反应详情

To a yellow solution of 5-benzylpyridin-2-ol (1.10 g, 5.94 mmol) in 22 mL AcOH under Ar was added 1.5 mL TFA, followed by N-iodosuccinimide (1.34 g, 5.94 mmol). The red homogeneous solution was allowed to stir overnight, poured onto ice and neutralized with conc. NH4OH. The solids were collected by filtration, rinsed with water, treated with MeOH/DCM, dried over sodium sulfate, and evaporated. The resulting brown solid was purified by silica gel chromatography (ISCO, 80 g, 0-70% 90/10 DCM/MeOH in DCM) to give 5-benzyl-3-iodopyridin-2-ol as a yellow/brown solid. MS (ESI) m/z: Calculated: 311.0; Observed: 311.9 (M++1).

1. filtrationThe solids were collected by filtration
2. washrinsed with water
3. additiontreated with MeOH/DCM
4. dry with materialdried over sodium sulfate
5. customevaporated
6. customThe resulting brown solid was purified by silica gel chromatography (ISCO, 80 g, 0-70% 90/10 DCM/MeOH in DCM)