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    4.
    发明专利
    未知

    公开(公告)号：DE50211588D1

    公开(公告)日：2008-03-13

    申请号：DE50211588

    申请日：2002-07-26

    Applicant: BASF AG

    Inventor： RUST HARALD ,  BURKART KIRSTEN ,  FAUST TILLMANN DR ,  HENKELMANN JOCHEM DR ,  KINDLER ALOIS DR ,  KNOLL CHRISTIAN DR ,  MOHRY ANDRE DR

    IPC: C07D263/42

    Abstract: Continuous production of 5-alkoxy oxazoles (I) comprises heating an alkyl alpha -isocyanoalkanoate ester (II) at a temperature above 80 degrees C in the presence of an auxiliary agent and withdrawing the product from the reactor. Continuous production of 5-alkoxy oxazoles of formula (I) comprises heating an alkyl alpha -isocyanoalkanoate ester of formula (II) at a temperature above 80 degrees C in the presence of an auxiliary agent and withdrawing the product from the reactor. R1 = optionally substituted 1-6C alkyl; R2 = H or optionally substituted 1-6C alkyl. An Independent claim is also included for a process for producing pyridoxine derivatives of formula (IX), comprising: (1) converting an amino acid of formula (III) to an ester of formula (IV); (2) converting (IV) to a formamido ester of formula (IV); (3) converting (IV) to (II); (4) converting (II) to (I) as above; (5) reacting (I) with a protected diol of formula (VI) to form a Diels-Alder adduct of formula (VII); and (6) converting (VII) to (IX) by acid treatment and deprotection. R3, R4 = protecting groups or together form a protecting group.

    6.
    发明专利
    未知

    公开(公告)号：DE4002066A1

    公开(公告)日：1991-08-01

    申请号：DE4002066

    申请日：1990-01-25

    Applicant: BASF AG

    Inventor： FAUST TILLMANN DR ,  MEYER JOACHIM DR ,  WELLINGHOFF GEORG DR ,  GOESELE WALTER DR ,  MARTIN CHRISTOPH DR ,  GRIMMER JOHANNES

    IPC: C07D475/14 ,  C12P17/18 ,  C12P25/00

    Abstract: Riboflavin is removed from fermentation suspensions by them being heated at from 50 DEG to 90 DEG C. for from 1 to 3 hours, than cooled to from 0 DEG to 30 DEG C. over a period of from 1 to 5 hours, and subsequently being centrifuged to give a sediment fraction and liquid fraction in such a way that the sediment fraction contains predominantly riboflavin crystals as solid, and the liquid fraction contains virtually no crystalline riboflavin, and, where appropriate, resuspending the sediment fraction in from 0.5 to 2 parts by volume of water per part by volume of sediment fraction and repeating procedure c.

    7.
    发明专利
    未知

    公开(公告)号：DE59009375D1

    公开(公告)日：1995-08-10

    申请号：DE59009375

    申请日：1990-12-22

    Applicant: BASF AG

    Inventor： FAUST TILLMANN DR ,  MEYER JOACHIM DR ,  WELLINGHOFF GEORG DR ,  GOESELE WALTER DR ,  MARTIN CHRISTOPH DR ,  GRIMMER JOHANNES

    IPC: C07D475/14 ,  C12P17/18 ,  C12P25/00

    Abstract: Riboflavin is removed from fermentation suspensions by them being heated at from 50 DEG to 90 DEG C. for from 1 to 3 hours, than cooled to from 0 DEG to 30 DEG C. over a period of from 1 to 5 hours, and subsequently being centrifuged to give a sediment fraction and liquid fraction in such a way that the sediment fraction contains predominantly riboflavin crystals as solid, and the liquid fraction contains virtually no crystalline riboflavin, and, where appropriate, resuspending the sediment fraction in from 0.5 to 2 parts by volume of water per part by volume of sediment fraction and repeating procedure c.

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