(S)-N1-(4-trifluoromethoxy-phenyl)-propane-1,2-diamine 、 (R)-4,4-Dimethyl-2-(2-morpholin-4-yl-2-oxo-ethyl)-pentanoic acid 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,
生成
4,4-dimethyl-2-(R)-(2-morpholin-4-yl-2-oxo-ethyl)-pentanoic acid [1-(S)-methyl-2-(4-trifluoromethoxy-phenylamino)-ethyl]-amide