(3S)-dimethyl [4-(4-methoxybenzyloxy)-3-methyl-2-oxobutyl]phosphonate 、
(2R,3R,4S)-5-((S)-4-Benzyl-2-oxo-oxazolidin-3-yl)-3-(tert-butyl-dimethyl-silanyloxy)-2,4-dimethyl-5-oxo-pentanal 在
N,N-二异丙基乙胺 、
lithium chloride 作用下,
以
乙腈 为溶剂,
以64%的产率得到(2S,3R,4S,8S)-1-[(S)-4-benzyl-2-oxo-oxazolidin-3-yl]-3-(tert-butyldimethylsilyloxy)-9-(4-methoxybenzyloxy)-2,4,8-trimethylnon-5-ene-1,7-dione