The ring expansion of penama to cephams: a possible biomimetic process
作者:Jack E. Baldwin、Robert M. Adlington、Tae Won Kang、Eun Lee、Christopher J. Schofield
DOI:10.1016/s0040-4020(01)81453-8
日期:1988.1
Reaction of a 2β-bromomethyl penam with triphenyltin hydride gave, via ringexpansion of the derived 2β-methyl radical, the corresponding cepham system; a similar process may be in operation during the biosynthetic ringexpansion of penicillin N to deacetoxycephalasporin C.1