(R)-6-(1-(tert-Butoxycarbonyl)piperidin-3-ylamino)-2-(6-fluoroimidazo[1,2-a]pyridin-3-yl)pyrimidine-4-carboxylic acid 、
三氟乙酸 、 以167 mg (87%) of the title compound were obtained的产率得到(R)-2-(6-fluoroimidazo[1,2-a]pyridin-3-yl)-6-(piperidin-3-ylamino)pyrimidine-4-carboxylic acid