中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

9 records (took 0.023 seconds)

    2.
    发明专利
    未知

    公开(公告)号：DK119430B

    公开(公告)日：1971-01-04

    申请号：DK568268

    申请日：1968-11-21

    Applicant: HOFFMANN LA ROCHE

    Inventor： SCHAEREN S

    IPC: C07F9/58

    Abstract: 1,189,545. Pyridoxin-5 1 -phosphate. F. HOFFMANN-LA ROCHE & CO. A.G. 12 Dec., 1968 [15 Dec., 1967], No. 59070/68. Heading C2V. Pyridoxin-5 1 -phosphate is obtained by reacting an acetal or ketal of formula where R 1 and R 2 are hydrogen atoms, alkyl, alkenyl or aryl groups or together form an alkylene group, or an acid addition salt of such a compound, with polyphosphoric acid and hydrolysing the polyphosphate thus obtained by addition of water. Examples are given.

    4.
    发明专利
    未知

    公开(公告)号：SE366547B

    公开(公告)日：1974-04-29

    申请号：SE421970

    申请日：1970-03-25

    Applicant: HOFFMANN LA ROCHE

    Inventor： SCHAEREN S

    IPC: C07D263/42 ,  C07D85/44

    Abstract: A process for the preparation of 4-methyl-5-alkoxy-oxazoles from 5-alkoxy-4-oxazolylacetic acids, which products are useful as intermediates for the preparation of pyridoxine. The starting materials are heated at a temperature of 100 DEG -150 DEG C. in the presence of a dienophile (A-HC=CH-B, wherein A and B are trans and each is an electron-withdrawing group) until evolution of CO2 ceases.

    6.
    发明专利
    未知

    公开(公告)号：DK125023B

    公开(公告)日：1972-12-18

    申请号：DK150470

    申请日：1970-03-24

    Applicant: HOFFMANN LA ROCHE

    Inventor： SCHAEREN S

    IPC: C07D263/42 ,  C07D85/44

    Abstract: A process for the preparation of 4-methyl-5-alkoxy-oxazoles from 5-alkoxy-4-oxazolylacetic acids, which products are useful as intermediates for the preparation of pyridoxine. The starting materials are heated at a temperature of 100 DEG -150 DEG C. in the presence of a dienophile (A-HC=CH-B, wherein A and B are trans and each is an electron-withdrawing group) until evolution of CO2 ceases.

    7.
    发明专利
    未知

    公开(公告)号：SE349290B

    公开(公告)日：1972-09-25

    申请号：SE1335867

    申请日：1967-09-28

    Applicant: HOFFMANN LA ROCHE

    Inventor： SCHAEREN S ,  FURLENMEIER A

    IPC: C07C45/40 ,  C07C45/81 ,  C07C49/757 ,  C07C45/00 ,  C07C169/22 ,  C07C169/34

    Abstract: Method for prepn. of carbonyl cpds. (R1, R2 & R3 = sec. amine residues, pref. from di-(1-7C)-alkylamines or heterocyclic amines). (a) The redn. proceeds at low temp., (b) high yield and the carbonyl group does not reduce further, (c) excess phosphine is readily removed by acid washing and (d) no additional solvent is required.

    8.
    发明专利
    未知

    公开(公告)号：SE335125B

    公开(公告)日：1971-05-17

    申请号：SE1666668

    申请日：1968-12-05

    Applicant: HOFFMANN LA ROCHE

    Inventor： SCHAEREN S

    IPC: C07F9/58 ,  C07D31/30

    Abstract: 1,189,545. Pyridoxin-5 1 -phosphate. F. HOFFMANN-LA ROCHE & CO. A.G. 12 Dec., 1968 [15 Dec., 1967], No. 59070/68. Heading C2V. Pyridoxin-5 1 -phosphate is obtained by reacting an acetal or ketal of formula where R 1 and R 2 are hydrogen atoms, alkyl, alkenyl or aryl groups or together form an alkylene group, or an acid addition salt of such a compound, with polyphosphoric acid and hydrolysing the polyphosphate thus obtained by addition of water. Examples are given.

Patent Agency Ranking