蒽 、
Acetic acid 2,5-dioxo-bicyclo[4.2.0]octa-1(6),3-dien-7-yl ester 在
三氟化硼乙醚 作用下,
以
苯 为溶剂,
反应 5.0h,
生成 (9R,10S,11R,13R,14S)-15,18-dioxo-9,10-dihydro-9,10-[4]bicycloanthracen-13-yl acetate 、 (9R,10S,11R,13R,14S)-15,18-dioxo-9,10-dihydro-9,10-[4]bicycloanthracen-13-yl acetate