[(2S,3S,4R,5S,6S)-2-(benzenesulfinyl)-3-[tert-butyl(dimethyl)silyl]oxy-5-methoxy-6-methyloxan-4-yl]oxy-tert-butyl-dimethylsilane 、
methyl (2E,4E,6E,8R,9R,10E,12E,16S,17S)-16-[tert-butyl(dimethyl)silyl]oxy-18-[(4S,5R)-5-[(2R,3R,4S,5S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-2-methoxy-6-[(2R)-3-methoxy-2-triethylsilyloxypropyl]-3,5-dimethyloxan-2-yl]-2-oxo-1,3-dioxolan-4-yl]-9-hydroxy-17-methoxy-2,4,6,8,12-pentamethyloctadeca-2,4,6,10,12-pentaenoate 在
2,6-二叔丁基-4-甲基吡啶 、
三氟甲磺酸酐 作用下,
以
乙醚 为溶剂,
反应 1.5h,
以65%的产率得到methyl (2E,4E,6E,8R,9R,10E,12E,16S,17S)-9-[(2R,3S,4R,5S,6S)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]-5-methoxy-6-methyloxan-2-yl]oxy-16-[tert-butyl(dimethyl)silyl]oxy-18-[(4S,5R)-5-[(2R,3R,4S,5S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-2-methoxy-6-[(2R)-3-methoxy-2-triethylsilyloxypropyl]-3,5-dimethyloxan-2-yl]-2-oxo-1,3-dioxolan-4-yl]-17-methoxy-2,4,6,8,12-pentamethyloctadeca-2,4,6,10,12-pentaenoate