(10S,23R)-23-amino-10-ethyl-18-fluoro-10-hydroxy-8-oxa-21-thia-4,15-diazahexacyclo[14.7.1.02,14.04,13.06,11.020,24]tetracosa-1,6(11),12,14,16(24),17,19-heptaene-5,9-dione 、
4-((S)-2-((S)-2-(6-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)hexamido)-3-methylbutyrylamino)-5-ureidopentanamido)benzyl (4-nitrophenyl)carbonate 在
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.0h,
以32%的产率得到4-((S)-2-((S)-2-(6-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)hexanoylamino)-3-methylbutyrylamino)-5-ureidopentanamido)benzyl ((1R,9S)-9-ethyl-5-fluoro-9-hydroxy-10,13-dioxo-1,2,9,10,13,15-hexahydro-12H-pyran[3',4':6,7]indolizine[1,2-b]thiopyran[4,3,2-de]quinoline-1-yl)carbamate