dimethyl 2-(3-(tert-butoxycarbonyl)-5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)cyclopropane-1,1-dicarboxylate 在
indium(III) triflate 作用下,
以
乙醇 、
二氯甲烷 为溶剂,
反应 20.0h,
生成 dimethyl 5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2-phenyldihydrofuran-3,3(2H)-dicarboxylate