1-(2-nitrophenyl)-5-aminopyrazoles under basic conditions has been reinvestigated and the structures of the obtained pyrazolo[5,1-c][1,2,4]benzotriazine 5-oxides confirmed by spectroscopic means. In particular the different aromatic nucleophilic attack on 8-chloro derivatives 4a and 6a and 7-nitro derivatives 11a and 12a was determined. From these latter compounds unexpected (phenyl-ONN-azoxy)pyrazoles were isolated
对1-(2-
硝基苯基)-5-
氨基
吡唑在碱性条件下的反应进行了重新研究,并通过光谱法证实了所获得的
吡唑并[5,1- c ] [1,2,4]苯并三嗪5-氧化物的结构。特别地,确定了对8-
氯衍
生物4a和6a以及7-硝基衍
生物11a和12a的不同芳族亲核攻击。从这些后面的化合物意外(苯基ONN -azoxy)
吡唑类中分离得到。