8-O-[(1R,2E,4E,6E)-1-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]nona-2,4,6,8-tetraenyl] 1-O-methyl (E)-oct-2-en-6-ynedioate 在
2,6-二叔丁基-4-甲基苯酚 作用下,
以
氯苯 为溶剂,
反应 0.75h,
生成 methyl (1R,5aR,6R,9aR,9bR,11aR)-1-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-3-oxo-4,5,5a,6,7,9a,9b,11a-octahydro-1H-naphtho[2,1-e][2]benzofuran-6-carboxylate 、 methyl (1R,5aR,6R,9aS,9bR,11aR)-1-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-3-oxo-4,5,5a,6,7,9a,9b,11a-octahydro-1H-naphtho[2,1-e][2]benzofuran-6-carboxylate