Mixed solvate of olanzapine, method for preparing it and method for preparing form I of olanzapine therefrom
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United States of America Patent
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Jul 20, 2010
Grant Date -
Nov 13, 2008
app pub date -
Jul 7, 2005
filing date -
Jul 27, 2004
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Abstract
Said mixed solvate is a solvate of olanzapine/water/tetrahydrofuran in the proportion 1:1:1/2 (I). The method for preparing said solvate comprises treating a crude anhydrous olanzapine with a mixture of tetrahydrofuran/water. The method for preparing Form I of olanzapine includes desolvating the mixed solvate of formula I, by means of drying, in vacuo and under temperature-controlled conditions.
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