6-Bromo-2-fluoro-3-methoxybenzaldehyde → 2-Fluoro-3-methoxy-6-vinylbenzaldehyde

HRID 1987141Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1987141
Br[C:2]1[C:7]([CH:8]=[O:9])=[C:6]([F:10])[C:5]([O:11][CH3:12])=[CH:4][CH:3]=1.[CH:13]([B-](F)(F)F)=[CH2:14].[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]>[F:10][C:6]1[C:5]([O:11][CH3:12])=[CH:4][CH:3]=[C:2]([CH:13]=[CH2:14])[C:7]=1[CH:8]=[O:9]

Komponenten

5

Edukt 2

HCID 231579156-Bromo-2-fluoro-3-methoxybenzaldehydeHCID 23679353Potassium vinyltrifluoroborate

Produkt 1

HCID 577227732-Fluoro-3-methoxy-6-vinylbenzaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 2

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

Versuchsvorschrift

To a stirred solution of 6-bromo-2-fluoro-3-methoxybenzaldehyde (13 g, 56 mmol) in nPrOH (200 mL) were added potassium vinyltrifluoroborate (7.9 g, 59 mmol), PdCl2(dppf) (0.91 g, 1.1 mmol), and TEA (7.8 mL, 56 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 10.53 (s, 1H); 7.43 (dd, 1H); 7.31 (d, 1H); 7.16 (t, 1H); 5.60 (d, 1H); 5.36 (d, 1H); 3.95 (s, 3H).

Aufarbeitung

  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

Quellen und Nachweise

ORD-Eintrag
ord-42d8d05eba7d410494dbb9a287c1de5c
Quelldatensatz
uspto-grants-2009_06
Patentnummer
US07550478B2

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