تفاعل #2139944

معادلة التفاعل

4-bromo-2-fluoro-1-iodobenzene

1-pentyne

water

ether

→

4-bromo-2-fluoro-1-pent-1-ynylbenzene

المذيبات

THF

triethylamine

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGthe mixture was stirred for a further 5 minutes
2. 2
   ترشيحThe reaction mixture was filtered through Celite® with suction
3. 3
   أخرىthe phases were separated
4. 4
   استخلاصThe aqueous phase was extracted twice with MTB ether
5. 5
   غسيلthe combined organic phases were washed three times with water
6. 6
   تجفيفdried over sodium sulfate
7. 7
   أخرىevaporated under reduced pressure
8. 8
   ترشيحThe crude product was filtered through silica gel with n-heptane

الإجراء التجريبي

190 g (0.600 mol) of 4-bromo-2-fluoro-1-iodobenzene and 65.3 ml of 1-pentyne were dissolved in a mixture of 900 ml of THF and 1.2 l of triethylamine and cooled to 10° C., and 1.14 g (6 mmol) of copper(I) iodide and 8.42 g (12 mmol) of bis(triphenylphosphine)palladium(II) chloride were added. The batch was stirred overnight at room temperature, water and MTB ether were subsequently added, and the mixture was stirred for a further 5 minutes. The reaction mixture was filtered through Celite® with suction, and the phases were separated. The aqueous phase was extracted twice with MTB ether, and the combined organic phases were washed three times with water, dried over sodium sulfate and evaporated under reduced pressure. The crude product was filtered through silica gel with n-heptane, giving 129 g of 4-bromo-2-fluoro-1-pent-1-ynylbenzene as a yellow liquid. Hydrogenation on palladium/activated carbon (10%) in THF gave 131 g (100%) of 4-bromo-2-fluoro-1-pentylbenzene as a yellow liquid.

المصدر