[Benzyl-(2,2,2-trifluoro-acetyl)-amino]-acetic acid 、
tert-butyl N-{2-oxo-2-[(3,4,6-tri-O-acetyl-2-acetamido-2-deoxy-β-D-glucopyranosyl)amino]ethyl}glycylsarcosinate 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以55%的产率得到tert-butyl N-trifluoroacetyl-N-benzylglycyl-N-{2-oxo-2-[(3,4,6-tri-O-acetyl-2-acetamido-2-deoxy-β-D-glucopyranosyl)amino]ethyl}glycylsarcosinate