Transformations of penicillin. Part I. Preparation and rearrangements of 6β-phenylacetamidopenicillanic sulphoxides
作者:D. H. R. Barton、F. Comer、D. G. T. Greig、P. G. Sammes、C. M. Cooper、G. Hewitt、W. G. E. Underwood
DOI:10.1039/j39710003540
日期:——
The isomeric sulphoxides of 6β-phenylacetamidopenicillanic acid esters and N-t-butyl-amides have been prepared. The (R)-sulphoxides can be thermally converted into the (S)-isomers. Deuterium labelling showed that the isomerisation proceeds via a sulphenic acid intermediate. Rearrangement of the sulphoxides with acetic anhydride produces mainly the corresponding acetoxypenams and acetoxycephams. Both