2-((S)-1-Azidomethyl-2-phenyl-ethylcarbamoyl)-5-{(S)-3-[3-((S)-1-benzyl-prop-2-ynyl)-ureido]-4-triisopropylsilanyloxy-butyl}-furan-3,4-dicarboxylic acid dimethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
copper(l) iodide   、                                                                                                  
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以58%的产率得到(3S,12S,16S)-3,16-Dibenzyl-5,14-dioxo-12-triisopropylsilanyloxymethyl-21-oxa-1,4,13,15,18,19-hexaaza-tricyclo[15.2.1.1
6,9]henicosa-6,8,17(20),18-tetraene-7,8-dicarboxylic acid dimethyl ester