Nitrosation method of a phenolic composition substituted by an electro-attracting group and use thereof

摘要

The invention concerns a method of nitrosation of a phenolic compound substituted by an electro-attracting group.The invention also concerns a method of nitration of a phenoic compound substituted by an electro-attracting group. The nitrosation method is characterised in that it consists in effecting the nitrosatio n of the said compound in presence of sulphuric acid; the concentration of the sulphuric acid being at least 60 % by weight, then optionally in effecting the separation of the resulting nitrosated compound. The invention also concerns the oxidation of the resulting p-nitrosated phenolic compound for obtaining the corresponding nitrated compound.