Methods for the manufacture of quinolone carboxylic acids derivatives and intermediates thereof
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United States of America Patent
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Jun 22, 1999
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N/A
app pub date -
Mar 11, 1998
filing date -
Mar 11, 1997
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Expired
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Abstract
Novel process for the preparation of quinolone carboxylic acid derivatives of general formula I, and intermediates thereof as illustrated in Scheme 1 wherein the key intermediate is a compound of formula IX. ##STR1##
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