Azetidinone derivatives
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United States of America Patent
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Oct 14, 1980
Issued Date -
N/A
app pub date -
Sep 8, 1977
filing date -
Sep 9, 1976
priority date (Note) -
Expired
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Abstract
.beta.-Lactam compounds of the formula (I) ##STR1## (wherein R represents an esterified carboxyl group, --NR.sup.1 R.sup.2 R.sup.3 represents the residue of a nitrogen base, and R.sup.4 represents a hydrogen atom, a hydroxyl group or acylated or etherified hydroxyl group or the residue of a sulphur nucleophile) are disclosed, together with processes for their preparation. The compounds are valuable intermediates for the preparation or purification of further .beta.-lactam compounds having .beta.-lactamase inhibitory activity.
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