(3aR,5R)-7-Hydroxy-12-methoxy-8,13-dioxo-3a,4,5,6,8,13-hexahydro-1,3-dioxa-benzo[de]naphthacene-5-carboxylic acid ethyl ester 在
氧气 、
lithium diisopropyl amide 、
亚磷酸三乙酯 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
生成 (S)-5,7-Dihydroxy-12-methoxy-8,13-dioxo-3a,4,5,6,8,13-hexahydro-1,3-dioxa-benzo[de]naphthacene-5-carboxylic acid ethyl ester 、 (3aR,5S)-5,7-Dihydroxy-12-methoxy-8,13-dioxo-3a,4,5,6,8,13-hexahydro-1,3-dioxa-benzo[de]naphthacene-5-carboxylic acid ethyl ester