Pyridine → 4-Bromo-2,6-difluoroaniline

Participants

Reaction Steps

252 g (1.95 mol) of 2,6-difluoroaniline and 170 g (2.15 mol) of anhydrous pyridine were dissolved in 780 cm3 of chloroform, and a solution of 328 g (2.05 mol) of bromine dissolved in 390 cm3 of chloroform was added dropwise for 2 hours on an ice water bath while stirring, after which it was stirred for 2 hours at room temperature. After washing the reaction solution with water, the chloroform was removed, the residue was distilled under reduced pressure (b. p. 100° C./30 mmHg), and the crystals obtained were recrystallized from hexane to obtain 340 g (1.63 mol) of 4-bromo-2,6-difluoroaniline.

Provenance & Evidence