(S)-2-benzyloxycarbonylamino-succinic acid 1-tert-butyl ester 、 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N-甲基吡咯烷酮 为溶剂,
反应 2.17h,
以289 mg的产率得到N4-{O-(2-acetamido-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-α-D-mannopyranosyl-(1->3)-[O-(2-acetamido-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-α-D-mannopyranosyl-(1->6)]-O-β-D-mannopyranosyl-(1->4)-O-(2-acetamido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl)-(1->4)-(2-acetamido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranosyl)}-N2-benzyloxycarbonyl-L-asparagine tert-butyl ester