Sodium Hydroxide → 4-Bromo-3-(3,4-difluoro-benzenesulfonyl)-7-nitro-quinoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-(3,4-difluoro-benzenesulfonyl)-7-nitro-quinolin-4-ol (1.6 g, 4.37 mmol) and phosphorus(V) oxybromide (2.5 g, 8.72 mmol) in DMF (16 ml) was stirred at 65° C. for 1 hour. The reaction mixture was diluted with water (100 ml) and the pH was adjusted to 10 with aqueous sodium hydroxide solution. After cooling the precipitate was filtered and washed with water. The obtained crude product was purified by crystallization from ethanol to obtain 1.25 g of the title compound in 67% yield.

Provenance & Evidence