclic ketones and the corresponding alcohol with a secondary alkyl orthoformate ester in the pres...	05/22/2001
6211416	Method for producing enol ethers Enol ethers of the formula I ##STR1## where R1 is an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical which may carry further substituents which do not react with acetylenes or allenes, and the radicals R, independently ...	04/03/2001
5990360	Process for the catalytic dealkoxylation of 1,1,3-trialkoxy-2-methyl-butane A novel process for the manufacture of a γ-halotiglic aldehyde HalH2 C-CH.dbd.C(CH3)-CHO [I], wherein Hal signifies chlorine or bromine, comprises haloalkoxylating a 1-alkoxy-2-methyl-1,3-butadiene H2 C.dbd.CH-C (CH3...	11/23/1999
5767325	Preparation of enol ethers A process for the preparation of enol ethers of the general formula I ##STR1## in which R1,R2,R3,R4,R5 denote C1 -C20 alkyl, C1 -C20 alkenyl, or C7	06/16/1998
5723687	Process for the joint production of ethers and hydrocarbons with a high octane number A process is described for the joint production of ethers and hydrocarbons with a high octane number starting from C4 hydrocarbon cuts containing isobutene, by oligomerization with acid catalysts, in the presence of primary alcohols selected fr...	03/03/1998
5576465	Process for preparing unsaturated ethers A process for preparing unsaturated ethers of the formula (1) ##STR1## from acetals or ketal of the formula (2) ##STR2## is improved by heating the acetals or ketals at from 100° to 250° C. in a high-boiling, branched carboxylic acid and obtai...	11/19/1996
5449844	Intermediates for preparing vitamins A and E and carotenoids The present invention relates to a new method of condensing polyenic compounds wherein a compound having the formula III ##STR1## is condensed with a compound having the formula IV ##STR2## under the influence of a Lewis acid or a protic acid. R...	09/12/1995
5446210	Process for the production of polyol ethers A process for the production of polyol ethers comprising the steps of A) reacting a mixture of at least one polyol and at least one carbonyl compound of the formula R1 --CO--R2 (I) in which R1 a...	08/29/1995
5354911	Process for the preparation of unsaturated ethers A process for the preparation of ethers of the formula R1 --CR2 .dbd.CH--O--R3, in which R1 and R3 are each a radical having 1 to 6 carbon atoms and R2 is hydrogen or a radical having 1 to ...	10/11/1994
5130435	Preparation of vinyl ethers Vinyl ethers of the formula ##STR1## wherein R1, R2 and R3 are identical to or different from one another, each being hydrogen, straight-chain or branched alkyl or alkenyl of up to 12 carbon atoms, cycloalkyl or cyclo...	07/14/1992
5100852	Compounds of catalysts for dealkoxylation of gem-dialkoxy Catalytic dealkoxylation of gem-dialkoxy compounds for synthesizing vinyl ethers is disclosed. Zeolites of the mordenite or ZSM5 type with an Na2 O/Al2 O3 molar ratio of 1:1.05 (&#b1;0.25) are used as catalysts....	03/31/1992
4960954	Preparation of enol ethers Enol ethers of the general formula I ##STR1## are prepared by eliminating the radical R4 OH from acetals or ketals of the formula II ##STR2## where the substituents R1 and R2 are each independently of the ot...	10/02/1990
4891451	Preparation of vinyl ethers Vinyl ethers of the formula (I) ##STR1## where R1 to R3 are identical or different and are each hydrogen, a straight-chain or branched alkyl or alkenyl radical of not more than 12 carbon atoms, halogen-substituted alkyl, a cyclo...	01/02/1990
4792637	Process for the preparation of vinyl ethers A process for the synthesis of vinyl ethers of formula ##STR1## wherein R1 and R2, each independently, represent hydrogen or a primary, secondary or tertiary alkyl group, R3 is a hydrogen, a primary alkyl, phenyl, or subst...	12/20/1988
4469887	Process for the production of methacrylic acid from isobutyraldehyde To produce methacrylic acid, firstly, isobutyraldehyde is acetalized. The resultant acetal is cleaved into the isobutenyl ether and alcohol. The isobutenyl ether is oxidized with molecular oxygen or an oxygen-containing gaseous mixture in the presence of ...	09/04/1984
4396782	Process for producing unsaturated ethers A process for producing ଱,ଲ-unsaturated alkenyl ethers by cleavage of acetals in the gas phase and in the presence of a catalyst, the catalyst used being calcium oxide, the acetal cleavage being performed in the temperature range of 200° to 3...	08/02/1983
4317925	Process for the production of di-n-propylacetic acid A process for the preparation of di-n-propylacetic acid which comprises the steps of A. converting n-valeraldehyde-diallyl acetal into allyl-1-pentenyl ether by cleaving one mol of allyl alcohol per one mol of n-valeraldehye-diallyl acetal; B. rearranging...	03/02/1982
4131739	Catalytic rearrangement of cyclic acetals to carboxylic esters Cyclic acetals are rearranged to form isomeric carboxylic acid esters according to the following formula: ##STR1## wherein R is an alkyl, alkenyl, or aromatic moiety containing 1 to 12 carbon atoms; And R' is an alkyl or alkenyl moiety containing 1 t...	12/26/1978
4057575	Process for the preparation of unsaturated esters The invention comprises the oxidation of olefins to unsaturated esters of organic acids or acetals and/or unsaturated ethers of alcohols by contacting the olefin with an organic acid or alcohol reactant in the presence of a catalyst comprising a compound ...	11/08/1977
4014941	Method of producing ଱,ଲ-unsaturated ether A method of producing ଱,ଲ-ethylenically unsaturated ethers, which comprises decomposing an acetal having at least one hydrogen atom bonded to a carbon atom contiguous to the carbon atom of the group ##STR1## in its molecule in the presenc...	03/29/1977

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Class 568/691 - Preparing from an acetal or ketal