[(2S,3S,4R)-2-[(S)-[tert-butyl(dimethyl)silyl]oxy-[2-[tert-butyl(dimethyl)silyl]oxyfuran-3-yl]methyl]-3-phenylmethoxy-6-(2-trimethylsilylethynyl)-3,4-dihydro-2H-pyran-4-yl] acetate 在
2,4,6-三甲基吡啶 、
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 0.33h,
以83%的产率得到(1R,4S,5S,6S,7S)-6-[tert-butyl(dimethyl)silyl]oxy-4-phenylmethoxy-1-(2-trimethylsilylethynyl)spiro[8-oxabicyclo[3.2.1]oct-2-ene-7,3'-furan]-2'-one