中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

24 records (took 0.024 seconds)

    1.
    发明专利
    失效

    公开(公告)号：JPH0641638B2

    公开(公告)日：1994-06-01

    申请号：JP12543384

    申请日：1984-06-20

    Applicant: BASF AG

    Inventor： DEIITAA DEEGUNAA ,  HAINTSU HANNEBAUMU ,  HARUDOO JIIGERU ,  WARUTAA GURAMURITSUHI

    IPC: C07C43/307 ,  C25B3/02

    Abstract: Benzaldehyde dialkyl acetals of the formula I wherein R1 and R2 are each alkyl, are prepared by electrochemical oxidation of an alkyltoluene of the formula II by a process in which the electrolyte used contains from 60 to 90% by weight of an alkanol of the formula R2OH, from 8.5 to 40% by weight of the alkyltoluene and from 0.01 to 1.5% by weight of an HO3S-containing acid.

    PRODUCTION OF BENOIC ORTHO-ESTER
    2.
    发明专利
    PRODUCTION OF BENOIC ORTHO-ESTER 失效

    公开(公告)号：JPS6240388A

    公开(公告)日：1987-02-21

    申请号：JP18792886

    申请日：1986-08-12

    Applicant: BASF AG

    Inventor： DEIITAA DEEGUNAA ,  EBAAHARUTO SHIYUTETSUKUHAN

    IPC: C07C41/00 ,  C07C43/32 ,  C07C67/00 ,  C25B3/02 ,  C25B3/10

    Abstract: Preparation of aromatic carboxylic acid ortho-esters of the formula I I where R is C1-C4-alkyl and R1 is H, halogen, alkyl, aryl, heteroaryl, alkoxy, aryloxy, acyl, acyloxy or CN, by electro-oxidizing benzene derivatives of the formula II II where R2 is CH3 or CH(OR2), in the presence of an alcohol ROH, a halogenated triarylamine compound and a base, and novel ortho-trialkyl 4-tert-butoxybenzoates, where alkyl is of 1 to 4 carbon atoms. Ortho-trialkyl 4-tert-butoxybenzoates are scents and are also used to prepared p-hydroxybenzoic acid esters.

    PRODUCTION OF BENZALDEHYDE
    6.
    发明专利
    PRODUCTION OF BENZALDEHYDE 失效

    公开(公告)号：JPS5589487A

    公开(公告)日：1980-07-07

    申请号：JP16580779

    申请日：1979-12-21

    Applicant: BASF AG

    Inventor： DEIITAA DEEGUNAA ,  HARUDOO JIIGERU

    IPC: C25B3/02

    Abstract: A process for the preparation of benzaldehydes of the general I where R1 is hydrogen or alkyl, wherein a compound of the formula II where X is hydrogen, hydroxyl or R2-COO-, and R2 is hydrogen or alkyl of 1 to 6 carbon atoms, is oxidized electrochemically in the presence of water, of an alkanoic acid of the formula R3COOH III where R3 is hydrogen or alkyl of 1 to 6 carbon atoms, and of a conductive salt.

    8.
    发明专利
    失效

    公开(公告)号：JPH0143030B2

    公开(公告)日：1989-09-18

    申请号：JP18850381

    申请日：1981-11-26

    Applicant: BASF AG

    Inventor： DEIITAA DEEGUNAA ,  MANFUREEDO BAARU

    IPC: C25B3/10 ,  C07C43/305 ,  C07C50/04 ,  C25B3/02

    Abstract: 1. A process for the preparation of a mixture of ketals of trimethyl-p-benzoquinone, of the formula see diagramm : EP0053261,P4,F2 where R**1 and R**2 are alkyl of 1 to 4 carbon atoms and R**3 is R**2 O, or the two radicals R**3 together are oxygen, wherein an alkyl trimethylphenyl ether of the formula see diagramm : EP0053261,P4,F3 is oxidized electrochemically in the presence of an alkanol of the formula R**2 OH.

Patent Agency Ranking