Process for preparing N-alkylaminophenols

Details Process for preparing N-alkylaminophenols Process for preparing N-alkylaminophenols

1991-04-29

1993-04-13

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564396, 564397, 564401, 564402, 564471, 564473, 564480, C07C20926

Patent

active

052024857

ABSTRACT:
A process for preparing an N-alkylaminophenol is disclosed, comprising subjecting an aminophenol to reductive alkylation with an aldehyde or a ketone in the presence of an organic solvent and hydrogen, wherein the reductive alkylation is carried out at a temperature of from 20.degree. to 70.degree. C. in the further presence of a catalyst for reduction comprising platinum and at least one metal element selected from metal elements belonging to the IB group, IIB group, IVB group, VB group, and VIB group of the Periodic Table, supported on activated carbon, or comprising palladium and at least one metal element selected from metal elements belonging to the IB group, IIB group, IVB group, VB group and VIB group of the Periodic Table, supported on activated carbon.

REFERENCES:
patent: 4792622 (1988-12-01), Yokota et al.
patent: 4921980 (1990-05-01), Rusek

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