FIELD: chemistry.
SUBSTANCE: invention relates to the field of organic chemistry, specifically to a process for the preparation of N-isopropyl-N'-phenyl-p-phenylenediamine by alkylation of p-aminodiphenylamine. Process is characterized in that isopropyl bromide is used as an alkylating agent, and crystalline potassium carbonate as an acceptor for binding the liberated hydrogen bromide. Ratio of p-aminodiphenylamine : isopropyl bromide : potassium carbonate is 1:4:1 (eq). Alkylation is carried out in an ethylene glycol medium at a temperature of 90–91 °C for 2–2.5 hours.
EFFECT: proposed process allows the process to be carried out at lower temperatures without the use of catalysts.
1 cl, 1 tbl, 5 ex
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SU1540226A1 |
