(3R,4S)-4-azido-5-hydroxypent-1-en-3-yl pivalate 、
2,3,4,6-tetra-O-benzoyl-1-O-trichloroacetimidoyl-α-D-galactopyranose 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
以71%的产率得到(2R,3R,4S,5S,6R)-2-(((2S,3R)-2-azido-3-(pivaloyloxy)pent-4-en-1-yl)oxy)-6-((benzoyloxy)methyl)tetrahydro-2H-pyran-3,4,5-triyl tribenzoate