4-cyclohexenyl azetidinone derivatives
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United States of America Patent
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Jul 6, 1993
Grant Date -
N/A
app pub date -
Mar 6, 1992
filing date -
Mar 7, 1991
priority date (Note) -
Expired
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Abstract
Compounds of formula ##STR1## in which R.sub.1 represents a hydrogen atom or a hydroxyl protecting group; R.sub.2 represents a hydrogen atom or a trialkylsilyl group, and --X--Y-- represents the epoxide group (A) or the alkene group (B). ##STR2## wherein R.sub.3 represents a C.sub.1-6 alkyl group optionally substituted by halogen or an optionally substituted phenyl group, useful as intermediates in the preparation of antibacterially active compound.
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