1-萘乙酸 、
(2R,3R,4S)-4-((S)-2-Amino-3,3-dimethyl-butyrylamino)-2-(4-dimethylamino-benzylamino)-3-hydroxy-5-phenyl-pentanoic acid [(S)-1-(2-hydroxy-4-methoxy-benzylcarbamoyl)-2-methyl-propyl]-amide 在
O-(1,2-dihydro-2-oxo-1-pyridyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基乙酰胺 为溶剂,
生成 (2R,3R,4S)-2-(4-Dimethylamino-benzylamino)-4-[(S)-3,3-dimethyl-2-(2-naphthalen-1-yl-acetylamino)-butyrylamino]-3-hydroxy-5-phenyl-pentanoic acid [(S)-1-(2-hydroxy-4-methoxy-benzylcarbamoyl)-2-methyl-propyl]-amide