N-substituted 2-azetidinones
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United States of America Patent
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May 2, 1995
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N/A
app pub date -
Dec 13, 1993
filing date -
Apr 23, 1993
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Expired
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Abstract
Novel cis compound having the formula: ##STR1## wherein R.sup.1 is alkyl, haloalkyl, cycloalkyl, aryl or a carbohydrate derivative; X is O, N, S, C(O)O or a direct bond; and R.sup.2 is aryl, substituted aryl or heteroaryl are useful in the synthesis of taxol and taxol derivatives.
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