2.
    发明专利
    未知

    公开(公告)号:DE3877423D1

    公开(公告)日:1993-02-25

    申请号:DE3877423

    申请日:1988-06-08

    Applicant: BASF AG

    Abstract: Ethyl 4-(O,O-dialkylphosphono) tiglates of formula (Ia) are new (where R1 = 1-4C alkyl). Tiglates (I) are produced by (a) reacting an alkyl 2-methyl-3-butenoate of formula (II) with Cl2 or Br2 in the absence of solvent; (b) reacting the resulting 3,4-dihalo-2-methylbutyrate of formula (III) with an alkali metal hydroxide in R2OH or R2OH/H2O; (c) reacting the resulting alkyl 4-halotiglate (E/Z isomer mixt.) of formula (IV) with a trialkyl phosphite of formula (V); and (d) thermally isomerising the prod. (In the formulae R2 = 1-3C alkyl; X = Cl or Br). Prodn. of cpds. (IV) is also claimed.

    3.
    发明专利
    未知

    公开(公告)号:DE3585721D1

    公开(公告)日:1992-04-30

    申请号:DE3585721

    申请日:1985-11-08

    Applicant: BASF AG

    Abstract: Prodn. of substd. piperidines of formula (I) comprises reacting the substd. glutardialdehyde (II) with R3NH2 and H2, at elevated temp and pressure, in presence of a hydrogenation catalyst. In the formulae, R1 and R2=alkyl, cycloalkyl, aryl or aralkyl, or together complete a 5 or 6-membered ring; one of R1 and R2 can also be H; R3=H or 1-4C alkyl.

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