METHOD FOR PREPARING 4-AMINODIPHENYLAMINES Russian patent published in 2006 - IPC C07C209/36 C07C209/38 C07C211/55 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for preparing 4-aminodiphenylamine or its alkylated or substituted derivatives. Method involves the following steps: (a) contacting aniline or aniline derivative and nitrobenzene or nitrobenzene derivative; (b) preparing intermediate substance of 4-aminodiphenylamine by interaction of aniline or derivative of aniline and nitrobenzene or derivative of nitrobenzene in the presence of a mixture containing strong base, peroxide and interphase catalyst, or only for part of time when interaction of aniline and nitrobenzene occurs in the presence of a mixture containing strong base, air and interphase catalyst. The interphase catalyst is chosen from group of compounds determined by the formula (I): wherein R₁, R₂ and R₃ are similar or different and chosen from any alkyl group with direct or branched chain comprising from C₁ to C₂₀; (R₄)_e represents hydrogen atom, for e = 0; R₄ represents R₁R₂R₃N⁺, for e = 1 or 2; Y represents alkyl, aryl, alkylaryl or benzyl and their substituted derivatives; Z represents substitute chosen from group consisting of hydroxyl, halogen atom and other heteroatoms; X represents anionic residue as fluoride, chloride, hydroxide, sulfate, hydrosulfate, acetate, formate, nitrate, phosphate, hydrophosphate, dihydrophosphate, oxalate, carbonate, borate, tartrate, citrate, malonate and mixture of indicated compounds wherein a means valence of anionic residue (1, 2 or 3); b and c represent whole number with value 1, 2 or 3; d represents whole number with value from 0 to 4 and wherein strong base and interphase catalyst can be similar or different; (c) reduction of intermediate substance of 4-aminodiphenylamine from step (b) to obtain 4-aminodiphenylamine or its substituted derivatives, and (d) optionally, reductive alkylation of 4-aminodiphenylamine or its substituted derivatives from step (c) to an alkylated derivative of 4-aminodiphenylamine or its substituted derivatives.

EFFECT: improved preparing method.

18 cl, 22 tbl, 16 ex