(E)-erythromycin A oxime 在
氢氧化钾 、
对甲苯磺酰氯 作用下,
以
水 、
丙酮 为溶剂,
以60%的产率得到(1R,2R,3R,6R,7S,8S,9R,10R,12R,16S)-9-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-3-ethyl-2,10-dihydroxy-7-[(2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-2,6,8,10,12,16-hexamethyl-4,15-dioxa-14-azabicyclo[11.2.1]hexadec-13-en-5-one