(R)-1-[1-(2,5-difluorobenzyl)-3-methyl-2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-7-yl]piperidin-3-yl carbamic acid 、 、
三氟乙酸 以to afford 161 mg titled product with a yield of 77.4%的产率得到(R)-1-(2,5-difluorobenzyl)-7-(3-aminopiperidin-1-yl)-3-methyl-1H-imidazo[4,5-b]pyridine-2(3H)-one trifluoroacetate