PROCESS FOR DEMETHYLATING DIMETHYLSULPHONIUM COMPOUNDS,申请号WO1994EP01640-传众专利搜索

PROCESS FOR DEMETHYLATING DIMETHYLSULPHONIUM COMPOUNDS

申请公布号：WO9426918(A1)

申请号：WO1994EP01640

申请日期：1994.05.16

申请公布日期：1994.11.24

申请人：

QUEST INTERNATIONAL B.V.;HANSEN, THEO, ADRIAAN;VAN DER MAAREL, MARC, JOS, E., C.

发明人：HANSEN, THEO, ADRIAAN;VAN DER MAAREL, MARC, JOS, E., C.

分类号：A23L27/29;C12P11/00;C12P13/04;C12R1/01;C12R1/89

主分类号：A23L27/29

摘要：The invention concerns a process for preparing S-methylmercapto and mercapto compounds comprising the step of demethylating a dimethylsulfonium compound of formula (I) to the corresponding S-methylmercapto compound of formula (II), using a microorganism or alga which is capable of demethylating 3-dimethylsulphoniumpropionate (DMSP) to S-methyl-3-mercaptopropionate (MMPA), but which is incapable of further demethylating the latter compound to 3-mercapto-proportionate with the same speed, or using an enzyme preparation derivable from such microorganism or alga. Preferably the group R denotes CH2-CH2-COOH (I is DMSP), CH2-CH(NH2)-COOH (I is S-dimethyl-cystein), CH2-CH2-CH(NH2)-COOH (I is S-methyl-methionine) or CH2-COOH (I is 2-dimethylsulphoniumacetate), or a salt or ester of any of these. Preferably the microorganisms are marine Desulfobacterium strains, especially a Desulfobacterium autotrophicum, Desulphobacterium vacuolatum or similar strain.