“4,7-lactams”, intermediates for penems synthesis. I. skeletal conversion of penicillanic acid to (+)-2,2,5,5-tetramethyl-9-oxo-3-oxa-6-thia-azabicyclo[5,2,01,7]nonane
Simple .beta.-lactam compounds derived from 6-aminopenicillanic acid
作者:John C. Sheehan、Seiji Shibahara、Elsie Chacko
DOI:10.1021/jm00181a020
日期:1980.7
As part of a general program of structural modification in beta-lactam antibiotics, we have synthesized several simple penicillins from 6-aminopenicillanic acid where the C-3 carboxyl group has been replaced by a hydroxy or an acetoxy group and the C-6 side chain has been substituted by bromine or hydrogen. Some of the compounds exhibit mild activity against the Gram-positive strain Bacillus subtilis