申请人:Bayer Aktiengesellschaft
公开号:US04892958A1
公开(公告)日:1990-01-09
A process for the preparation of a 5-amino-1-phenyl-4-nitropyrazole of the formula ##STR1## in which Ar is optionally substituted phenyl, which comprises reacting an arylhydrazine of the formula Ar--NH--NH.sub.2 (II) with 3-chloro-4-nitro-isothiazole of the formula ##STR2##
一种制备式为Ar-NH-NH2(II)的芳基肼与式为的3-氯-4-硝基异噻唑发生反应的过程,其中Ar是可选择地取代的苯基。