2-((S)-1-Azidomethyl-2-phenyl-ethylcarbamoyl)-5-{(R)-3-[3-((R)-2-phenyl-1-prop-2-ynylcarbamoyl-ethyl)-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,12R,16R)-3,16-Dibenzyl-5,14,17-trioxo-12-triisopropylsilanyloxymethyl-24-oxa-1,4,13,15,18,21,22-heptaaza-tricyclo[18.2.1.1
6,9]tetracosa-6,8,20(23),21-tetraene-7,8-dicarboxylic acid dimethyl ester