2,2'-Bipyridine → (E)-1-(4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-en-1-yl)phenyl)-1H-1,2,4-triazole

HRID 587757Notes

Reaction equation

HRID 587757 reaction equation
Br[CH:2]([C:7]1[CH:12]=[C:11]([Cl:13])[CH:10]=[C:9]([Cl:14])[CH:8]=1)[C:3]([F:6])([F:5])[F:4].[CH:15]([C:17]1[CH:22]=[CH:21][C:20]([N:23]2[CH:27]=[N:26][CH:25]=[N:24]2)=[CH:19][CH:18]=1)=[CH2:16].N1C=CC=CC=1C1C=CC=CN=1>ClC1C=CC=CC=1Cl.Cl[Cu]>[Cl:14][C:9]1[CH:8]=[C:7]([CH:2]([C:3]([F:6])([F:5])[F:4])/[CH:16]=[CH:15]/[C:17]2[CH:18]=[CH:19][C:20]([N:23]3[CH:27]=[N:26][CH:25]=[N:24]3)=[CH:21][CH:22]=2)[CH:12]=[C:11]([Cl:13])[CH:10]=1

Participants

6

Reactant 3

HCID 14742,2'-BipyridineHCID 585499641-(4-vinylphenyl)-1H-1,2,4-triazoleHCID 866751181-(1-Bromo-2,2,2-trifluoroethyl)-3,5-dichlorobenzene

Product 1

HCID 86675223(E)-1-(4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-en-1-yl)phenyl)-1H-1,2,4-triazoleYield 32%

Reagents, catalysts & solvents 2

HCID 62652Cuprous chlorideCatalystHCID 72391,2-DichlorobenzeneSolvent

Conditions

Temperature
180 °C

Procedure

To a stirred solution of 1-(1-bromo-2,2,2-trifluoro-ethyl)-3,5-dichloro-benzene (2.0 g, 6.51 mmol) in 1,2-dichlorobenzene (25 mL), were added 1-(4-vinyl-phenyl)-1H-[1,2,4]triazole (2.22 g, 13.0 mmol), CuCl (64 mg, 0.65 mmol) and 2,2-bipyridyl (0.2 g, 1.3 mmol). The resultant reaction mixture was degassed with argon for 30 min, then stirred at 180° C. for 24 h. After completion of reaction (TLC), the reaction mixture was cooled to ambient temperature and filtered and the filtrate concentrated under reduced pressure. Purification by flash chromatography (SiO2, 100-200 mesh; 25-30% EtOAc in petroleum ether) afforded the title compound as an off-white solid (0.8 g, 32%): mp 93-97° C.; 1H NMR (300 MHz, CDCl3) δ 8.56 (s, 1H), 8.11 (s, 1H), 7.68 (d, J=8.4 Hz, 2H), 7.54 (d, J=8.4 Hz, 2H), 7.38 (t, J=1.8 Hz, 1H), 7.29 (s, 2H), 6.62 (d, J=15.6 Hz, 1H), 6.42 (dd, J=15.6, 8.2 Hz, 1H), 4.15 (m, 1H); ESIMS m/z 398.05 ([M+H]+).

Workup

  1. customThe resultant reaction mixture
  2. customwas degassed with argon for 30 min
  3. customAfter completion of reaction (TLC)
  4. temperaturethe reaction mixture was cooled to ambient temperature
  5. filtrationfiltered
  6. concentrationthe filtrate concentrated under reduced pressure
  7. customPurification by flash chromatography (SiO2, 100-200 mesh; 25-30% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-f4bfb7dd0be54c86930967c8962b8e5e
Source dataset
uspto-grants-2016_01
Patent number
US09226501B2

Reaction notes

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