2-((S)-2-Azidomethyl-pyrrolidine-1-carbonyl)-5-[(S)-3-(3-methyl-3-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83%的产率得到dimethyl (3S,15S)-18-methyl-8,17-dioxo-15-[tri(propan-2-yl)silyloxymethyl]-24-oxa-1,7,16,18,21,22-hexazatetracyclo[18.2.1.19,12.03,7]tetracosa-9,11,20(23),21-tetraene-10,11-dicarboxylate