methyl 2,3-di-O-benzyl-α-D-galactopyranoside 、
methyl 4,7,8,9-tetra-O-acetyl-3,5-dideoxy-5-trifluoroacetamido-2-(4-pentenoyl)-β-D-glycero-α-D-galacto-non-2-ulopyranosonate 在
苯基硒基三氟甲烷磺酸酯 作用下,
以
乙腈 为溶剂,
反应 8.5h,
以88%的产率得到(1S,2R)-1-((2R,3R,4S,6R)-4-acetoxy-6-(((2R,3S,4S,5R,6S)-4,5-bis(benzyloxy)-3-hydroxy-6-methoxytetrahydro-2H-pyran-2-yl)methoxy)-6-(methoxycarbonyl)-3-(2,2,2-trifluoroacetamido)tetrahydro-2H-pyran-2-yl)propane-1,2,3-triyl triacetate