3-O-Acetyl-2-O-(3,4,6-tri-O-acetyl-2-N-allyloxycarbonylamino-2-deoxy-β-D-glucopyranosyl)-1,6-anhydro-β-D-mannopyranose   、                                                                                      1,3,4,6-tetra-O-acetyl-2-deoxy-2-(allyloxycarbonylamino)-β-D-glucopyranose                                                                                                                                                              在
                                                                                                                                                                                 
三氟甲磺酸三甲基硅酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以68%的产率得到3-O-Acetyl-2,4-di-O-(3,4,6-tri-O-acetyl-2-N-allyloxycarbonylamino-2-deoxy-β-D-glucopyranosyl)-1,6-anhydro-β-D-mannopyranose