isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-4-trifluoromethyl-2,6-dioxo-1(2H)-pyrimidinyl]-benzoate 、
硫酸二甲酯 以
N,N-二甲基甲酰胺 为溶剂,
以there is obtained isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-3-methyl-4-trifluoromethyl-2,6-dioxo-1(2H)-pyrimidinyl]benzoate, 1H-NMR (CDCl3, 400 MHz) 7.84 ppm (d, 1H), 7.37 ppm (d, 1H), 6.38 ppm (s, 1H), 5.25 ppm (m, 1H), 3.57 ppm (d, 3H), 1,36 ppm (d, 6H)的产率得到2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydro-2H-pyrimidin-1-yl)-benzoic acid isopropyl ester