(5-amino-2-pyridyl) 2,3,4,6-tetra-O-acetyl-1-thio-β-D-glucopyranoside 、
succinic acid mono-3-N-benzoyl-2',3'-O-isopropylidene-uridin-5'-yl ester 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
吡啶 为溶剂,
反应 17.0h,
以23%的产率得到[(3aR,4R,6R,6aR)-4-(2,4-dioxopyrimidin-1-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]methyl 4-oxo-4-[[6-[(2S,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]sulfanylpyridin-3-yl]amino]butanoate