benzyl (7,8-di-O-benzyl-4,5-di-O-tert-butyldimethylsilyl-3-deoxy-D-manno-oct-1-ulopyrano-syl)onate fluoride 、 [(2R,3S,4R,5R,6S)-2-[[(2R,3R,4R,5S,6R)-3-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-5-hydroxy-4-[(3R)-3-tetradecanoyloxytetradecanoyl]oxy-6-(triethylsilyloxymethyl)oxan-2-yl]oxymethyl]-3-phenylmethoxy-6-prop-2-enoxy-5-[[(3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoyl]amino]oxan-4-yl] (3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoate 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
以89%的产率得到benzyl (2R,4R,5S,6R)-6-[(1R)-1,2-bis(phenylmethoxy)ethyl]-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-[[(2R,3S,4R,5R,6R)-5-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-3-hydroxy-6-[[(2R,3S,4R,5R,6S)-3-phenylmethoxy-6-prop-2-enoxy-5-[[(3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoyl]amino]-4-[(3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoyl]oxyoxan-2-yl]methoxy]-4-[(3R)-3-tetradecanoyloxytetradecanoyl]oxyoxan-2-yl]methoxy]oxane-2-carboxylate