反应详情

温度

0 °C

50 g (250 mmoles) of 2-methyl-5,6,7,8-tetrahydro-5,5,8,8-tetramethyl naphthalene are dissolved in 200 ml of acetic anhydride. The solution is cooled to 0° C. and there is slowly added a solution of 10.5 ml (250 mmoles) of nitric acid, 20 ml of acetic acid and 20 ml of acetic andydride, while maintaining the temperature between 0 and 5° C. The reaction mixture is then stirred for 1 hour at ambient temperature, poured into ice water and filtered. The resulting solid is washed with water. The solid is dissolved in methylene chloride, washed with water and then with a saturated solution of sodium bicarbonate, dried on MgSO4 and evaporated. 45.8 g (74%) of 2-methyl-3-nitro-5,6,7,8-tetrahydro-5,5,8,8-tetramethyl naphthalene which melts at 143-144° C. are obtained.

1. temperaturewhile maintaining the temperature between 0 and 5° C
2. filtrationfiltered
3. washThe resulting solid is washed with water
4. dissolutionThe solid is dissolved in methylene chloride
5. washwashed with water
6. dry with materialwith a saturated solution of sodium bicarbonate, dried on MgSO4
7. customevaporated