methyl (E,4R,5S)-6-[tert-butyl(dimethyl)silyl]oxy-5-[(2-methylpropan-2-yl)oxycarbonylamino]-4-methylsulfonyloxyhex-2-enoate 、 alkaline earth salt of/the/ methylsulfuric acid 以
四氢呋喃 、
乙醚 为溶剂,
反应 0.5h,
以91%的产率得到(E)-(2R,5R)-5-tert-Butoxycarbonylamino-6-(tert-butyl-dimethyl-silanyloxy)-2-methyl-hex-3-enoic acid methyl ester