反应详情

温度

5 °C

4-Chloro-3,5-dimethyl-phenol (20.0 g, 128 mmol) was dissolved in glacial acid (150 ml) and the solution was cooled to 5° C. Then nitric acid 65% (12.4 g, 128 mmol) was added dropwise while temperature was kept below 20° C. by external cooling. After the addition was complete stirring was continued for 1 hour at ambient temperature. The reaction mixture was poured into ice/water (1:1, 500 g) whereupon an orange solid precipitated. The solid was filtered off, washed with water and dried. Yield: 23.2 g (90.1%). 1H-NMR (DMSO-d6): δ=11.0 (s, 1H); 6.9 (s, 1H); 2.3 (s, 3H); 2.2 ppm (s, 3H).

1. customwas kept below 20° C. by external cooling
2. additionAfter the addition
3. customprecipitated
4. filtrationThe solid was filtered off
5. washwashed with water
6. customdried