1-methyl-6-trifluoromethyl-3-(6-amino-4-chloro-2-fluoro-5-hydroxy-phenyl)-2,4(1H,3H)-pyrimidinedione 、
1,2-二溴乙烷 、
potassium carbonate 在
silica gel 作用下,
以
丙酮 为溶剂,
反应 6.0h,
以to give the title compounds (0.028 g)的产率得到3-(8-Chloro-6-fluoro-3,4-dihydro-2H-1,4-benzoxazin-5-yl)-1-methyl-6-trifluoromethyl-2,4(1H,3H)-pyrimidindione