反应详情

Methyl 2-hydroxy-3-methylbenzoate (0.869 g, 5.23 mmol) in MeOH (5 mL) was added dropwise to a suspension of iodine (1.327 g, 5.23 mmol) and silver sulfate (1.63 g, 5.23 mmol), at room temperature under N2. The resultant brown suspension was stirred for 3 h after which time a colorless suspension was observed. The mixture was filtered through a plug of Celite, washed with MeOH (30 mL) and concentrated in vacuo to afford methyl 2-hydroxy-5-iodo-3-methylbenzoate, as a colorless solid. LCMS calc.=292.1; found=292.7 (M+H)+. 1H NMR (500 MHz, CHCl3): δ 11.0 (s, 1 H); 8.02 (s, 1 H); 7.62 (s, 1 H); 3.97 (s, 3 H); 2.25 (s, 3 H).

1. filtrationThe mixture was filtered through a plug of Celite
2. washwashed with MeOH (30 mL)
3. concentrationconcentrated in vacuo