氨基甲酸叔丁酯 、
{1-[4-(8-methylamino-7-nitro-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester 在
1-[4-(7,8-diamino-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl 作用下,
以to give the title compound as a yellow oil (95 mg, 89%)的产率得到{1-[4-(7-amino-8-methylamino-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester