(±)-4-(3-aminopyridin-4-yl)-2-((tert-butoxycarbonyl)amino)-6-methylcyclohexyl acetate 、
6-溴-5-氟-2-吡啶甲酸 在
水 、 NaCl(sat.) 、
magnesium sulfate 作用下,
以
乙酸乙酯 为溶剂,
以(1R,2R,4R,6S)-4-(3-(6-bromo-5-fluoropicolinamido)pyridin-4-yl)-2-(tert-butoxycarbonylamino)-6-methylcyclohexyl acetate was obtained的产率得到(1R,2R,4R,6S)-4-(3-(6-bromo-5-fluoropicolinamido)pyridin-4-yl)-2-(tert-butoxycarbonylamino)-6-methylcyclohexyl acetate