Sodium Carbonate → Methyl 3-bromobiphenyl-2-carboxylate

HRID 84949Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 84949
Br[C:2]1[CH:11]=[CH:10][CH:9]=[C:8]([Br:12])[C:3]=1[C:4]([O:6][CH3:7])=[O:5].[C:13]1(B(O)O)[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(=O)([O-])[O-].[Na+].[Na+]>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1(C)C=CC=CC=1>[Br:12][C:8]1[CH:9]=[CH:10][CH:11]=[C:2]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[C:3]=1[C:4]([O:6][CH3:7])=[O:5]

Komponenten

6

Edukt 3

HCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 817273Methyl 2,6-dibromobenzoate

Produkt 1

HCID 13352656Methyl 3-bromobiphenyl-2-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 1140TolueneLösungsmittel

Versuchsvorschrift

A mixture of the product from Example 114A (2.2 g, 7.5 mmol), phenylboronic acid (919 mg, 7.5 mmol), sodium carbonate (7.55 mL, 2 M aqueous solution, 15.1 mmol) tetrakis(triphenylphosphine)palladium(0) (261 mg, 0.23 mmol) and 50 mL of toluene were refluxed for 16 hours under nitrogen. The reaction was cooled and partitioned between 50 mL of water and 50 mL of ethyl acetate. The aqueous portion was separated and extracted with 2×25 mL of ethyl acetate and the combined organic extracts were washed with 2×25 mL of water and 1×25 mL of brine and dried over sodium sulfate. The organic solution was concentrated and the residue was purified via flash chromatography on a silica gel column (95:5 hexane:ethyl acetate) to afford the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 3.63 (s, 3H) 7.35-7.60 (m, 6H) 7.71-7.79 (m, 2H); MS (DCI+) m/z 308.0 [M+NH4]+.

Aufarbeitung

  1. temperaturewere refluxed for 16 hours under nitrogen
  2. temperatureThe reaction was cooled
  3. custompartitioned between 50 mL of water and 50 mL of ethyl acetate
  4. customThe aqueous portion was separated
  5. extractionextracted with 2×25 mL of ethyl acetate
  6. washthe combined organic extracts were washed with 2×25 mL of water and 1×25 mL of brine
  7. dry with materialdried over sodium sulfate
  8. concentrationThe organic solution was concentrated
  9. customthe residue was purified via flash chromatography on a silica gel column (95:5 hexane:ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-c1cb02d738834c31ad8427d728482b7e
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846951B2

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