二甲氧基乙烷 、
N-[(5S,5aS,8aR,9R)-9-(4-hydroxy-3,5-dimethoxyphenyl)-8-oxo-5a,6,8a,9-tetrahydro-5H-[2]benzofuro[6,5-f][1,3]benzodioxol-5-yl]-2,2-difluoro-2-[(2R,3R,4S,5S,6R)-2,3,4,5-tetrahydroxy-6-(hydroxymethyl)oxan-2-yl]acetamide 在
对甲苯磺酸 作用下,
以
硝基甲烷 为溶剂,
反应 3.0h,
以95%的产率得到2,2-difluoro-N-((5S,5aS,8aR,9R)-9-(4-hydroxy-3,5-dimethoxyphenyl)-8-oxo-5,5a,6,8,8a,9-hexahydrofuro[3',4':6,7]naphtho[2,3-d][1,3]dioxol-5-yl)-2-((4aR,6R,7R,8R,8aS)-6,7,8-trihydroxy-2-methylhexahydropyrano[3,2-d][1,3]dioxin-6-yl)acetamide