Hydrochloric Acid → (E)-2-(2,6-Difluorostyryl)-1-(2-pyridyl)-1H-benzimidazole hydrochloride

HRID 50888Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 50888
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[NH:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[NH2:14].[F:15][C:16]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:17]=1/[CH:18]=[CH:19]/[C:20]([Cl:22])=O.N1C=CC=CC=1N1C2C=CC=CC=2N=C1/C=C/C1C=CC=CC=1.Cl>CO>[ClH:22].[F:15][C:16]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:17]=1/[CH:18]=[CH:19]/[C:20]1[N:7]([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=2)[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[N:14]=1

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 752150N1-(pyridin-2-yl)benzene-1,2-diamineHCID 9796241(E)-1-(2-pyridyl)-2-styryl-1H-benzimidazoleHCID 11424232(E)-2,6-difluorocinnamoyl chloride

Produkt 1

HCID 9820681(E)-2-(2,6-Difluorostyryl)-1-(2-pyridyl)-1H-benzimidazole hydrochloride

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a solution of (E)-2,6-difluorocinnamic acid (331 mg, 1.8 mmol) in benzene (10 ml) was added thionyl chloride (0.5 ml) and the mixture was heated to reflux for 60 min. Volatiles were removed by evaporation to give crude (E)-2,6-difluorocinnamoyl chloride. Free base of the titled compound was prepared from N-(2-pyridyl)-o-phenylenediamine (250 mg, 1.4 mmol) and (E)-2,6-difluorocinnamoyl chloride obtained as above according to the preparation of (E)-1-(2-pyridyl)-2-styryl-1H-benzimidazole (Example 1, method A). The free base was dissolved with a 10% methanol solution of hydrogen chloride (5 ml). Concentration and recrystallization from ethyl acetate/ethanol yielded the titled compound. MW: 369.80; mp: 204.5-206.5° C.; 1H-NMR (DMSO) δ: 8.82-8.77 (1H, m), 8.29-8.18 (1H, m), 8.00 (1H, d, J=16.5 Hz), 7.89-7.80 (2H, m), 7.74-7.66 (1H, m), 7.58-7.34 (4H, m), 7.39 (1H, d, J=16.5 Hz), 7.27-7.16 (2H, m).

Aufarbeitung

  1. customobtained as
  2. concentrationConcentration and recrystallization from ethyl acetate/ethanol

Quellen und Nachweise

ORD-Eintrag
ord-c18a5ae38bd141a6a728c4e97d3b649e
Quelldatensatz
uspto-grants-2004_03
Patentnummer
US06713482B2

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