Optically active carbacyclin intermediates and processes for the preparation thereof
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United States of America Patent
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Dec 5, 1989
Issued Date -
N/A
app pub date -
Dec 19, 1988
filing date -
Jun 4, 1985
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Expired
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Abstract
New intermediate, an optically active (1S,5R)-7,7-alkylenedioxy-2-alkoxycarbonylbicyclo[3.3.0]octan-3-one which is useful for the synthesis of an optically active carbacyclin. This intermediate is prepared, as a non-reduced compound, from a racemic compound, (1SR,5RS)-7,7-alkylenedioxy-2-alkoxycarbonyl-cis-bicyclo[3.3.0]octan-3-one, by treatment of the racemic compound with a microorganism. The microorganism has an ability of specifically reducing the keto group of the (1R,5S) epimer of the racemic compound.
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