(R)-2-({2-[2-(7-Dimethylamino-2-oxo-2H-chromen-4-yl)-acetylamino]-acetyl}-methyl-amino)-4-methyl-pentanoic acid methyl ester 在
N-甲基吗啉 、 lithium hydroxide 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
生成 (2R)-N-[(3S,6S,8S,12S,13R,16S,17R,20S,23S)-13-[(2S)-butan-2-yl]-12-hydroxy-20-[(4-methoxyphenyl)methyl]-6,17,21-trimethyl-3-(2-methylpropyl)-2,5,7,10,15,19,22-heptaoxo-8-propan-2-yl-9,18-dioxa-1,4,14,21-tetrazabicyclo[21.3.0]hexacosan-16-yl]-2-[[2-[[2-[7-(dimethylamino)-2-oxochromen-4-yl]acetyl]amino]acetyl]-methylamino]-4-methylpentanamide