Method for preparing polymorphism of irinotecan hydrochloride
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United States of America Patent
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Feb 10, 2009
Grant Date -
Oct 19, 2006
app pub date -
Feb 24, 2004
filing date -
Feb 25, 2003
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Abstract
A method for preparing a novel crystalline polymorphic irinotecan hydrochloride which is excellent in the solubility in water and reduced in the content of impurities is provided. A method for preparing c-type crystals of irinotecan hydrochloride having diffraction peaks (2θ) at 9.15°, 10.00°, 11.80°, 12.20°, 13.00° and 13.40° in the powder X-ray diffractometry characterized by mixing irinotecan with one or more solvents selected from the group consisting of acetone, acetonitrile and tetrahydrofuran, adding hydrochloric acid, and collecting the formed crystals.
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