Patent ID: 6855842

Claim:
A process for preparing nitroaromatic compounds with formula(I): wherein: R 1 represents a linear or branched alkyl group containing 1 to 12 carbon atoms, a phenyl group optionally substituted by an allyl group containing 1 to 4 carbon atoms, or a halogenophenyl group; R 2 represents a hydrogen atom, or a hydrocarbon group containing 1 to 12 carbon atoms, being a linear or branched alkyl group, a cycloalkyl group, a phenyl group or a phenylalkyl group; Z represents an oxygen or sulfur atom; R represents a hydrogen atom or a group selected form the group consisting of: a hydroxyl group; a linear group containing 1 to 6 carbon atoms; an alkoxy group containing 1 to 6 carbon atoms; an ester group containing 1 to 10 carbon atoms; an alkylamide group containing 1 to 6 carbon atoms; a carboxamide group; a halogen atom; and a trifluoromethyl group; and n is a number equal to 1, 2 or 3; said process comprising the step of carrying out a selective nitration in position 4 of a stating aromatic compound, using a source of NO2 + , in the presence of sulfuric acid, the starting aromatic compound having the following formula (II): wherein R, R 1 , R 2 , Z and n have the meanings given above.