2-amino-1-[2-(6-fluoro-1H-indole-3-carbonyl)-4-hydroxy-pyrrolidin-1-yl]-3,3-dimethyl-butan-1-one 、
(2S)-2-(methyl{[(phenylmethyl)oxy]carbonyl}amino)propanoic acid 在
N-甲基吗啉 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N-甲基吡咯烷酮 为溶剂,
以35%的产率得到(1-{1-[2-(6-fluoro-1H-indole-3-carbonyl)-4-hydroxy-pyrrolidine-1-carbonyl]-2,2-dimethyl-propylcarbamoyl}-ethyl)-methyl-carbamic acid benzyl ester