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The Preparation of Sodium 4-Amino-3-nitrobenzenesulfonate and Some Related Compounds
Rosevear, Judi,Wilshire, John F. K.
, p. 1727 - 1732 (2007/10/02)
The sodium salt of 4-amino-3-nitrobenzenesulfonic acid (o-nitroaniline-p-sulfonic acid) has been prepared by the action of dilute sodium hydroxide solution on ethyl carbamate.Central to this synthesis is the finding that the N-ethoxycarbonyl group, when located ortho to a nitro group (but not to a bromo group), is readily removed by dilute sodium hydroxide solution.
