Stable crystal of thiazolidinedione derivative and process for producing the same
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United States of America Patent
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Aug 3, 2004
Grant Date -
Jun 5, 2003
app pub date -
Oct 22, 2002
filing date -
Apr 25, 2000
priority date (Note) -
Expired
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Abstract
A homogeneous crystal having excellent stability which is suitable for the industrial-scale production of 5-[(2,4-dioxothiazolidin-5-yl)methyl]-2-methoxy-N-[[4-(trifluoromethyl)phenyl]methyl]benzamide (KRP-297). The novel crystal of KRP-297 is produced through recrystallization from an alcohol solvent. It is characterized by having diffraction angles (2.theta.) at at least 9.7.degree., 15.0.degree., and 22.5.degree. in X-ray powder diffractometry.
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