反应详情

温度

40 °C

At 30 C, 3,3-dimethylpent-4-enal (126 g, 0.34 mol) was added over 20 minutes to an ambient temperature, saturated solution of ammonia in methanol (2.7 L). After stirring at 40° C. for 30 minutes, toluenesulfonylmethyl isocyanide (67 g, 0.4 mol) was added. After stirring at reflux overnight, the reaction mixture was concentrated, dissolved in ether and poured into 2N ammonium hydroxide (1500 mL) and stirred. The aqueous phase was extracted with ether. The combined organic extracts were washed with brine, dried (magnesium sulfate), filtered, and concentrated in vacuo to afford 4-(2,2-dimethylbut-3-en-1-yl)-1H-imidazole which was used in the subsequent step without further purification.

1. stirringAfter stirring
2. temperatureat reflux overnight
3. concentrationthe reaction mixture was concentrated
4. dissolutiondissolved in ether
5. additionpoured into 2N ammonium hydroxide (1500 mL)
6. stirringstirred
7. extractionThe aqueous phase was extracted with ether
8. washThe combined organic extracts were washed with brine
9. dry with materialdried (magnesium sulfate)
10. filtrationfiltered
11. concentrationconcentrated in vacuo