3-(1-hydroxy-pentylidene)-5-nitro-3H-benzofuran-2-one a process for the preparation thereof and the use thereof
AssigneeClariant (France) S.A.
InventorsAlain Schouteeten, Francoise Mordacq
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Abstract
A product corresponding to formula (I) or its ketonic tautomer form (II) 1 which is 3-(1-hydroxy-pentylidene)-5-nitro-3H-benzofuran-2-one, a process for the preparation and use of the product corresponding to formula (I) or its tautomeric form (II), a process for the preparation and use, particularly for the production of synthesis intermediates.
Claims13
A product corresponding to formula (I) or its ketonic tautomer form (II) 4 5
A process for the preparation of the product corresponding to formula (I) or (II), characterised in that 5-nitro-3H-benzofuran-2-one is reacted, at a temperature above 30° C., with pentanoic anhydride and a salt of pentanoic acid, optionally in the presence of pentanoic acid, then the resulting reaction mixture is acidified, and then the expected product is isolated.
The use of the product corresponding to formula (I) or of its tautomeric form (II) for the production of synthesis intermediates.
The use of the product corresponding to formula (I) or of its tautomeric form (II) for the production of 2-butyl-5-nitro-benzofuran-2-one.
Dependencies are inferred from the claim text.