methyl [5-benzyloxy-6-(3-chlorobenzylcarbamoyl)-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridin-3-yl]acetate 在
甲苯 、 ethyl acetate diisopropyl ether 作用下,
以
三氟乙酸 为溶剂,
反应 4.0h,
以gave methyl [2-(3-chlorobenzyl)-9-hydroxy-1,8-dioxo-1,8-dihydro-2H-pyrido[1,2-a]pyrazin-7-yl]acetate (17 mg)的产率得到methyl [2-(3-chlorobenzyl)-9-hydroxy-1,8-dioxo-1,8-dihydro-2H-pyrido[1,2-a]pyrazin-7-yl]acetate