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    36.
    发明专利
    未知

    公开(公告)号：DE59106850D1

    公开(公告)日：1995-12-14

    申请号：DE59106850

    申请日：1991-08-16

    Applicant: BASF AG

    Inventor： DOBLER WALTER DR ,  VOSS HARTWIG DR ,  BALKENHOHL FRIEDHELM DR ,  PAUST JOACHIM DR

    IPC: C07F9/09 ,  B01D61/44 ,  C07D307/62 ,  C07F9/655

    Abstract: The invention relates to the preparation of potassium magnesium L-ascorbate-2-phosphate from an aqueous potassium L-ascorbate-2- phosphate solution which is highly contaminated with KCl, as is obtained in the phosphorylation of 5,6-isopropylidene-L-ascorbic acid, by treating the solution with approximately 1 equivalent of magnesium ions per equivalent of L-ascorbate-2-phosphate, followed by removal of the KCl by means of electrodialysis. The process product is a novel L-ascorbate-2-phosphate salt which has very advantageous handling properties.

    37.
    发明专利
    未知

    公开(公告)号：ES2072931T3

    公开(公告)日：1995-08-01

    申请号：ES90103759

    申请日：1990-02-26

    Applicant: BASF AG

    Inventor： DOBLER WALTER DR ,  SCHUL WOLFGANG DR ,  PAUST JOACHIM DR ,  MITSCHKER ALFRED DR

    IPC: C07F9/6558 ,  G01N30/02

    Abstract: In a process for separating thiamine monophosphate from a solution of thiamine phosphates, the solution of thiamine phosphates, which contains the thiamine monophosphate and cocarboxylase is used at a pH of 2 to 7 and a cationic exchanger resin is used having a pKa of 1.0 to 4.5.

    Improved process for the preparation of astaxanthine
    38.
    发明专利
    Improved process for the preparation of astaxanthine 未知

    公开(公告)号：DE4430289A1

    公开(公告)日：1995-03-09

    申请号：DE4430289

    申请日：1994-08-26

    Applicant: BASF AG

    Inventor： ERNST HANSGEORG DR ,  PAUST JOACHIM DR ,  DOBLER WALTER DR ,  RHEUDE UDO DR

    IPC: C07C403/16 ,  C07C47/21 ,  C07C69/66 ,  C07C403/00 ,  C07C403/24 ,  C07F9/50 ,  C07F9/54

    Abstract: Process for preparing astaxanthine by reacting A. The tertiary alcohol of the formula II or the diacetate of the formula III with aqueous hydrobromic acid or hydrochloric acid in an inert solvent, B. Reacting the resulting halide of the formula IV with triphenylphosphine in an inert solvent and C. Reacting the resulting triphenylphosphonium salt with 2,7-dimethyl-2,4,6-octatriene-1,8-dial in a Wittig reaction, which is characterised in that, in reaction step B, the halide of the formula IV is reacted with the triphenylphospine in an open-chain lower-dialkyl ether, triphenylphosphonium salt of the formula V being obtained in a form in which it can be readily filtered, and this is reacted in reaction step C in a Wittig reaction with 2,7-dimethyl-2,4,6-octatriene-1,8-dial while simultaneously or subsequently eliminating the acetyl groups, or else in that, in reaction step A, the starting compound of the formula II or III is reacted with aqueous hydrobromic acid or hydrochloric acid in methylene chloride, the resulting solution of the halide of the formula IV is reacted with triphenylphosphine, and the resulting solution of the triphenylphosphonium salt of the formula V is reacted with 2,7-dimethyl-2,4,6-octatriene-1,8-dial in a Wittig reaction in methylene chloride while eliminating the acetyl groups.

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