Effecting condensation of nitrohaloarene and formyl derivative of a primary aromatic amine with alkali metal hydroxide
AssigneeMonsanto Company
InventorRobert L. Wright
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Abstract
Preparation of nitrodiarylamine by reacting alkali metal hydroxide, activated aromatic amine and nitrohaloarene is described.
Claims11
The process which comprises forming nitrodiarylamine by gradually mixing aqueous alkali metal hydroxide with the formyl derivative of an aromatic primary amine and reactive nitrohaloarene at condensation temperature for forming nitrodiarylamine and concurrently removing water, wherein the aqueous alkali metal hydroxide is added at a rate slow enough to avoid substantial buildup of water.
The process which comprises forming nitrodiarylamine by gradually mixing at condensation temperature for forming nitrodiarylamine
- (A) formanilide or formanilide substituted in the benzene nucleus with one or more alkyl, alkoxy, fluoro, nitro, or chloro substituents,
- (B) nitrohalobenzene and
- (C) aqueous alkali metal hydroxide and concurrently removing water,
- wherein (C) is gradually added to a reactor at condensation temperature, (A) and (B) independently either being present in the reactor or added concurrently with (C), and (C) is added at a rate slow enough to avoid substantial buildup of water.
Dependencies are inferred from the claim text.