18598-31-7Relevant articles and documents
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Petrzilka et al.
, p. 2911,2923 (1977)
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Process for preparing cephem lactones for cephalosporin-type antibiotics
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, (2008/06/13)
Cephem lactones of formula (1) STR1 wherein R1 is hydrogen or an organic substituent of the type appearing as the 6-substituent of penicillins or as the 7-substituent of cephalosporins are produced from corresponding 4,5-halohydrin precursors thereof by dehalogenation. Novel stereoisomers of formula (1) compounds as well as novel intermediates for cephem lactone syntheses are disclosed. The cephem lactones produced according to the invention are of utility as intermediates for cephem-type antibiotics and have antibiotic properties of their own.