Process for otho- and para-alkylating diphenylamines

Details Process for otho- and para-alkylating diphenylamines Process for otho- and para-alkylating diphenylamines

1986-09-04

1988-04-19

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 8524

Patent

active

047391219

ABSTRACT:
Ortho-para-alkylated diphenylamines are prepared utilizing an improved, one-stage process wherein the diphenylamines are ortho-alkylated by reaction with a first olefin in the presence of an aluminum complex as the catalyst, and are subsequently para-alkylated by reaction with a second olefin using a Friedel-Crafts aluminum catalyst. The para-alkylation is carried out without prior isolation or solvent washing of the ortho-alkylated diphenylamine intermediates.

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Angew. Chem. 69, 124-131, (1957).

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