4.
    发明专利
    未知

    公开(公告)号:DE59303428D1

    公开(公告)日:1996-09-19

    申请号:DE59303428

    申请日:1993-09-25

    Applicant: BASF AG

    Abstract: Process for preparing 4-acetoxystyrene, of the formula I, by reacting 1-(4-acetoxyphenyl)ethyl carboxylates of the general formula II in which R denotes C1- to C10-alkyl, C3- to C6-cycloalkyl, aryl or C7- to C10-aralkyl, in the presence of an acidic catalyst and a polymerisation inhibitor in an inert heat transfer medium at temperatures from 160 to 250 DEG C and a pressure of 0.1 to 300 mbar.

    6.
    发明专利
    未知

    公开(公告)号:DE59200536D1

    公开(公告)日:1994-10-27

    申请号:DE59200536

    申请日:1992-10-08

    Applicant: BASF AG

    Abstract: 1,1'-Bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, and a novel process for the preparation of 1,1'-bis-(3-aminopropyl)-2,2'-diimidazole of the formula I, in which 2,2'-diimidazole of the formula II, is reacted with acrylonitrile of the formula III, in the presence of basic catalysts at temperatures from 80 to 150 DEG C, and the product is hydrogenated with an excess of hydrogen on cobalt-, nickel-, ruthenium- and/or noble-metal-containing catalysts in the presence of ammonia, at temperatures from 40 to 200 DEG C and under pressures from 10 to 200 bar.

    9.
    发明专利
    未知

    公开(公告)号:ES2090808T3

    公开(公告)日:1996-10-16

    申请号:ES93115523

    申请日:1993-09-25

    Applicant: BASF AG

    Abstract: Process for preparing 4-acetoxystyrene, of the formula I, by reacting 1-(4-acetoxyphenyl)ethyl carboxylates of the general formula II in which R denotes C1- to C10-alkyl, C3- to C6-cycloalkyl, aryl or C7- to C10-aralkyl, in the presence of an acidic catalyst and a polymerisation inhibitor in an inert heat transfer medium at temperatures from 160 to 250 DEG C and a pressure of 0.1 to 300 mbar.

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