[(1R,4aS,12aS)-3-((E)-3-Dimethylamino-but-2-enoyl)-2,4a,6,7-tetrahydroxy-8,11-dimethyl-4,5-dioxo-1,4,4a,5,12,12a-hexahydro-naphthacen-1-yl]-carbamic acid benzyl ester 在
sodium carbonate 作用下,
以
四氢呋喃 为溶剂,
生成 [(1R,4aS,12aS)-2,4a,6,7-Tetrahydroxy-3-((Z)-3-hydroxy-but-2-enoyl)-8,11-dimethyl-4,5-dioxo-1,4,4a,5,12,12a-hexahydro-naphthacen-1-yl]-carbamic acid benzyl ester