Process for the preparation of N-acylated p-amino-phenols

Details Process for the preparation of N-acylated p-amino-phenols Process for the preparation of N-acylated p-amino-phenols

1993-05-05

1994-04-12

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560 30, 560 31, 560 32, 564161, 564169, 564192, C07C26900

Patent

active

053027426

ABSTRACT:
N-acylated p-amino-phenols can be prepared by catalytical hydrogenation of the underlying aromatic nitro compounds in a reaction medium of aqueous sulfuric acid in the sense of a Bamberger type reaction at elevated temperature, optionally in the presence of a water-miscible organic solvent, and subsequent reaction of this reaction mixture with an acid chloride, optionally in the presence of an acid binder and optionally in the presence of a diluent.

REFERENCES:
patent: 2998450 (1961-08-01), Wilbert et al.
patent: 3917695 (1975-11-01), Schulman et al.
patent: 5059623 (1991-10-01), Kruger et al.
Methoden Der Organischen Chemie, (Houben-Weyl) Bd. VI/1C, 1976, Stuttgard, pp. 91-101.

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