tert-butyl N2-[(9H-fluoren-9-ylmethoxy)carbonyl]-N-prop-2-yn-1-yl-L-asparaginate 、
2-azidoethyl 2,3,4,6-tetra-O-acetyl-α-D-mannopyranoside 在
(EtO)3PCuI 、
N,N-二异丙基乙胺 作用下,
以
甲苯 为溶剂,
反应 0.5h,
以95%的产率得到tert-butyl (3S)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxo-4-[[1-[2-[(2S,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxyethyl]triazol-4-yl]methylamino]butanoate