Epoxidation of 17-oxo-15,16-Methylene Steroids with Sulfoxonium Ylides
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United States of America Patent
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Issued Date -
Mar 27, 2008
app pub date -
Sep 21, 2007
filing date -
Sep 22, 2006
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Abandoned
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Abstract
A process for the epoxidation of 17-oxo-15,16-methylene steroids, in particular of drospirenone precursors, comprising the use of sulfoxonium ylides, in particular of dimethylsulfoxonium methyl ylide. The process allows to prepare in good yields 17-spiro epoxides, which can be easily transformed into 17-spironolacto-steroids.
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