Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-03-06
2009-08-25
Saeed, Kamal A (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C548S100000, C548S215000, C548S217000, C548S237000
Reexamination Certificate
active
07579478
ABSTRACT:
The present invention provides processes for the purification of substituted benzoxazole compounds, and in particular 2-(3-fluoro-4-hydroxy-phenyl)-7-vinyl-benzooxazol-5-ol. The processes include recrystallizing the compound from a solution comprising acetone and acetonitrile; treating the crude purified product with a clarifying agent in a solution comprising ethyl acetate, and precipitating or triturating the compound from a mixed solvent system.
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Pepper Hamilton LLP
Saeed Kamal A
Shterengarts Samantha L
Wyeth
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