ethyl 4-[7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]-2-hydroxybutanoate 、
碘甲烷 在
氧化银(II) silica gel 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
以to obtain ethyl 4-[7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]-2-methoxybutanoate (18 mg)的产率得到ethyl 4-[7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-2,4-dioxo-1,4-dihydroquinazolin-3(2H)-yl]-2-methoxybutanoate