N-[6-(2-methyl-imidazol-1-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamide 、
氯甲酸乙酯 在
crude product 、 silica gel 、
ethyl acetate n-hexane 、
乙酸乙酯 作用下,
以
吡啶 为溶剂,
反应 1.0h,
以to yield methanesulfonyl-[6-(2-methyl-imidazol-1-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-carbamic acid ethyl ester (34 mg, 0.070 mmol, 47% yield) as white resin的产率得到methanesulfonyl-[6-(2-methyl-imidazol-1-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-carbamic acid ethyl ester