3-(4-chloro-2-fluoro-5-isopropoxyphenyl)-5-fluoro-6-methyl-2,4(1H,3H)-pyrimidinedione 、
硫酸二甲酯 以there is obtained 3-(4-chloro-2-fluoro-5-isopropoxyphenyl)-1,6-dimethyl-5-fluoro-2,4(1H,3H)pyrimidinedione, m.p. 139°-141° C.的产率得到3-(4-chloro-2-fluoro-5-isopropoxyphenyl)-1,6-dimethyl-5-fluoro-2,4(1H,3H)pyrimidinedione