Method for producing biperiden IV
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United States of America Patent
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Mar 10, 2009
Grant Date -
Sep 23, 2004
app pub date -
May 17, 2002
filing date -
May 18, 2001
priority date (Note) -
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Abstract
The invention relates to a method for producing biperiden by reacting exo-1-(bi-cyclo[2.2.1]hept-5-en-2-yl)-3-piperidino-1-propanone with a phenylmagnesium compound. According to the invention, exo-1-(bi-cyclo[2.2.1]hept-5-en-2-yl)-3-piperidino-1-propanone can be obtained by reacting the exo-ether of enol silylene of formula (IV) with a compound of N-methylenepiperidinium.
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