Process for preparing 2-aminopyridine derivatives
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United States of America Patent
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May 22, 2007
Grant Date -
Mar 2, 2006
app pub date -
Aug 23, 2005
filing date -
Aug 31, 2004
priority date (Note) -
Expired
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Abstract
A method for preparing 2-aminopyridine derivatives, which comprises substituting of fluorine for hydrazine moiety and reducing with hydrogen using 3-substituted-2,5,6-trifluoropyridine as a starting material, provides 2-aminopyridine derivatives having a purity over 98% under a mild reaction condition.
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