(S)-9-hydroxy-8-methoxy-12a,13-dihydro-6H-benzo[5,6][1,4]diazepino[1,2-a]indol-6-one 、
tert-butyl 11-(3,5-bis(((methylsulfonyl)oxy)methyl)phenyl)-15,18,21,24-tetraoxo-2,5,8-trioxa-11,16,19,22,25-pentaazaoctacosan-28-oate 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 18.0h,
以21%的产率得到tert-butyl 3-[[2-[[2-[[2-[4-[3,5-bis[[(12aS)-8-methoxy-6-oxo-12a,13-dihydroindolo[2,1-c][1,4]benzodiazepin-9-yl]oxymethyl]-N-[2-[2-(2-methoxyethoxy)ethoxy]ethyl]anilino]butanoylamino]acetyl]amino]acetyl]amino]acetyl]amino]propanoate