申请人:Teijin Limited
公开号:US04158002A1
公开(公告)日:1979-06-12
A process for preparing a compound of the formula ##STR1## wherein m represents zero or 1, which comprises reacting azobenzene with nitric acid in the presence of sulfuric acid in two steps, wherein (1) the first-step reaction is carried out under the following conditions 0<x.ltoreq.80, 0<y.ltoreq.11, and -0.3x+12.ltoreq.y.ltoreq.-0.22x+22 wherein x is the reaction temperature in .degree.C., and y is the weight ratio of sulfuric acid to water and fed into the reaction system, and (2) the second-step reaction is carried out under the following conditions 0.ltoreq.x, and -(1.7/100)x+1.7.ltoreq.y.ltoreq.-(3.9/88)x+3.9.
制备化合物的过程的方程式如下:其中m表示零或1,包括在硫酸的存在下用两步反应偶氮苯与硝酸反应,其中(1)第一步反应在以下条件下进行:0
Borsche, Justus Liebigs Annalen der Chemie, 1907, vol. 357, p. 187
US4158002A
申请人:——
公开号:US4158002A
公开(公告)日:1979-06-12
Werner; Stiasny, Chemische Berichte, 1899, vol. 32, p. 3281
作者:Werner、Stiasny
DOI:——
日期:——
Willgerodt; Hermann, Journal fur praktische Chemie (Leipzig 1954), 1890, vol. <2>42, p. 130
作者:Willgerodt、Hermann
DOI:——
日期:——
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