Disulfide substituted oxazetidine derivatives

Details Disulfide substituted oxazetidine derivatives Disulfide substituted oxazetidine derivatives

1981-01-26

1990-06-05

Ceperley, Mary E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540223, 540229, 540230, C07D50114

Patent

active

049315552

ABSTRACT:
A process for producing a 2-cephem or 3-cephem derivative compound of the formula: ##STR1## wherein R.sub.1 represents a substituted or unsubstituted amino radical and R.sub.4 represents hydrogen or a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, and the dotted line indicates the alternate bond structure providing 3-cephem or 2-cephem, which comprises:

REFERENCES:
patent: 3963712 (1976-06-01), Koyama et al.

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