[EN] PROCESS FOR PRODUCING SULFUR-CONTAINING AMINO ACID OR SALT THEREOF [FR] PROCÉDÉ DE PRODUCTION D'UN ACIDE AMINÉ CONTENANT DU SOUFRE OU DE L'UN DE SES SELS
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.
[EN] PROCESS FOR PRODUCING SULFUR-CONTAINING AMINO ACID OR SALT THEREOF<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN ACIDE AMINÉ CONTENANT DU SOUFRE OU DE L'UN DE SES SELS
申请人:SUMITOMO CHEMICAL CO
公开号:WO2011118849A1
公开(公告)日:2011-09-29
According to the present invention, a new process for producing a sulfur-containing amino acid without using of hydrogen cyanide or sodium azide which requires careful handling as a raw material can be provided. The present invention relates to a process for producing a sulfur-containing amino acid represented by the following formula (1) or a salt thereof: wherein R1 is an alkyl group having 1 to 12 carbon atoms and optionally having substituents or a cycloalkyl group having 3 to 12 carbon atoms and optionally having substituents, and n is an integral number of from 1 to 4, comprising a step of reacting a sulfur-containing 2-ketocarboxylic acid represented by the formula (2) or a salt thereof: wherein R1 and n mean the same as defined above, with ammonia and hydrogen in the presence of a transition metal catalyst.