(1S,2R,4R)-2-Ethyl-2,5-dihydroxy-4-((1S,2S)-2-hydroxy-1-methyl-propoxy)-7-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacene-1-carboxylic acid 2-trimethylsilanyl-ethyl ester 在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
生成
(8S,trans)-8-ethyl-10-[2'(S)-hydroxy-1'(S)-methylpropyloxy]-7,8,9,10-tetrahydro-8,11-dihydroxy-1-methoxy-5,12-naphthacenedione