异丁烯基三甲基硅烷 、
ethyl (1R,3S,3aR,7R,7aR)-7-isopropyl-4-methylene-3-((4-nitrobenzyl)oxy)octahydroisobenzofuran-1-carboxylate 、
ethyl (1R,3R,3aR,7R,7aR)-7-isopropyl-4-methylene-3-((4-nitrobenzyl)oxy)octahydroisobenzofuran-1-carboxylate 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙腈 为溶剂,
以60%的产率得到ethyl (1R,3R,3aR,7R,7aR)-4-methylidene-3-(2-methylprop-2-enyl)-7-propan-2-yl-3,3a,5,6,7,7a-hexahydro-1H-2-benzofuran-1-carboxylate