(2S)-N-{4-[N-(9,10-dihydro-9,10-dioxo-1-anthracenyl)-propane-3-carboxamide]-oxy-5-methoxy-2-aminobenzoyl}pyrrolidine-2-carboxaldehyde diethyl dithioacetal 在
calcium carbonate 、 mercury dichloride 作用下,
以
水 、
乙腈 为溶剂,
生成 7-methoxy-8-[N-(9,10-dihydro-9,10-dioxo-1-anthracenyl)-propane-3-carboxamide]-oxy-(11a S)-1,2,3,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepine-5-one