Kukolija, S Synthesis of 3-hydroxy-, 3-chloro-, and 3-methoxy-3-cephems from penicillins via 4-dithio-2-azetidinone intermediates. [electronic resource] - The Journal of organic chemistry Jun 1976 - 2276-9 p. digital Publication Type: Journal Article ISSN: 0022-3263 Standard No.: 10.1021/jo00875a013 doi Subjects--Topical Terms: AzetidinesAzetinesCephalosporins--chemical synthesisChlorineHydroxylationMethylationPenicillins