Process for the preparation of atovaquone
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United States of America Patent
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Issued Date -
Apr 23, 2009
app pub date -
Sep 10, 2008
filing date -
Sep 11, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a process for the preparation of atovaquone exhibiting characteristic peaks (expressed in degrees 2θ±0.2°θ) at approximately one or more of the positions: about 7.0, 9.7, 14.2, 14.8, 17.0, 19.2, 20.4, 22.1, 22.7, 26.9 and 28.7, which comprises: (a) providing a solution comprising atovaquone in an aprotic polar solvent; (b) adding a suitable antisolvent to precipitate atovaquone; and (c) isolating the precipitate.
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