N-(N-benzyloxycarbonyl-L-valyl)-glycine 、
(S)-2-({(3R,5S)-5-[(S)-1-((S)-1-tert-Butoxycarbonyl-ethylcarbamoyl)-2-phenyl-ethylcarbamoyl]-isoxazolidine-3-carbonyl}-amino)-3-phenyl-propionic acid benzyl ester 在
三乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
乙腈 为溶剂,
反应 24.0h,
以0.010 g的产率得到(S)-2-({(3R,5S)-2-[2-((S)-2-Benzyloxycarbonylamino-3-methyl-butyrylamino)-acetyl]-5-[(S)-1-((S)-1-tert-butoxycarbonyl-ethylcarbamoyl)-2-phenyl-ethylcarbamoyl]-isoxazolidine-3-carbonyl}-amino)-3-phenyl-propionic acid benzyl ester