2-Fluoro-4-iodoaniline → 4-(2-Fluoro-4-iodophenylamino)-1,5-dimethyl-6-oxo-1,6-dihydropyridazine-3-carboxylic acid

Participants

Reaction Steps

To a suspension of 4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridazine-3-carboxylic acid (200 mg, 0.99 mmol) and 2-fluoro-4-iodoaniline (478 mg, 1.97 mmol) in THF (6.5 mL) at −78° C. was slowly added a solution of LiHMDS (3.00 mL, 3.00 mmol, 1 M solution in THF). After complete addition, the resulting mixture was slowly warmed to room temperature and stirred for 4 hours. The reaction mixture was quenched with 6 N aqueous HCl (8 mL) at 0° C., warmed to room temperature, and stirred for 1.5 hours. The precipitates were filtered, washed with water and ether, and triturated with ether to afford 158 mg (38%) of the desired product.

Provenance & Evidence