Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1986-03-13
1988-04-26
Berch, Mark L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549215, 549548, 556419, 560250, C07D20508, C07D30348, C07D30124, C07F 718
Patent
active
047405953
ABSTRACT:
A multistep process is disclosed for preparing azetidinone intermediates used in the making penems and carbapenems wherein intermediates containing ##STR1## R' is independently hydrogen or 1, 2 or 3 of lower alkyl or lower alkoxy, preferably hydrogen, wherein R" is methyl, ethyl, a phenyl or alkyl, preferably ethyl, as a readily removable nitrogen protecting group are made.
REFERENCES:
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Berch Mark L.
Hoffman Thomas D.
Rosen Gerald S.
Schering Corporation
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