t-butyl (2S)-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-3-aminopropanoate monohydrochloride   、                                                                                      
(2S)-3-{(2S)-3-[(9-fluorenylmethoxy)carbonylamino]-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)propanoylamino}-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)propanoic acid                                                                                                                                                              在
                                                                                                                                                                                 
N-甲基吗啉   、                                                                                                  
1-羟基苯并三唑一水物   、                                                                                                  
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以63%的产率得到tert-butyl (2S)-3-{(2S)-3-{(2S)-3-[(9-fluorenylmethoxy)carbonylamino]-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)propanoylamino}-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)propanoylamino}-2-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)propanoate