(2S,3R,4S)-4-[((2S,3R,4S)-4-Azido-3-hydroxy-tetrahydro-furan-2-carbonyl)-amino]-3-hydroxy-tetrahydro-furan-2-carboxylic acid 在
吡啶 、 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 25.0h,
生成 isopropyl 2,5-anhydro-4-N-(2,5-anhydro-4-N-(2,5-anhydro-4-N-(2,5-anhydro-4-azido-4-deoxy-3-O-triethylsilyl-L-xylonamido)-4-deoxy-3-O-triethylsilyl-L-xylonamido)-4-deoxy-3-O-triethylsilyl-L-xylonamido)-4-deoxy-3-O-triethylsilyl-L-xylonate