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US 4,056,521 AGranted
Penam and cepham derivatives and preparation thereof
AssigneeFujisawa Pharmaceutical Co., Ltd.
InventorsTakashi Kamiya, Tsutomu Teraji, Masashi Hashimoto, Osamu Nakaguti, Teruo Oku
Life of this patent
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Abstract
Disclosed are antibacterial penicillins of the formula ##STR1## wherein Y" is a residue of a strong nucleophile and processes for preparing same.
Claims6
A compound of the general formula:
- ##STR252## wherein R.sup.1 is a conventional, pharmaceutically acceptable acylamino, R.sup.2 is carboxy or a conventionally protected carboxy, X is --S-- or ##STR253## R.sup.3 is lower alkyl and Y" is arylamino.
Dependencies are inferred from the claim text.