5-iodo-1-methylpyridin-2(1H)-one 、
(R)-tert-butyl 2-hydroxy-2-((R)-3-oxo-4-(1H-pyrazol-3-yl)morpholin-2-yl)propanoate 、
5-溴-1-(二氟甲基)吡啶-2(1H)-酮 、
3-氨基吡唑 以to obtain (R)-tert-butyl 2-hydroxy-2-((R)-4-(1-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-1H-pyrazol-3-yl)-3-oxomorpholin-2-yl)propanoate的产率得到(R)-tert-butyl 2-hydroxy-2-((R)-4-(1-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-1H-pyrazol-3-yl)-3-oxomorpholin-2-yl)propanoate