تفاعل #2439928

معادلة التفاعل

4-bromo-4′-ethylbiphenyl

3-fluorophenyl dihydroxyborane

potassium carbonate

toluene

→

residue

المردود 145.4%

4″-ethyl-3-fluoro-[1,1′; 4′,1″]terphenyl

المردود 145.4%

المذيبات

water

ethanol

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةwas refluxed for 6 hours
2. 2
   أخرىto obtain a reaction solution
3. 3
   أخرىAfter removing the catalyst
4. 4
   ترشيحby filtration, 50 mL of toluene
5. 5
   workup.ADDITIONwas added to the reaction solution, which
6. 6
   غسيلwas then washed with water
7. 7
   غسيلThe reaction solution having been washed with water
8. 8
   تجفيفwas dried over anhydrous magnesium sulfate
9. 9
   workup.DISTILLATIONthe solvent was distilled off from the reaction solution under reduced pressure

الإجراء التجريبي

A mixture of 5.6 g (21.4 mmol) of 4-bromo-4′-ethylbiphenyl, 3.6 g (25.7 mmol) of 3-fluorophenyl dihydroxyborane, 4.4 g (32.2 mmol) of potassium carbonate, 0.3 g of 5%-Pd/C and 60 mL of a mixed solvent of toluene, ethanol and water (ratio: 1/1/1) was refluxed for 6 hours to obtain a reaction solution. After removing the catalyst by filtration, 50 mL of toluene was added to the reaction solution, which was then washed with water. The reaction solution having been washed with water was dried over anhydrous magnesium sulfate, and the solvent was distilled off from the reaction solution under reduced pressure to obtain 8.6 g of a residue. The residue was purified by silica gel column chromatography (eluent: heptane/toluene=4/1) to obtain 5.1 g of crude crystals of the compound (E-8). The crude crystals were dissolved in a mixed solvent of ethanol and ethyl acetate (ratio: 10/1) and recrystallized therefrom to obtain 4.5 g of purified crystals of the compound (E-8).

المصدر