8.
    发明专利
    未知

    公开(公告)号:DE3740270A1

    公开(公告)日:1989-06-01

    申请号:DE3740270

    申请日:1987-11-27

    Applicant: BASF AG

    Abstract: Phenylacetaldehydes of the general formula I (I) where R1 to R5 are each independently of the others hydrogen, alkyl, alkoxy, halogen, haloalkyl, haloalkoxy or haloalkylthio, by catalytic rearrangement in the presence of a zeolite, are prepared by reacting an epoxy of the formula II or a phenylglycol of the formula III (II) (III) where Y and Z can be identical to or different from each other and are each hydroxyl, alkoxy, aryloxy or acyloxy, in the gas phase over a borosilicate zeolite catalyst at from 70 DEG to 200 DEG C. under reduced pressure.

    10.
    发明专利
    未知

    公开(公告)号:DE3601927A1

    公开(公告)日:1987-07-30

    申请号:DE3601927

    申请日:1986-01-23

    Applicant: BASF AG

    Abstract: Alpha,beta-substituted acroleins of the general formula I (I) where A and B are identical or different and are each C1-C4-alkyl, naphthyl, biphenyl or phenyl which may be monosubstituted or polysubstituted by halogen, nitro, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkyl, phenoxy or phenylsulfonyl, are prepared by a process in which a compound of the general formula III (III) where A has the above meanings and R1 and R2 are identical or different and are each C1-C4-alkyl or together possess the carbon atoms required to complete a ring, is reacted with a phosphorus compound of the general formula IV or V (IV) (V) where B the meanings stated above, R1 and R2 are as defined above and X(-) is a halide ion, in the presence of a base. The alpha,beta-substituted acroleins can be further processed to give hydroxymethyloxiranes.

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