tert-butyl 4-((4-(5-bromopyrazin-2-yl)piperidin-1-yl)sulfonyl)tetrahydro-2H-pyran-4-carboxylate 、
2,2,3,3,3-五氟-1-丙醇 在
18-冠醚-6 potassium carbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以89%的产率得到tert-butyl 4-((4-(5-(2,2,3,3,3-pentafluoropropoxy)pyrazin-2-yl)piperidin-1-yl)sulfonyl)tetrahydro-2H-pyran-4-carboxylate