N-Boc 4-azidophenylalanine ethyl ester 、
2,2,5,5-tetramethyl-3-pyrroline-1-oxyl-3-acetylene 在
copper(l) iodide 作用下,
以
二甲基亚砜 为溶剂,
以64%的产率得到ethyl 2-tert-butoxycarbonylamino-3-{4-[4-(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)-1H-[1,2,3]triazol-1-yl]phenyl}propionate radical