(2S,4R)-4-amino-5-(5'-chloro-2'-fluorobiphenyl-4-yl)-2-hydroxymethyl-2-methylpentanoic acid 、
3-乙基异噁唑-5-羧酸 在
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 0.5h,
以3.6 mg的产率得到(2S,4R)-5-(5'-chloro-2'-fluorobiphenyl-4-yl)-4-[(3-ethylisoxazole-5-carbonyl)amino]-2-hydroxymethyl-2-methylpentanoic acid