8-triisopropylsilanyloxy-9-methoxy-3-[1,3]dioxolane-2,3,5a,10c-tetrahydro-1H,6H-5-oxa-acephenanthrylene-10b-carbonitrile 在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
以84%的产率得到8-hydroxy-9-methoxy-3-[1,3]dioxolane-2,3,5a,10c-tetrahydro-1H,6H-5-oxa-3-oxo-acephenanthrylene-10b-carbonitrile ethylene ketal