ethyl 4-oxo-2-((4-[(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)oxymethyl]-1H-1,2,3-triazol-1-yl)methyl)-3,5,6,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine-7(4H)-carboxylate   、                                                                                      
3-溴丙炔                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以64%的产率得到ethyl 4-oxo-3-(2-propynyl)-2-((4-[(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)oxymethyl]-1H-1,2,3-triazol-1-yl)methyl)-3,5,6,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine-7(4H)-carboxylate