Process for the preparation of {2-[4-α-phenyl-p-chlorobenzyl)piperazin-1-yl]ethoxy} acetic acid and novel intermediates therefor
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United States of America Patent
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Jun 21, 2005
Grant Date -
May 15, 2003
app pub date -
Nov 29, 2000
filing date -
Nov 30, 1999
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Abstract
The invention refers to a novel process for the preparation of {2-[-(α-phenyl-p-chlorobenzyl)piperazin-1-yl]ethoxy}acetic acid, which comprises hydrolyzing an N,N-disubstituted {2-[-(α-phenyl-p-chlorobenzyl)piperazin-1-yl]ethoxy}acetamide, wherein said substituents are selected from alkyl groups having 1 to 4 carbon atoms optionally substituted by a phenyl group, alkenyl groups having 2 to 4 carbon atoms or cyclohexyl groups, or the substituents together with the adjacent nitrogen atom of the acetoamido group, form a morpholino group.
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