7-(4-fluoro-2-methylaminomethyl-benzyl)-4-hydroxy-1-methyl-2-oxo-1,2-dihydro-[1,5]naphthyridine-3-carboxylic acid ethyl ester 、
乙酸酐 以
1,1-二氯乙烷 为溶剂,
反应 1.0h,
以99%的产率得到7-{2-[(acetyl-methyl-amino)-methyl]-4-fluoro-benzyl}-4-methoxy-1-methyl-2-oxo-1,2-dihydro-[1,5]naphthyridine-3-carboxylic acid ethyl ester