반응 #11842

반응 방정식

4,4′-Dibromo-2-amino-1,1′-biphenyl

4-iodoanisole

potassium carbonate

nitrobenzene

→

off-white crystals

4,4′-Dibromo-2-Bis(4-Methoxyphenyl)Amino-1,1′-Biphenyl

용매

toluene

반응 조건

후처리

1. 1
   온도at gentle reflux for 15 hours
2. 2
   기타The dark reaction mixture
3. 3
   추출extracted with 200 ml of toluene
4. 4
   기타The toluene solution was evaporated
5. 5
   기타The dark residue obtained
6. 6
   기타chromatographed on a silica gel column
7. 7
   workup.ADDITIONThe portions containing the product
8. 8
   기타were collected
9. 9
   기타evaporated
10. 10
    기타The residue was recrystallized twice from hexane/toluene (300 ml/60 ml)

실험 절차

4,4′-Dibromo-2-amino-1,1′-biphenyl (16.35 g, 0.05 mol), 4-iodoanisole (28 g, 0.12 mol), potassium carbonate (−325 mesh fine powder, 16.6 g, 0.12 mole), copper dust (−150 mesh,1.0 g), and nitrobenzene (20 ml) were charged into a flask and stirred at gentle reflux for 15 hours. The dark reaction mixture was cooled to room temperature and extracted with 200 ml of toluene. The toluene solution was evaporated. The dark residue obtained was then mixed with 10 ml of toluene and chromatographed on a silica gel column using hexane and hexane/ethyl acetate (20:1) eluant. The portions containing the product were collected and evaporated. The residue was recrystallized twice from hexane/toluene (300 ml/60 ml) to yield 7.4 grams of off-white crystals of the desired monomer. 1H NMR (CDCl3): δ=6.8–7.5 (15H, multiple peaks); 3.78 (6H).

출처