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)(ethyl)carbamate   、                                                                                      
三氯化硼                                                                                                                                                              在
                                                                                                                                                                                 silica gel   、                                                                                                  
氨   、                                                                                                  
methanol-dichloromethane                                                                                                                                  作用下,
                                                                                                                                                                                                                            以(3aR,5S,6R,7R,7aR)-2-(ethylamino)-7-fluoro-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 (0.053 g, 84%)的产率得到(3aR,5S,6R,7R,7aR)-2-(ethylamino)-7-fluoro-5-((R)-1,1,1-trifluoro-2-hydroxypropan-2-yl)-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]thiazol-6-ol