FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to methods for synthesis of 4-aminodiphenylamine, its intermediate compounds, i. e. 4-nitrodiphenylamino- and/or 4-nitrosodiphenylamino- or alkylated derivative of 4-aminodiphenylamine. Method involves the following steps: (a) interaction of aniline or its derivative and nitrobenzene in the closed zone in the presence of a mixture containing a base and oxidant comprising hydrogen peroxide in the amount from about 0.01 to about 0.60 mole of hydrogen peroxide per number of moles of nitrobenzene for synthesis of at least one intermediate compound of 4-aminodiphenylamine. Indicated oxidant and nitrobenzene are fed into the indicated closed zone simultaneously and water and aniline are removed by boiling; (b) reduction of intermediate compound to 4-aminodiphenylamine and (c) optional hydroalkylation of 4-aminodiphenylamine to yield alkylated derivative of 4-aminodiphenylamine.
EFFECT: improved method of synthesis.
10 cl, 14 tbl, 5 dwg, 17 ex
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