Racemisation process for use in the manufacture of levobupivacaine and related piperidinecarboxanilide anaesthetic agents
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United States of America Patent
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May 7, 2002
Grant Date -
Apr 26, 2001
app pub date -
Dec 18, 2000
filing date -
Jan 18, 1995
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Abstract
An optically-enrichedpiperidine-2-carboxanlidecompound, in which the piperidine is optionally N-alkylated, is racemized by heating the compound in an aqueous medium, provided that the medium includes an organic co-solvent if the compound is N-alkylated. This process is particularly valuable, in conjunction with a resolution process, for the manufacture of levobupivacaine.
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