(S)-6-(2-(2-(trifluoromethyl)pyrrolidin-1-yl)pyrimidin-5-yl)pyrazin-2-amine 、
(S)-2-(1,3-dimethyl-2,6-dioxo-2,3-dihydro-1H-purin-7(6H)-yl)propanoic acid 、
N,N'-二环己基碳二亚胺 、
吡啶 在
hexanes 、
2-(1,3-dimethyl-2,6-dioxopurin-7-yl)-N-[6-[2-[(2S)-2-(trifluoromethyl)pyrrolidin-1-yl]pyrimidin-5-yl]pyrazin-2-yl]propanamide 作用下,
以
二氯甲烷 为溶剂,
反应 19.08h,
以to give the (S,S)-isomer in 2.58 g (retention time: 2.5 min, de: 98%)的产率得到(S)-2-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl)-N-(6-(2-((S)-2-(trifluoromethyl)pyrrolidin-1-yl)pyrimidin-5-yl)pyrazin-2-yl)propanamide