Production of aminophenols

Details Production of aminophenols Production of aminophenols

1997-09-17

1999-06-01

Burn, Brian M.

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

Organic compounds

Amino nitrogen containing

C07C20938

Patent

active

059089610

ABSTRACT:
A method of producing N,N-disubstituted aminophenols of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represents a saturated or unsaturated aliphatic hydrocarbyl, cycloalkyl, aralkyl, the phenyl ring of which may be further substituted, alkoxyalkyl, or a cycloalkylalkyl, except that R.sub.1 and R.sub.2 are not simultaneously methyl and R' represents hydrogen, halogen, nitro, cyano, alkyl or alkoxy, which comprises reacting an aminophenol of general formula ##STR2## wherein R.sub.3 represents hydrogen or R.sub.1, and R' is as defined above, with an organic halide species of general formula R.sub.2 X wherein R.sub.2 is as defined above and X is halogen under aqueous acidic conditions with the periodic addition of an acid trapping agent in such a way that continuous monitoring of pH is not required.

REFERENCES:
patent: 2286475 (1942-06-01), Egloff et al.
patent: 2541655 (1951-02-01), Levis, Jr.
Grimme, Schmitz: "Uber die Dartsellung von N,N-(Bis-n-butyl-m-amino phenol" Chemische Berichte., vol. 84, 1951, p. 740.

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