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US 2009/0221850 A1Published application
Method for preparing alkoxyamines by photolysis of dithiocarbamates
OwnerDenis Bertin, Jean-Luc Couturier +3inventors
InventorsDenis Bertin, Jean-Luc Couturier, Didier Gigmes, Olivier Guerret, Yohann Guillaneuf
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Abstract
The present invention relates to a novel process for preparing alkoxyamines from a nitroxide and a dithiocarbamate by photolysis reaction. This process, which does not generate effluent containing metals, may be carried out in batch or in continuous mode and takes place at a lower temperature than the known processes for synthesizing alkoxyamines.
Claims17
Process for preparing alkoxyamines of formula R1ONR2R3 by photolysis reaction of a dithiocarbamate with a nitroxide according to the scheme:
- where R1 is an aromatic, non-aromatic, cyclic, non-cyclic, linear or branched, hydrocarbon-based radical and which may contain first hetroatoms, or alkali metals;
- R2 and R3 are aromatic, non-aromatic, cyclic, non-cyclic, linear or branched, hydrocarbon-based radicals, which may be identical or different, having from 1 to 30 carbon atoms which may contain second hetroatoms R2 and R3 possibly being connected to form cyclic structures with the nitrogen atom;
- and
- R4 and R5 are aromatic, non-aromatic, cyclic, non-cyclic, linear or branched, hydrocarbon-based radicals, which may be identical or different, having from 1 to 18 carbon atoms, R4 and R5 possibly optionally forming cyclic structures with the nitrogen atom, followed by a step of purifying the alkoxyamine obtained.
1 more element
Dependencies are inferred from the claim text.