process for the preparation of ester 1 - etossicarbonilossieti metallic acid 6 - d (-) - alpha aminoalfa fenilacetamido - penicillanico

摘要

The novel compound alpha -bromodiethylcarbonate, its use in the preparation of 1-ethoxycarbonyloxyethyl esters of penicillins and cephalosporins, in particular bacampicillin, and improvements in the method for preparing such esters.