benzyl 4-(2-oxo-8-quinolin-3-yl-2,3-dihydro-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)piperidine-1-carboxylate 、
sodium;hydride 、
碘甲烷 在
甲醇 、
benzyl 4-(3-methyl-2-oxo-8-quinolin-3-yl-2,3-dihydro-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)piperidine-1-carboxylate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 4.0h,
以to afford benzyl 4-(3-methyl-2-oxo-8-quinolin-3-yl-2,3-dihydro-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)piperidine-1-carboxylate (compound 49) (5.0 g, 73%)的产率得到benzyl 4-(3-methyl-2-oxo-8-quinolin-3-yl-2,3-dihydro-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)piperidine-1-carboxylate