反应详情

温度

50 °C

To 1.12 g (3.80 mmol) of the 7-acetyl-1-ethyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid in 30 ml of acetic acid was added 0.18 g of potassium bromate and 1.48 ml of 48% hydrobromic acid. The mixture was stirred at 50° C. for 24 hours. The mixture was concentrated to one-half volume and 20 ml of water was added. The solids were filtered to give 1.3 g of the 7-bromoacetyl-1-ethyl-6,8-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid, mp 213°-215° C.

1. concentrationThe mixture was concentrated to one-half volume and 20 ml of water
2. additionwas added
3. filtrationThe solids were filtered