Process for purification of a cephalosporin derivative
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United States of America Patent
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Nov 30, 2004
Grant Date -
Nov 6, 2003
app pub date -
Sep 30, 2002
filing date -
Apr 2, 1998
priority date (Note) -
Expired
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Abstract
A process for the purification of cefixime via a novel tert-octylamine salt of a cefixime intermediate of formula V ##STR1## which may be crystalline and which may be produced in a one-pot reaction from 7-amino-3-vinyl-ceph-3-em-4-carboxylic acid.
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