反应详情

3 g (19.08 mmol) of 2,6-dimethylquinoline is introduced into 15 ml of concentrated sulfuric acid at 10° C. After one-half hour, a solution of 2.03 g of potassium nitrate in 11.4 concentrated sulfuric acid is added in drops, specifically so that the temperature remains between 5° and 15° C. The batch is stirred for one more hour and then poured onto ice water. It is made ammonia-alkaline, and the deposited precipitate is suctioned off. After washing with water, the crude product is dissolved in ethyl acetate and shaken from water. The organic phase is treated as usual. After the solvent is spun off, 3.69 g (95.6%) of the desired compound remains, which is used in the reduction without further purification.

1. waitAfter one-half hour
2. customremains between 5° and 15° C
3. additionpoured onto ice water
4. washAfter washing with water
5. dissolutionthe crude product is dissolved in ethyl acetate
6. stirringshaken from water
7. additionThe organic phase is treated as usual
8. customwhich is used in the reduction without further purification