SAKO M.; MAKI Y., CHEM. AND PHARM. BULL., 1978, 26, NO 4, 1236-1239
作者:SAKO M.、 MAKI Y.
DOI:——
日期:——
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