dexamethasone 21-(p-nitrophenyl carbonate) 、 (2S)-N-[(2S)-1-(6-aminohexylamino)-1-oxo-6-[3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]sulfanylpropanoylamino]hexan-2-yl]-2,6-bis[3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]sulfanylpropanoylamino]hexanamide 以
N,N-二甲基甲酰胺 为溶剂,
反应 0.5h,
以73%的产率得到N
α-
α,Nε-bis<3-(α-D-mannopyranosylthio)propionyl>-L-lysyl>-N-<6-(carboxyamino)hexyl>-Nε-<3-(α-D-mannopyranosylthio)propionyl>-L-lysinamide, dexamethasone 21-ester