VERFAHREN ZUR HERSTELLUNG VON NITROBIPHENYLEN
    6.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON NITROBIPHENYLEN 失效
    用于生产nitrobiphenyls

    公开(公告)号:EP0888261A1

    公开(公告)日:1999-01-07

    申请号:EP97907075.0

    申请日:1997-03-06

    摘要: The invention concerns a process for preparing nitrobiphenylene of formula (I) wherein m stands for 1 or 2, R means halogen, R' or OR', R' being a C-organic group which can carry groups which are inert in the reaction conditions, n stands for 0, 1, 2 or 3 and, if n is 2 or 3, the R groups can also be different. According to the invention, a chloronitrobenzene of formula (II) is reacted in the presence of a palladium catalyst and a base in a solvent with a phenyl boric acid (IIIa), one of its alkyl esters of formula (IIIb), R1 meaning C¿1?-C6 alkyl, or one of its anhydrides. The compounds (I) are suitable as initial products for biphenylamines which are in turn intermediate products for fungicidal plant-growth substances.