cesium salt of 2,2-dimethyl-3-hydroxypropionic acid 、
cesium iodide 、
chloromethyl (4S,5S)-5-((2S)-2-{[(3-amino-2,2-dimethyl-3-oxopropyl)amino]carbonyl}-3-methylbutyl)-4-{(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl}-1,3-oxazolidine-3-carboxylate 以to give 20 mg of desired product as an oil的产率得到[(3-hydroxy-2,2-dimethylpropanoyl)oxy]methyl (4S,5S)-5-((2S)-2-{[(3-amino-2,2-dimethyl-3-oxopropyl)amino]carbonyl}-3-methylbutyl)-4-{(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl}-1,3-oxazolidine-3-carboxylate