{(S)-5-((R)-2-Azido-4-methyl-pentanoylamino)-5-[(2,4-dimethoxy-benzyl)-prop-2-ynyl-carbamoyl]-pentyl}-carbamic acid tert-butyl ester 在
2,6-二甲基吡啶 、
copper(l) iodide 、
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以70%的产率得到tert-butyl N-[4-[(2R,5S,13R,16S)-7,18-bis[(2,4-dimethoxyphenyl)methyl]-16-[4-[(2-methylpropan-2-yl)oxycarbonylamino]butyl]-2,13-bis(2-methylpropyl)-3,6,14,17-tetraoxo-1,4,7,10,11,12,15,18,21,22-decazatricyclo[18.2.1.19,12]tetracosa-9(24),10,20(23),21-tetraen-5-yl]butyl]carbamate