3-amino-2-oxo-azetidine-1-sulfonic acids
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United States of America Patent
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Oct 15, 1991
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N/A
app pub date -
Mar 3, 1989
filing date -
Oct 23, 1981
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Abstract
Novel syn isomers of reacemates and optical isomers of 3-amino-2-oxo-azetidine-1-sulfonic acids of the formula ##STR1## wherein R is difluoromethyl, R.sub.1 is --(CH.sub.2).sub.n --X, n is an integer from 1 to 4, X is selected from the group consisting of halogen, --CN, --OR.sub.1 ', --SR.sub.1 ', azido, thiocyanate, isothiocyanate, and ##STR2## R.sub.1 ' is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms, R.sub.1 ' is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and a heterocycle and R' and R' are individually selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and taken together with the nitrogen to which they are attached form a heterocycle and A.sup.1 is selected from the group consisting of hydrogen, and metal cations and their nontoxic, pharmaceutically acceptable acid addition salts, the wavy line indicating the cis form, trans form or cis trans forms having antibiotic properties.
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