5,6,7,8-tetrahydro-5,8-ethano-1,4-naphthoquinone 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 12.0h,
以76%的产率得到20,29,38,52-Tetraoxaheptadecacyclo[39.2.2.214,17.223,26.232,35.13,12.02,40.04,11.05,39.06,37.07,30.08,28.09,21.010,19.013,18.022,27.031,36]dopentaconta-2,4,6,8,10,12,18,21,27,30,36,39-dodecaene