Processing method of lactionization in the preparation of statins
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United States of America Patent
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Jun 14, 2005
Grant Date -
Jun 12, 2003
app pub date -
Nov 14, 2002
filing date -
Dec 3, 2001
priority date (Note) -
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Abstract
The present invention relates to a processing method for preparing lovastatin and simvastatin which comprises the steps of (1) performing lactonization of mevinic acid and its homologous compounds in the presence of a mixed organic solvent without an acid catalyst through nitrogen sweep; and (2) making crystals. In the process of the present invention, lovastatin and simvastatin highly purified can be produced in a high yield and especially, heterodimers formed as a by-product can be reduced remarkably. Therefore, the processing method of the present invention can be convenient and economical.
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