甘氨酸酐 、
(2R,3R,4R,5R,6R)-2-(4-bromo-2-methylphenyl)-6-((pivaloyloxy)methyl)tetrahydro-2H-pyran-3,4,5-triyltris(2,2-dimethylpropanoate) 在
copper(l) iodide 、
potassium carbonate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以28%的产率得到[(2R,3R,4R,5R,6R)-3,4,5-tris(2,2-dimethylpropanoyloxy)-6-[2-methyl-4-[4-[3-methyl-4-[(2R,3R,4R,5R,6R)-3,4,5-tris(2,2-dimethylpropanoyloxy)-6-(2,2-dimethylpropanoyloxymethyl)tetrahydropyran-2-yl]phenyl]-2,5-dioxopiperazin-1-yl]phenyl]tetrahydropyran-2-yl]methyl 2,2-dimethylpropanoate