N. Grigan et al., A SIMPLE PREPARATIVE METHOD FOR TERT-BUTYL PROTECTION OF AMINOCEPHALOSPORANIC ACID, Synthetic communications, 26(6), 1996, pp. 1183-1185
A convenient and effective synthesis of the tert-butyl esters of 7-ami
nocephalosporanic acid, 7-aminodeacetoxycephalosporanic acid and 6-ami
nopenicillanic acid using tert-butylacetate and boron trifluoride ethe
rate is described.