Chlorotrimethylsilane → 2-Fluoro-4-(trimethylsilyl)aniline

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-bromo-2-fluoro-phenylamine (114 g, 0.6 mol) in anhydrous THF (750 mL) under inert atmosphere at −78° C. was added a 1.6M solution of nBuLi in hexanes (1500 mL, 2.4 mol) dropwise keeping the internal temperature below −60° C. The reaction mixture was treated dropwise with TMSCl (256 mL, 2.0 mol), keeping the internal temperature below −60° C. The reaction mixture was allowed to warm to 0° C. over a 1 hour period and poured into ice-cold 2M HCl (ca 1 L). The mixture was vigorously stirred for 10 min, then the organic layer was separated, washed with water followed by a saturated solution of potassium carbonate, dried (Na2SO4), filtered and concentrated to give the title compound as a light brown oil (89 g, 81%).

Provenance & Evidence