(S)-9-((5-iodopentyl)oxy)-8-methoxy-12a,13-dihydro-6H-benzo[5,6][1,4]diazepino[1,2-a]indol-6-one 、
methyl 4-[(12aS)-9-hydroxy-8-methoxy-6-oxo-12a,13-dihydro-12H-indolo[2,1-c][1,4]benzodiazepin-11-yl]-4-oxobutanoate 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以66%的产率得到methyl 4-[(12aS)-9-[5-[[(12aS)-8-methoxy-6-oxo-12a,13-dihydroindolo[2,1-c][1,4]benzodiazepin-9-yl]oxy]pentoxy]-8-methoxy-6-oxo-12a,13-dihydro-12H-indolo[2,1-c][1,4]benzodiazepin-11-yl]-4-oxobutanoate