3.
    发明专利
    未知

    公开(公告)号:DE4026788A1

    公开(公告)日:1992-02-27

    申请号:DE4026788

    申请日:1990-08-24

    Applicant: BASF AG

    Abstract: Process for the production of alpha , alpha -dialkoxyketones of the general formula I in which R and R independently of one another are hydrogen, C1- to C20-alkyl, C3- to C20-cycloalkyl, C4- to C30-cycloalkylalkyl, C9- to C30-alkylcycloalkyl, or optionally C1- to C8-alkyl-, C1- to C8-alkoxy-, halogen-, C1- to C4-haloalkyl-, C1- to C4-haloalkoxy-, phenyl-, phenoxy-, halophenyl-, halophenoxy- and/or cyano-substituted aryl, C7- to C20-aralkyl or heterocycle, R is additionally R and R independently of one another are C1- to C20-alkyl, C3- to C20-cycloalkyl, aryl, C7- to C20-arylalkyl, or together are a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, and R is R or together with R is a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, by reacting ketones or aldehydes of the general formula II with nitrites of the general formula III R -(NO2)n (III> in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the nitrite groups are terminal, or with a mixture of alcohol of the general formula IV R -(OH)n IV in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the hydroxyl group is terminal, and with dinitrogen trioxide in a molar ratio of 2:1 in the presence of an acid catalyst, at temperatures from 0 to 170 DEG C.

    6.
    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.

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