2,6-Dibromo-3-chloro-4-fluoroaniline

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2,6-dibromo-3-chloro-4-fluoro-phenylamine (1a, 4.85 g, 16 mmol, 1 eq.) in DMF (20 mL) was added to a solution of isoamylnitrite (3.46 mL, 25.6 mmol, 1.6 eq.) in DMF (12 mL) at 70° C. The mixture was heated at 70° C. for 3 h before it was cooled to room temperature, quenched with 1 N NaOH aqueous solution (150 mL), and extracted with EtOAc (200 mL). The EtOAc extract was washed with brine (100 mL×2), dried over MgSO4, filtered and concentrated. The residue was purified by flash chromatography (heptane) to give desired product 2a as colorless oil (3.70 g, 80%). was cooled to room temperature quenched with 1 N NaOH aqueous solution (150 mL) extracted with EtOAc (200 mL) The EtOAc extract was washed with brine (100 mL×2) dried over MgSO4 filtered concentrated The residue was purified by flash chromatography (heptane)