diisopropyl (E)-2-{2,6-dihydroxy-5-[3-isopropoxy-1-(isopropoxycarbonyl)-3-oxo-(1,1,1-triphenyl-λ5-phosphanylidene)propyl]-9,10-dioxo-9,10-dihydro-2-anthracenyl}-2-butenedioate                                                                                                                                                                                                                                                                      反应 2.0h,
                                                                                                                以59%的产率得到diisopropyl (E)-2-{2,8-dihydroxy-1-[2-isopropoxy-2-oxo-1-(1,1,1-triphenyl-λ5-phosphanylidene)ethyl]-6,11-dioxo-6,11-dihydroanthra[2,1-b]furan-7-yl}-2-butenedioate