Process for preparing antifungal V-28-3M
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United States of America Patent
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Feb 12, 2002
Grant Date -
N/A
app pub date -
Dec 3, 1999
filing date -
Jun 3, 1997
priority date (Note) -
Expired
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Abstract
An industrially suitable process for preparing V-28-3M useful as an antimycotic agent by conducting methyl esterification of V-28-3 efficiently. V-28-2 is efficiently converted into V-28-3M by protecting the amino group of the amino sugar of V-28-3 with an appropriate protecting group, subjecting the carboxyl group of V-28-3 to methyl esterification with methyl methanesulfonate or methyl p-toluenesulfonate in the presence of a base, and deprotecting the N-protected intermediate.
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