PREPARATION OF LAMIVUDINE FORM I
A thermodynamically controlled process for preparing Form I polymorph of lamivudine is described, wherein the process involves crystallizing Form I at a temperature of from about 00C to about 500C from a mixture which comprises (a) lamivudine or an acid salt thereof or both, (b) a solvent system com...
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Main Authors | , , , |
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Format | Patent |
Language | English French |
Published |
18.08.2011
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Subjects | |
Online Access | Get full text |
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Summary: | A thermodynamically controlled process for preparing Form I polymorph of lamivudine is described, wherein the process involves crystallizing Form I at a temperature of from about 00C to about 500C from a mixture which comprises (a) lamivudine or an acid salt thereof or both, (b) a solvent system comprising water and at least one organic solvent, and optionally (c) Form I seed; wherein, when a lamivudine acid salt is employed in the mixture, the crystallizing step is conducted in the presence of a base; and wherein the water activity of the solvent system is maintained in a range in which Form I is thermodynamically the most stable form of lamivudine. |
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Bibliography: | Application Number: CA20112789078 |