7-methoxy-8-{3-[(2S)-N-(4-benzyloxy-5-methoxy-2-aminobenzoyl)pyrrolidine-2-carboxaldehyde diethyl thioacetal-4-(carboxamidomethylidene)-propyl]oxy}-(11aS)-1,2,3,10,11,11a-hexahydro-5H-pyrrolo[2,1-c][1,4]-benzodiazepin-5,11-dione 在
calcium carbonate 、 mercury dichloride 作用下,
以
水 、
乙腈 为溶剂,
以53%的产率得到2-[(S)-8-Benzyloxy-7-methoxy-5-oxo-5,11a-dihydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-(2E)-ylidene]-N-[3-((S)-7-methoxy-5,11-dioxo-2,3,5,10,11,11a-hexahydro-1H-benzo[e]pyrrolo[1,2-a][1,4]diazepin-8-yloxy)-propyl]-acetamide