(4R)-3-[4-[(2S,4R,6S)-4-methoxy-6-methyloxan-2-yl]butanoyl]-4-propan-2-yl-1,3-oxazolidin-2-one 、
(2R,3S,4S)-3-[tert-butyl(dimethyl)silyl]oxy-4-[(4R,6S)-6-[(2R,3S,5S)-3-methoxy-5-[(4-methoxyphenyl)methoxy]-7-phenylmethoxyheptan-2-yl]-2,2-dimethyl-1,3-dioxan-4-yl]-2-methylpentanal 在
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
以70%的产率得到(4R)-3-[(2S,3R,4S,5R,6S)-5-[tert-butyl(dimethyl)silyl]oxy-3-hydroxy-6-[(4R,6S)-6-[(2R,3S,5S)-3-methoxy-5-[(4-methoxyphenyl)methoxy]-7-phenylmethoxyheptan-2-yl]-2,2-dimethyl-1,3-dioxan-4-yl]-2-[2-[(2S,4R,6S)-4-methoxy-6-methyloxan-2-yl]ethyl]-4-methylheptanoyl]-4-propan-2-yl-1,3-oxazolidin-2-one