The bromination of 6 methoxy 2 propionylnaphthalene with 1,3 dibromo 5,5 dimethylhydantoin proceeded smoothly, quickly, and gave 5 bromo 6 methoxy 2 propionylnaphthalene with 98.59% yield in alcohol.

• 室温下；6-甲氧基-2-丙酰基萘和1；3-二溴-5；5-二甲基海因的溴化反应在醇溶剂中；反应速度快、转化率高；生成5-溴-6-甲氧基-2-丙酰基萘的收率高(98.；59