[EN] PROCESS FOR PRODUCING CARBOXYLIC ACID ESTER<br/>[FR] PROCÉDÉ DE PRODUCTION D'ESTER D'ACIDE CARBOXYLIQUE
申请人:SUMITOMO CHEMICAL CO
公开号:WO2012026617A1
公开(公告)日:2012-03-01
The present invention relates to a process for producing a carboxylic acid ester, comprising a step of oxidizing an aldehyde by mixing an alcohol, carbon dioxide, the aldehyde and at least one compound selected from the group consisting of compounds represented by the formulae (2-1) and (2-2): wherein R2 represents an alkyl group optionally having a substituent or the like; R3 and R4 each independently represents an alkyl group optionally having a substituent or the like or R3 and R4 are linked together to form a divalent hydrocarbon group optionally having a substituent or the like; Y represents a group of -S- or a group of -N(R5)-, wherein R5 represents an alkyl group optionally having a substituent or the like, or R5 is linked to R4 to form a divalent hydrocarbon group optionally having a substituent; and R8 represents an alkyl group.
[EN] METHOD FOR PRODUCING ALPHA-KETOALDEHYDE COMPOUND<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN COMPOSÉ D'ALPHA-CÉTOALDÉHYDE
申请人:SUMITOMO CHEMICAL CO
公开号:WO2013018626A1
公开(公告)日:2013-02-07
An object of the present invention is to provide a new method for producing an ALPHA-ketoaldehyde compound from a 2-oxo-primary alcohol compound. The present invention provides a method for producing an ALPHA-ketoaldehyde compound including a step of oxidizing a 2-oxo-primary alcohol compound in the presence of platinum, a platinum compound, iron or an iron compound. The 2-oxo-primary alcohol compound is preferably a compound represented by the formula (1a), and the ALPHA-ketoaldehyde compound is preferably a compound represented by the formula (2a), wherein Ra is a C1-C6 alkyl group which may have a substituent or a C6-C20 aryl group which may have a substituent.
A novel method for producing methionine without using hydrogen cyanide as a raw material has been demanded. A method for producing methionine including a step A of oxidizing 4-methylthio-2-oxo-1-butanal in the presence of an alcohol; a step B of hydrolyzing a 4-methylthio-2-oxo-butanoic acid ester obtained in the step A; and a step C of subjecting 4-methylthio-2-oxo-butanoic acid obtained in the step B to reductive amination.