C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 213/89 (2006.01)
Patent
CA 2183869
The present invention relates to a process for the preparation of 1-hydroxypyridones of the formula I (I) Image in which R is a phenyl radical or phenoxy radical which can be substituted as indicated in claim 1, from the corresponding pyrones with hydroxylamine or a hydroxylammonium salt.
L'invention concerne un procédé de préparation de 1-hydroxypyridones de la formule générale (I), dans laquelle R désigne un reste phényle ou phénoxy pouvant être substitué comme mentionné dans la revendication 1, à partir des pyrones correspondants avec de l'hydroxylamine ou un sel d'hydroxylammonium.
Delpy Klaus
Koch Peter
Schrod Manfred
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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