1-(叔丁氧基羰基)-2-吲哚啉羧酸 、 3-((S)-2-Amino-4-methyl-pentanoylamino)-5,5-difluoro-2-hydroxy-pentanoic acid methyl ester 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 36.0h,
以53%的产率得到2-{(S)-1-[3,3-Difluoro-1-(hydroxy-methoxycarbonyl-methyl)-propylcarbamoyl]-3-methyl-butylcarbamoyl}-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester