甲基戊酰氯 、
3-(4-methanesulfonyl-phenyl)-1-[6-methyl-2-(3-nitrophenylamino)-pyridin-3-yl]-propan-1-one 在
potassium carbonate 、
ethyl acetate n-hexane 、
3-benzyl-7-methyl-1-(3-nitrophenyl)-4-oxo-1,4-dihydro[1,8]-naphthyridine-2-carboxylic acid methyl ester 作用下,
以
四氢呋喃 为溶剂,
反应 1.25h,
以to provide 3-benzyl-7-methyl-1-(3-nitrophenyl)-4-oxo-1,4-dihydro[1,8]-naphthyridine-2-carboxylic acid methyl ester (Compound 104, ˜20 mg)的产率得到3-benzyl-7-methyl-1-(3-nitrophenyl)-4-oxo-1,4-dihydro[1,8]-naphthyridine-2-carboxylic acid methyl ester