反应详情

A solution of 4-amino-2-methyl-phenol (4.25 g, 34.5 mmol) in dimethylacetamide (50 mL) was degassed in vacuo and blanketed with argon. Potassium tert-butoxide (5.0 g, 44.6 mmol) was added and the reaction mixture was de-gassed a second time and stirred at RT under argon for 30 min. 2,4-Dichloro-pyridine (4.6 g, 31.3 mmol) was added and the mixture was heated to 100° C. overnight. The solvent was removed under reduced pressure and the residue was purified by silica gel chromatography to give 4-(2-chloropyridin-4-yloxy)-3-methylbenzenamine (4.5 g, 56% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.21 (d, J=5.2 Hz, 1H), 6.75-6.80 (m, 3H), 6.45-6.50 (m, 2H), 5.15 (s, 2H), 1.92 (s, 3H); MS (ESI) m/z: 235.1 (M+H+).

1. customthe reaction mixture was de-gassed a second time
2. temperaturethe mixture was heated to 100° C. overnight
3. customThe solvent was removed under reduced pressure
4. customthe residue was purified by silica gel chromatography