反应详情

To 160 ml. of acetic anhydride cooled to -5° in an ice-salt bath is added 34 ml. of 90% nitric acid dropwise so that the temperature does not rise above 0°. To this mixture is added 62.7 g. of ethyl 2-thiophenecarboxylate dropwise so that the temperature remains below -5°. Reaction is stirred for 1 hour and poured onto ice. The product is filtered, dried, and recrystallized from hexane.

1. additionis added 34 ml
2. customdoes not rise above 0°
3. additionTo this mixture is added 62.7 g
4. customremains below -5°
5. customReaction
6. additionpoured onto ice
7. filtrationThe product is filtered
8. customdried
9. customrecrystallized from hexane