Potassium vinyltrifluoroborate → (5-Chloro-2-vinylpyridin-3-yl)(2-fluoro-3-methoxy-6-vinylphenyl)methanone

HRID 222317Notes

Reaction equation

HRID 222317 reaction equation
Cl[C:2]1[C:7]([C:8]([C:10]2[C:15]([CH:16]=[CH2:17])=[CH:14][CH:13]=[C:12]([O:18][CH3:19])[C:11]=2[F:20])=[O:9])=[CH:6][C:5]([Cl:21])=[CH:4][N:3]=1.[CH:22]([B-](F)(F)F)=[CH2:23].[K+]>C(O)CC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[Cl:21][C:5]1[CH:6]=[C:7]([C:8]([C:10]2[C:15]([CH:16]=[CH2:17])=[CH:14][CH:13]=[C:12]([O:18][CH3:19])[C:11]=2[F:20])=[O:9])[C:2]([CH:22]=[CH2:23])=[N:3][CH:4]=1

Participants

5

Reactant 2

HCID 23679353Potassium vinyltrifluoroborateHCID 86609786(2,5-Dichloropyridin-3-yl)(2-fluoro-3-methoxy-6-vinylphenyl)methanone

Product 1

HCID 57722878(5-Chloro-2-vinylpyridin-3-yl)(2-fluoro-3-methoxy-6-vinylphenyl)methanone

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 10311-PropanolSolvent

Procedure

To a stirred solution of (2,5-dichloropyridin-3-yl)(2-fluoro-3-methoxy-6-vinylphenyl)methanone (11.6 g, 35.6 mmol) in nPrOH (200 mL) were added potassium vinyltrifluoroborate (5.00 g, 37.3 mmol), PdCl2(dppf) (580 mg, 0.71 mmol), and TEA (4.96 mL, 35.6 mmol). The reaction mixture was purged with N2 for 10 min, heated to reflux for 3 h, cooled to room temperature, treated with water, and concentrated. The residue was extracted with EtOAc (×3). The combined organics were washed with brine, dried (Na2SO4), concentrated, and purified by flash chromatography to afford the title compound. 1H NMR (600 MHz, CDCl3) δ 8.63 (d, 1H); 7.62 (d, 1H); 7.41 (d, 1H); 7.36 (dd, 1H); 7.09 (t, 1H); 6.57 (dd, 1H); 6.54 (d, 1H); 5.63 (m, 2H); 5.23 (d, 1H); 3.92 (s, 3H). LRMS (ESI) calc'd for (C17H13ClFNO2) [M+H]+, 318.1; found 318.1.

Workup

  1. customThe reaction mixture was purged with N2 for 10 min
  2. temperatureheated
  3. temperatureto reflux for 3 h
  4. additiontreated with water
  5. concentrationconcentrated
  6. extractionThe residue was extracted with EtOAc (×3)
  7. washThe combined organics were washed with brine
  8. dry with materialdried (Na2SO4)
  9. concentrationconcentrated
  10. custompurified by flash chromatography

Sources & evidence

ORD record
ord-c1ce650d145649f89c3e2383c0e348cc
Source dataset
uspto-grants-2012_06
Patent number
US08207186B2

Reaction notes

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