tert-butyl ((3aR,5S,6R,7R,7aR)-6-(benzyloxy)-7-fluoro-5-((R)-1,1,1-trifluoro-2-hydroxypropan-2-yl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazol-2-yl)(methyl)carbamate 、
三氯化硼 在
silica gel 、
氨 、
methanol-dichloromethane 作用下,
以(3aR,5S,6R,7R,7aR)-7-fluoro-2-(methylamino)-5-((R)-1,1,1-trifluoro-2-hydroxypropan-2-yl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazol-6-ol was obtained as a white solid (0.114 g, 91%)的产率得到(3aR,5S,6R,7R,7aR)-7-fluoro-2-(methylamino)-5-((R)-1,1,1-trifluoro-2-hydroxypropan-2-yl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazol-6-ol