2(S)-[1(S)-((1,1-dimethyl)ethoxycarbonyl)ethyl]-2(S)-hydroxy 4-methyl pentanoic acid 、
L-叔亮氨酸甲酰胺 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以80%的产率得到N-[2(S)-[1(S)-((1,1-dimethyl)ethoxycarbonyl)ethyl]-2(S)-hydroxy-4-methylpentanoyl]-3-methyl-(S)-valine N-methylamide