(S)-3-(5'-{(S)-2-Allyloxycarbonylamino-2-[(S)-2-(4-fluoro-3-nitro-phenyl)-1-methylcarbamoyl-ethylcarbamoyl]-ethyl}-2',3'-dihydroxy-6-methoxy-biphenyl-3-yl)-2-tert-butoxycarbonylamino-propionic acid methyl ester 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (S)-3-[3-((9S,12S)-9-Allyloxycarbonylamino-4-methoxy-12-methylcarbamoyl-16-nitro-10-oxo-2-oxa-11-aza-tricyclo[12.2.2.1
3,7]nonadeca-1(17),3(19),4,6,14(18),15-hexaen-5-yl)-4-methoxy-phenyl]-2-tert-butoxycarbonylamino-propionic acid methyl ester