dimethyl (E)-2-{2,6-dihydroxy-5-[3-methoxy-1-(methoxycarbonyl)-3-oxo-(1,1,1-triphenyl-λ5-phosphanylidene)propyl]-9,10-dioxo-9,10-dihydro-2-anthracenyl}-2-butenedioate 反应 2.0h,
以65%的产率得到dimethyl (E)-2-{2,8-dihydroxy-1-[2-methoxy-2-oxo-1-(1,1,1-triphenyl-λ5-phosphanylidene)ethyl]-6,11-dioxo-6,11-dihydroanthra[2,1-b]furan-7-yl}-2-butenedioate