中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

20 records (took 0.02 seconds)

    6.
    发明专利
    未知

    公开(公告)号：DE2725146A1

    公开(公告)日：1978-12-14

    申请号：DE2725146

    申请日：1977-06-03

    Applicant: BASF AG

    Inventor： SCHIRMER ULRICH DIPL CHEM DR ,  WUERZER BRUNO ,  ROHR WOLFGANG DIPL CHEM DR

    IPC: A01N47/10 ,  A01N47/20 ,  A01N47/22 ,  A01N47/30 ,  A01P13/02 ,  C07C67/00 ,  C07C271/38 ,  C07C325/00 ,  C07C331/02 ,  C07C333/08 ,  C07C333/24 ,  H01L25/00 ,  C07C155/02 ,  C07C155/08 ,  A01N9/12

    Abstract: 1. A diurethane of the general formula see diagramm : EP0000030,P50,F6 where Z denotes the radical see diagramm : EP0000030,P50,F7 and Y denotes the radical see diagramm : EP0000030,P50,F8 Z always being different from Y and R**1 and R**2 being identical or different and each denoting hydrogen, alkyl of 1 to 4 carbon atoms, alkoxyalkyl of 2 to 4 carbon atoms, alkoxycarbonylalkyl of 3 to 5 carbon atoms, haloalkyl of 1 to 4 carbon atoms, unsubstituted benzyl, or benzyl substituted by alkyl of 1 to 4 carbon atoms or halogen, R**3 and R**4 being identical or different and each denoting unsubstituted alkyl of 1 to 6 carbon atoms, alkyl of 1 to 4 carbon atoms substituted by halogen, alkoxy of 1 to 2 carbon atoms, halogen-substituted phenyl or unsubstituted phenyl, alkenyl of 2 to 4 carbon atoms, alkynyl of 3 to 4 carbon atoms, unsubstituted or C1 -C4 -alkyl- substituted cycloalkyl of 5 to 8 carbon atoms, bicycloalkyl of 7 to 8 carbon atoms, tricycloalkyl of 10 to 15 carbon atoms, phenyl with a fused ring system, phenyl or mono- or poly-substituted phenyl with the substituents alkyl of 1 to 4 carbon atoms, halogen or alkoxy of 1 to 3 carbon atoms, X denotes hydrogen, alkyl of 1 to 4 carbon atoms, haloalkyl of 1 to 3 carbon atoms, alkoxy of 1 or 2 carbon atoms, halogen, nitro or amino, n denotes one of the integers 1, 2, 3 and 4, and A, B, D and E are identical or different and each denotes oxygen or sulfur (with the proviso that the radicals A, B, D and E are not simultaneously oxygen and one of the radicals always denotes sulfur).

    7.
    发明专利
    未知

    公开(公告)号：DE3213684A1

    公开(公告)日：1983-10-27

    申请号：DE3213684

    申请日：1982-04-14

    Applicant: BASF AG

    Inventor： REISSENWEBER GERNOT DIPL CHEM ,  SCHIRMER ULRICH DIPL CHEM DR

    IPC: C07C271/08 ,  C07C67/00 ,  C07C239/00 ,  C07C271/06 ,  C07C125/065

    Abstract: N-Methoxy-N-methylurethanes are prepared by a process in which first (1) hydroxylamine is converted with an alkyl chloroformate to the corresponding N-hydroxyurethane, then (2) this product is reacted with a methylating agent to give the N-methoxy-N-methylurethane, and finally (3) the N-methoxy-N-methylurethane is isolated. In this process, first, (1) while maintaining a certain temperature and a certain pH, (1.1) an aqueous solution of an inorganic hydroxylammonium salt is mixed thoroughly with (1.2) an equimolar amount of an alkyl chloroformate, then (2) while maintaining a certain temperature and a certain pH, (2.1) a mixture comprising (2.1.1) the reaction mixture obtained as described in (1), (2.1.2) a water-insoluble organic solvent and (2.1.3) a phase-transfer catalyst is mixed thoroughly with (2.2) a water-insoluble methylating agent which is soluble in the solvent under (2.1.2), and the resulting mixture is kept at a certain temperature for a certain time, and finally (3) any methylating agent still present in the reaction mixture obtained as described in (2) is destroyed, the non-aqueous liquid phase is separated off from the mixture thus treated, and the N-methoxy-N-methylurethane is isolated from this phase by stripping off the solvent. A relatively pure product is obtained in high yield.

Patent Agency Ranking