Process for preparing nitrobiphenylene

    公开(公告)号:CZ294102B6

    公开(公告)日:2004-10-13

    申请号:CZ287698

    申请日:1997-03-06

    Applicant: BASF AG

    Abstract: The present invention relates to a process for preparing nitrobiphenylene of the general formula I wherein m stands for 1 or 2, R represents a halogen or R' whereby R' is selected from the group consisting of a cyano group, formyl, a formyloxy group and optionally a substituted alkyl, alkenyl, alkoxy group, alkenyloxy group, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy group, cycloalkyl, cycloalkoxy group, phenyl or phenoxy group, n stands for 0, 1, 2 or 3 and, if n is 2 or 3. According to the invention, a chloronitrobenzene of the general formula II is reacted in the presence of a base and a palladium catalyst being selected from the group consisting of (a) triarylphosphane complex containing in zero oxidation stage, (b) a palladium salt in the presence of triphenylphosphane and (c) optionally a supported metallic palladium, in the presence of triarylphosphane with a phenyl boric acid of the general formula IIIa, or of alkyl ester thereof of the general formula IIIb or with anhydride thereof.

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