Carbon tetrabromide → 3-(4-bromomethylphenyl)-1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazole

HRID 1038308

Reaktionsgleichung

Reaktionsgleichung von HRID 1038308
[F:1][C:2]([F:24])([F:23])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH:14]=[N:13][C:12]([C:15]3[CH:20]=[CH:19][C:18]([CH2:21]O)=[CH:17][CH:16]=3)=[N:11]2)=[CH:6][CH:5]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)(Br)[Br:45]>C1COCC1>[Br:45][CH2:21][C:18]1[CH:19]=[CH:20][C:15]([C:12]2[N:13]=[CH:14][N:10]([C:7]3[CH:8]=[CH:9][C:4]([O:3][C:2]([F:24])([F:23])[F:1])=[CH:5][CH:6]=3)[N:11]=2)=[CH:16][CH:17]=1

Komponenten

5

Edukt 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 66776992{4-[1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazol-3-yl]-phenyl}-methanol

Produkt 1

HCID 667770563-(4-bromomethylphenyl)-1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazoleAusbeute 77,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To a solution of {4-[1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazol-3-yl]-phenyl}-methanol (P-6; 5.033 g, 15.01 mmol) in THF (100 mL) was added triphenylphosphine (6.009 g, 22.91 mmol). Carbon tetrabromide (7.704 g, 23.23 mmol) dissolved in THF (20 mL) was then added dropwise at room temperature. The mixture was allowed to stir at room temperature for 23 h. It was then filtered through Celite, and the solvent was evaporated at room temperature under vacuum. The crude material was purified by silica gel chromatography, eluting with 50% EtOAc/hexane going to 70% EtOAc/hexane and then 100% EtOAc in a two-step gradient. The title product (4.61 g, 77%) was isolated as a beige solid: mp 124-126° C.; 1H NMR (300 MHz, CDCl3) δ 8.59 (s, 1H), 8.25-8.13 (m, 2H), 7.89-7.72 (m, 2H), 7.60-7.47 (m, 2H), 7.47-7.34 (m, 2H), 4.57 (s, 2H); ESIMS m/z 400 (M+2H), 399 (M+H).

Aufarbeitung

  1. additionwas then added dropwise at room temperature
  2. filtrationIt was then filtered through Celite
  3. customthe solvent was evaporated at room temperature under vacuum
  4. customThe crude material was purified by silica gel chromatography
  5. washeluting with 50% EtOAc/hexane going to 70% EtOAc/hexane

Quellen und Nachweise

ORD-Eintrag
ord-a3bc15047ab049ecbf9d63990fa29676
Quelldatensatz
uspto-grants-2013_10
Patentnummer
US08551914B2

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