1-((6aR*,12aR*)-2,4,9-trihydroxy-1,3,6a,8,10-pentamethyl-6a,12a-dihydro-5H,12H-isochromeno[3,4-b]chromen-11-yl)propan-2-one 在
三氟化硼乙醚 作用下,
以
乙腈 为溶剂,
反应 0.5h,
以66%的产率得到(7R*,12aS*)-6,9,11-trihydroxy-2,4,6,8,10-pentamethyl-1-(2-oxopropyl)-7,12-dihydro-3H,6H-7,12a-methanodibenzo[b,e]oxocin-3-one