(S)-4'-(2,3-bis(bis(2-tert-butoxy-2-oxoethyl)amino)propanamido)biphenyl-4-carboxylic acid 、
N,N'-diacetylchitobiosamine 在
N,N-二异丙基乙胺 、
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
二氯甲烷 、
二甲基亚砜 为溶剂,
反应 24.0h,
以90%的产率得到tetra(tert-butyl) 2,2',2'',2'''-{{(2S)-3-{{4'-{[2-acetamido-4-O-(2-acetamido-2-deoxy-β-D-glucopyranosyl)-2-deoxy-β-D-glucopyranosyl]carbamoyl}biphenyl-4-yl}amino}-3-oxopropane-1,2-diyl}dinitrilo}tetraacetate