3,3-Di(acylthio)-2(4-allylthioazetidin-2-on-1-yl)propenoic acid ester compounds
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United States of America Patent
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Jul 2, 1985
Issued Date -
N/A
app pub date -
Aug 22, 1983
filing date -
Nov 6, 1980
priority date (Note) -
Expired
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Abstract
What are disclosed are compounds, useful as intermediates in the preparation of substituted penem compounds, of the formula ##STR1## wherein R is a removable esterifying group, R.sup.1 is lower alkyl or phenyl, R.sup.2 is hydrogen, lower alkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, or tri-lower alkylsilyloxyalkyl, and R.sub.a, R.sub.b, R.sub.c, R.sub.d, and R.sub.e are hydrogen, aliphatic cycloaliphatic hydrocarbon, free or esterified carboxyl, halo, or cyano, and any two of R.sub.a -R.sub.e, taken together, may form a cycloaliphatic ring.
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