Preparation of substituted aromatic amines
AssigneeMonsanto Company
InventorA. John Solodar
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Abstract
A process for the preparation of substituted aromatic amines comprising (1) contacting a primary aromatic amine with an oxidizing agent in a homogeneous solution containing water, an oxidizable water-miscible organic solvent and a base, and (2) reducing the solution with a reducing agent to produce the substituted aromatic amine.
Claims13
A process for the preparation of substituted aromatic amines of the formula ##STR3## wherein n equals from 2 to 5, R.sub.1 and R.sub.2 are either the same or different aliphatic radicals or hydrogen, which comprises (1) contacting a primary aromatic amine with an alkali metal ferricyanide oxidizing agent in a homogeneous solution containing water, and oxidizable water-miscible organic solvent and a base, and (2) reducing the solution with a reducing agent to produce the substituted aromatic amine.
A process for the preparation of 4-aminodiphenylamine or 2-aminodiphenylamine or a mixture thereof comprising (1) contacting aniline with an alkali metal ferricyanide oxidizing agent in a homogeneous solution containing water and an alcohol selected from the group consisting of methanol, ethanol, 1-propanol and 2-propanol and a base at a temperature below 35.degree. C., and (2) reducing the solution using catalytic reduction to produce the 4-aminodiphenylamine or 2-aminodiphenylamine or the mixture thereof.
Dependencies are inferred from the claim text.