Iodine → HCID 118600341, compound

Participants

Reaction Steps

Methyl 6-(2-fluoro-4-methoxyphenyl)-4-(trifluoromethyl)pyridine-3-carboxylate (750 mg, 2.278 mmol), iodine (578 mg, 2.278 mmol), silver sulfate (710 mg, 2.278 mmol) and MeOH (20 mL) were stirred in a 70° C. oil bath and monitored by LCMS. The dark color disappeared and LCMS indicated >50% conversion when reaction time=1 hr. Additional I2 (280 mg, 0.788 mmol) and Ag2SO4 (355 mg, 1.074 mmol) were added and resumed stirring/heating for 30 min. The reaction was cooled and quenched by adding Na2S2O3 (sat.). Volatiles were removed under reduced pressure. The pot residue was worked up with brine, extracted with ethyl acetate, dried over Na2SO4, filtered and evaporated in vacuo. The resulting mixture was purified by flash chromatography (SiO2, Biotage SNAP Cartridge, silica gel, KP-Sil, 100 g cartridge). The column was eluted by an EtOAc/hexanes mixture (0% to 40%). Pure fractions were pooled and evaporated to afford a white solid as the titled compound. LCMS calc.=454.96. found=456.03 (M+H)+. 1H NMR (CDCl3, 600 MHz) δ 9.15 (s, 1H), 8.61 (d, J=9.0 Hz, 1H), 8.11 (s, 1H), 6.68 (d, J=11.0, 1H), 4.00 (s, 3H), 3.96 (s, 3H).

Provenance & Evidence