N-[6-(4-fluorobenzyl)-4-methoxy-2-oxido-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridin-1-yl]-N-methylmethanesulfonamide 、
乙酸酐 反应 3.0h,
以to give the intermediate 6-(4-fluorobenzyl)-4-methoxy-1-[methyl(methylsulfonyl)amino]-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridin-3-yl acetate (ES MS (M+1)=452)的产率得到6-(4-fluorobenzyl)-4-methoxy-1-[methyl(methylsulfonyl)amino]-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridin-3-yl acetate