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Reactions of cephalosporin sulphones 1. Rearrangement of the β-lactam ring to a triazole derivative

✍ Scribed by Tamás E Gunda; László Tamás; Szabolcs Sályi

Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 199 KB
Volume: 39
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(98)00358-x

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✦ Synopsis

The 71&-amino-cephalosporin sulphones, generated in situ from the appropriate 7[5-tBoe-amino derivative and diazotized in a une-pot reaction in aq. HCIO4 -MeOH -NaNO2, rearrange exclusively to the triazoles $ in a multistep reaction.

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