Package making
Patent
1985-04-22
1987-07-28
Shaver, Paul F.
Package making
556418, 540350, C07C11300
Patent
active
046832963
ABSTRACT:
A new process is provided for preparing the key carbapenem intermediates of the formula ##STR1## wherein R.sup.5 and R.sup.6 each independently represent hydrogen or methyl and R.sub.1 represents a conventional carboxyl-protecting group.
REFERENCES:
patent: 4444685 (1984-04-01), Amato et al.
patent: 4525582 (1985-06-01), Amato et al.
Roberge Guy
Ueda Yasutsugu
Bristol-Myers Company
Morse David M.
Shaver Paul F.
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