Process for the preparation of aromatic amines which are substit

Details Process for the preparation of aromatic amines which are substit Process for the preparation of aromatic amines which are substit

1991-07-10

1994-04-19

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564418, 564428, C07C20936

Patent

active

053046803

ABSTRACT:
Aromatic amines which are substituted by C.sub.1 -C.sub.4 -alkoxy in the p-position are prepared by catalytic hydrogenation of the underlying aromatic nitro compounds in a reaction medium comprising sulphuric acid and a C.sub.1 -C.sub.4 -alcohol by a Bamberger type rearrangement at elevated temperature, advantageously by carrying out the catalytic hydrogenation under elevated pressure.

REFERENCES:
patent: 3953510 (1976-04-01), Smith et al.
patent: 4625062 (1986-11-01), Nagata et al.
CA:88:169698m Tsenyuga et al., (1978, Jun.).

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