以94的产率得到tert-butyl (5S)-5-[[(2R,3R,4S,5S)-4-(benzenesulfonylmethyl)-5-[[(2R,4R,6S)-6-[2-[(2S,5S)-5-(3-hydroxypropyl)-3-methylideneoxolan-2-yl]ethyl]-4-methyl-3-methylideneoxan-2-yl]methyl]-3-methoxyoxolan-2-yl]methyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate