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    PROCESS FOR PRODUCING L-PROLINE
    5.
    发明专利
    PROCESS FOR PRODUCING L-PROLINE 未知

    公开(公告)号：CA1176263A

    公开(公告)日：1984-10-16

    申请号：CA411710

    申请日：1982-09-17

    Applicant: DEGUSSA

    Inventor： DRAUZ KARLHEINZ ,  KLEEMANN AXEL ,  MARTENS JUERGEN ,  SCHERBERICH PAUL ,  EFFENBERGER FRANZ

    IPC: C07D207/16 ,  C07D207/22

    Abstract: L-proline is produced from the methyl or ethyl ester of the L-pyroglutamic acid which is reacted with at least twice the molar amount of phosgene to form the corresponding 1-chloro-carbonyl-5,5-dichloro-proline ester, the corresponding 2-chloro-1-chloro-carbonyl-pyroline-(2)-carboxylic ester is produced therefrom by splitting off hydrogen chloride and the latter ester is catalytically hydrogenated to the corresponding N-chloro-carbonyl-proline ester which is then acidically hydrolized to L-proline. The L-proline is obtained in large yields.

    8.
    发明专利
    未知

    公开(公告)号：DK149089B

    公开(公告)日：1986-01-20

    申请号：DK306981

    申请日：1981-07-10

    Applicant: DEGUSSA

    Inventor： BETHGE HORST ,  KLEEMANN AXEL ,  MARTENS JUERGEN ,  SCHERBERICH PAUL

    IPC: C07D277/10 ,  C07D277/60

    Abstract: There are produced thiazoline-(3) compounds which optionally are substituted or unsubstituted in the 2 and/or 5 positions by reaction of oxo compounds with a metal sulfides, ammonia and oxo compounds which are substituted by halogen in the position adjacent to the oxo group. In this process a mixture of oxo compounds, metal sulfides and ammonia is present and the halogen substituted oxo compound is introduced into the mixture. By using in this manner of mixing, high yields are obtained in a relatively short period of time.

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