Iodine chloride → 3-Iodo-8-methyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridine

Participants

Reaction Conditions

Reaction Steps

To a solution of 8-methyl-6-(4-trifluoromethyl-phenyl)-imidazo[1,2-a]pyridine (example C.20 step 2) (5.0 g, 18 mmol) in 50 mL of acetic acid was added sodium acetate (1.68 g, 20 mmol) and a solution of iodine monochloride (2M, 10.3 mL, 20.6 mmol)—slightly exothermic. The reaction mixture was stirred at 23° C. for 16 h, then partitioned between 300 mL of water and 300 mL of EtOAc. The organic layer was washed with sat. NaHCO3, water, aq. sodium sulfite, water, then dried over Na2SO4, filtered and concentrated to give the title compound as an off-white solid (6.47 g, 89%). MS (ISP) 403.3 [(M+H)+].

Provenance & Evidence