2'-protected 3'-dimethylamine, 9-etheroxime erythromycin A derivatives
 A process of preparing a 6-O-methyl erythromycin A derivative using a 2'-protected, 9-etheroxime erythromycin A intermediate is provided. A preferred protecting group for the 2'-position is acetyl. 2'-protected, 9-etheroxime erythromycin A derivatives are also provided. Also disclosed is a method for inhibiting quaternary salt formation at the 3' amine without the need for 3'N-protecting groups. 
Abbott Laboratories
C Y
C07H Y02P
inventional additional
Yi-Yin Hemantkumar H. Chengxi Jih-Hua
Ku Patel Yang Liu