Substituted cyclopentenes, their preparation and their use for chiral scaffolds
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United States of America Patent
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Jul 15, 2003
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N/A
app pub date -
Sep 11, 2000
filing date -
Sep 9, 1999
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Expired
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Abstract
3,4-Disubstituted-1-cyclopentene compounds, in substantially enantiopure form, have the relative stereochemistry according to formula (1A) or (1B) ##STR1## including the opposite enantiomers thereof, wherein R.sup.1 is either COOX, wherein X is selected from the group consisting of alkyl, H, and a salt-forming cation, or CH.sub.2 OH, whererin the hydroxy group is optionally protected; R.sup.2 is H or a protecting group; R.sup.3 is H or alkyl, and R.sup.4 is selected from the group consisting of H, alkoxy, alkyl, aryl, and aralkyl; or, in the case of formula (1A), R.sup.2 and R.sup.4 are linked to form an oxazolidonone ring. These compounds can be used to prepare a series of complementary stereochemcially varied cyclopentane scaffolds.
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