10.
    发明专利
    未知

    公开(公告)号:ES2153672T3

    公开(公告)日:2001-03-01

    申请号:ES97929163

    申请日:1997-06-11

    Applicant: BASF AG

    Abstract: A process for preparing a compound of the formula Iwhere R1 and R2 are hydrogen or C1-C4-alkyl and R3 is C1-C10-alkyl, phenyl or C1-C4-alkyl-substituted phenyl, comprises reacting a compound IIwith a compound of the formula IIIwhere X is chlorine, bromine or iodine, in the presence of a Friedel-Crafts catalyst in one step to give a compound I.

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