反应详情

20.0 g (98 mmol) pyridine-2,6-dicarboxylic acid chloride in 250 ml of dry benzene were mixed with 32.4 g (243 mmol) of anhydrous aluminum trichloride under an argon atmosphere in a 500 ml round-bottom flask fitted with a reflux condenser. The batch was stirred for 4 hours under reflux, was then cooled and stirred overnight at room temperature (“RT”), and was then stirred for a further 6 hours under reflux. After cooling, the batch was carefully poured into 500 ml of iced water. The organic phase was separated and the aqueous phase was washed twice with 100 ml diethyl ether each time. The combined organic phases were washed twice with 100 ml water each time and were then dried over sodium sulphate. The solvents were removed in a rotary evaporator and the product was recrystallized from diethyl ether. Yield: 16.80 g.

1. customfitted with a reflux condenser
2. temperatureunder reflux
3. temperaturewas then cooled
4. stirringstirred overnight at room temperature (“RT”)
5. stirringwas then stirred for a further 6 hours
6. temperatureunder reflux
7. temperatureAfter cooling
8. customThe organic phase was separated
9. washthe aqueous phase was washed twice with 100 ml diethyl ether each time
10. washThe combined organic phases were washed twice with 100 ml water each time
11. dry with materialwere then dried over sodium sulphate
12. customThe solvents were removed in a rotary evaporator
13. customthe product was recrystallized from diethyl ether