Process for the oxidation of secondary amines into the corresponding nitroxides
AssigneeBASF SE
InventorsPeter Nesvadba, Lucienne Bugnon, Martin Von Büren
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Abstract
The invention relates to a process for the preparation of secondary nitroxide radicals from their corresponding secondary amines by oxidation with an organic peracid, comprising the steps a) adding to a reaction vessel a secondary amine, optionally together with an organic solvent and in one batch a base selected from the group consisting of alkali metal, alkaline earth metal or ammonium bicarbonates and alkaline earth metal or ammonium carbonates or mixtures thereof in the form of a solid together with water or as an aqueous slurry; b) dosing a peracid under stirring to the reaction mixture in an amount of 1.0 to 2.5 mol per mol of secondary amine; and c) isolating the organic phase.
Claims17
A process for the preparation of secondary nitroxide radicals from their corresponding secondary amines by oxidation with an organic peracid, comprising the steps of:
- a) forming a reaction mixture by adding to a reaction vessel a secondary amine and in one batch either
- an amount of water together with solid NaHCO3, KHCO3, or a mixture thereof;
- or
- an aqueous slurry of NaHCO3, KHCO3, or a mixture thereof;
- and
- b) dosing a peracid to the reaction mixture in an amount of 1.0 to 2.5 mol per mol of secondary amine.
A process for the preparation of secondary nitroxide radicals from their corresponding secondary amines by oxidation with an organic peracid, said process comprising the steps of:
- a) forming a reaction mixture by adding to a reaction vessel a secondary amine and in one batch solid NaHCO3, KHCO3, or a mixture thereof;
- and
- b) dosing a peracid to the reaction mixture in an amount of 1.0 to 2.5 mol per mol of secondary amine;
- wherein said forming and said dosing are done in the absence of water.
Dependencies are inferred from the claim text.