2,2'-Bipyridine → (E)-ethyl 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-enyl)-2-methylbenzoate

HRID 1502945Notes

Reaction equation

HRID 1502945 reaction equation
[CH3:1][C:2]1[CH:12]=[C:11]([CH:13]=[CH2:14])[CH:10]=[CH:9][C:3]=1[C:4]([O:6][CH2:7][CH3:8])=[O:5].Br[CH:16]([C:21]1[CH:26]=[C:25]([Cl:27])[CH:24]=[C:23]([Cl:28])[CH:22]=1)[C:17]([F:20])([F:19])[F:18].N1C=CC=CC=1C1C=CC=CN=1>ClC1C=CC=CC=1Cl.[Cu]Cl>[Cl:27][C:25]1[CH:26]=[C:21]([CH:16]([C:17]([F:20])([F:18])[F:19])/[CH:14]=[CH:13]/[C:11]2[CH:10]=[CH:9][C:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])=[C:2]([CH3:1])[CH:12]=2)[CH:22]=[C:23]([Cl:28])[CH:24]=1

Participants

6

Reactant 3

HCID 14742,2'-BipyridineHCID 58390837Ethyl 2-methyl-4-vinylbenzoateHCID 866751181-(1-Bromo-2,2,2-trifluoroethyl)-3,5-dichlorobenzene

Product 1

HCID 86675123(E)-ethyl 4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-enyl)-2-methylbenzoateYield 40%

Reagents, catalysts & solvents 2

HCID 62652Cuprous chlorideCatalystHCID 72391,2-DichlorobenzeneSolvent

Conditions

Temperature
180 °C

Procedure

To a stirred solution of ethyl 2-methyl-4-vinylbenzoate (2.0 g, 10.5 mmol) in 1,2-dichlorobenzene (25 mL) were added 1-(1-bromo-2,2,2-trifluoroethyl)-3,5-dichlorobenzene (6.44 g, 21.0 mmol), copper(I) chloride (CuCl; 208 mg, 21 mmol) and 2,2bipyridyl (0.65 g, 4.1 mmol). The reaction mixture was degassed with argon for 30 min and then stirred at 180° C. for 24 h. After the reaction was deemed complete by TLC, the reaction mixture was cooled to 25° C. and filtered, and the filtrate was concentrated under reduced pressure. Purification by flash chromatography (SiO2, 100-200 mesh; eluting with 25-30% EtOAc in petroleum ether) afforded the title compound as a solid (1.7 g, 40%): 1H NMR (400 MHz, CDCl3) δ 7.91 (d, J=8.0 Hz, 1H), 7.37 (m, 1H), 7.27-7.24 (m, 4H), 6.59 (d, J=16.0 Hz, 1H), 6.59 (dd, J=16.0, 8.0 Hz, 1H), 4.38 (q, J=7.2 Hz, 2H), 4.08 (m, 1H), 2.62 (s, 3H), 1.42 (t, J=7.2 Hz, 3H); ESIMS m/z 415.06 ([M−H]−); IR (thin film) 1717, 1255, 1114 cm−1.

Workup

  1. customThe reaction mixture was degassed with argon for 30 min
  2. temperaturethe reaction mixture was cooled to 25° C.
  3. filtrationfiltered
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customPurification
  6. washby flash chromatography (SiO2, 100-200 mesh; eluting with 25-30% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-48365a76eb6849489dfe285ce7d7fdc9
Source dataset
uspto-grants-2015_12
Patent number
US09211281B2

Reaction notes

Loading…