Phase-Transfer Esterification of the Alkali Metal Salts of Cephalosporins and Penicillins
作者:Iñaki Ganboa、Claudio Palomo
DOI:10.1055/s-1986-31474
日期:——
Cephalosporins and penicillins can be converted into their alkyl esters in high yields by reaction of their solid sodium or potassium salts with alkyl bromides in acetonitrile in the presence of crown ethers as phase-transfer catalysts.