ethyl 3,4,6-tri-O-acetyl-2-deoxy-1-thio-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranoside   、                                                                                      
N-[(9H-fluoren-9-yl)-methoxycarbonyl]-O-[O-(2'',3'',4'',6''-tetra-O-acetyl-β-D-galactopyranosyl)-(1''-3)-(2-azido-2-deoxy-α-D-galactopyranosyl)]-L-threonine tert-butyl ester                                                                                                                                                              在
                                                                                                                                                                                 
N-碘代丁二酰亚胺   、                                                                                                  
三氟甲磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以51%的产率得到tert-butyl (2S,3R)-3-[(2S,3R,4R,5R,6R)-3-azido-6-[[(2R,3R,4R,5S,6R)-4,5-diacetyloxy-6-(acetyloxymethyl)-3-(2,2,2-trichloroethoxycarbonylamino)oxan-2-yl]oxymethyl]-5-hydroxy-4-[(2R,3R,4S,5S,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)butanoate