(E)-(4S,5S,6R)-5-tert-Butoxycarbonylamino-6-(tert-butyl-dimethyl-silanyloxy)-4-methanesulfonyloxy-hept-2-enoic acid methyl ester 、 alkaline earth salt of/the/ methylsulfuric acid 以
四氢呋喃 、
乙醚 为溶剂,
反应 1.0h,
以94%的产率得到(E)-(2S,5R,6R)-5-tert-Butoxycarbonylamino-6-(tert-butyl-dimethyl-silanyloxy)-2-isobutyl-hept-3-enoic acid methyl ester