(2S)-3,3-dimethyl-2-{3-[(6-methyl-2-pyridinyl)methyl]-2-oxo-1-imidazolidinyl}butanoic acid hydrochloride 、 benzyl (1S,2S,4S)-4-amino-2-hydroxy-1-[4-(4-methyl-2-pyridinyl)benzyl]-5-phenylpentylcarbamate hydrochloride 在
N,N-二异丙基乙胺 、
3-(二乙氧基邻酰氧基)-1,2,3-苯并三嗪-4-酮 作用下,
以
四氢呋喃 为溶剂,
反应 1.5h,
以68%的产率得到benzyl (1S,2S,4S)-4-[((2S)-3,3-dimethyl-2-{3-[(6-methyl-2-pyridinyl)methyl]-2-oxo-1-imidazolidinyl}butanoyl)amino]-2-hydroxy-1-[4-(4-methyl-2-pyridinyl)benzyl]-5-phenylpentylcarbamate