Process for the preparation of p-nitroaniline compounds by the a

Details Process for the preparation of p-nitroaniline compounds by the a Process for the preparation of p-nitroaniline compounds by the a

1978-08-09

1979-04-24

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260575, 260578, 260701, C07C 8526

Patent

active

041512030

ABSTRACT:
Process for the preparation of certain substituted p-nitroaniline compounds essentially free of the corresponding o-nitroaniline compounds. The process comprises subjecting an alkanol solution of the anilides of such compounds to alkaline hydrolysis conditions, thereby effecting hydrolysis and precipitation of the p-nitroaniline compound essentially free of the undesired o-isomer. The compounds are intermediates useful in the preparation of azo pigments.

REFERENCES:
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Henderson et al., "J. Org. Chem.," vol. 42 (25), pp. 3989-3994, (1977).
Ayrey et al., "J. Chem. Soc. B," vol. 4, pp. 738-739, (1970).
Kuellertz et al., "Tetrahedron," vol. 32(6), pp. 759-761, (1976).
Vinnik et al., "Chem. Ab.," vol. 67, Ab. No. 21218a, (1967).
Medvetskaya et al., "Chem. Ab.," vol. 71, Ab. No. 129246e, (1969).
Vinnik et al., "Chem. Ab.," vol. 84, Ab. No. 179235q, (1976).

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