(6S,9S)-N-benzyl-6-(4-hydroxybenzyl)-2,9-dimethyl-4,7-dioxo-8-(quinolin-8-ylmethyl)octahydro-1H-pyrazino[2,1-c][1,2,4]triazine-1-carboxamide 、
Benzyl 2-isocyanato-4-methylpentanoate 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以58.8%的产率得到benzyl 2-((4-(((6S,9S)-1-(benzylcarbamoyl)-2,9-dimethyl-4,7-dioxo-8-(quinolin-8-ylmethyl)octahydro-1H-pyrazino[2,1-c][1,2,4]triazin-6-yl)methyl)phenoxy)carbonylamino)-4-methylpentanoate