Triphenylphosphine → 4,5-difluoro-9H-carbazole
Reaktionsgleichung
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([N+:8]([O-])=O)[C:3]=1[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[F:17].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>ClC1C=CC=CC=1Cl>[F:1][C:2]1[C:3]2[C:11]3[C:16](=[CH:15][CH:14]=[CH:13][C:12]=3[F:17])[NH:8][C:4]=2[CH:5]=[CH:6][CH:7]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of 2,2′-difluoro-6-nitro-1,1′-biphenyl (0.740 g, 3.1 mmol) and triphenylphosphine (2.063 g, 7.9 mmol) in anhydrous 1,2-dichlorobenzene (1.5 mL) was heated to 175° C. in a microwave reactor for 3 hrs. The mixture was cooled to room temperature and purified by silica gel chromatography (5-50% methylene chloride/hexanes) to afford the product as a white solid (0.28 g, 44%). 1H NMR (CDCl3, 300 MHz) δ 8.26 (br s, 1H), 7.39 (tt, 2H, J=8.1, 2.4 Hz), 7.22 (d, 2H, J=8.1 Hz), 6.97 (dt, 2H, J=8.1, 5.1 Hz).