(3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-6-[(2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-14-ethyl-12,13-dihydroxy-4-[(2S,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-7-methoxy-3,5,7,9,11,13-hexamethyl-oxacyclotetradecane-2,10-dione 在
4-二甲氨基吡啶 、
氨 、
sodium hexamethyldisilazane 、
三乙胺 作用下,
以
四氢呋喃 、
N,N-二甲基甲酰胺 为溶剂,
反应 98.5h,
生成
benzoic acid 4-dimethylamino-2-(4-ethyl-8-hydroxy-11-methoxy-3a,7,9,11,13,15-hexamethyl-2,6,14-trioxo-tetradecahydro-3,5-dioxa-1-aza-cyclopentacyclotetradecen-10-yloxy)-6-methyl-tetrahydro-pyran-3-yl ester