Sodium Carbonate → 3-Chloro-4-(2-methyl-5-nitrophenyl)pyridine

HRID 13497

Reaktionsgleichung

Reaktionsgleichung von HRID 13497
Br[C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[CH:4][C:3]=1[CH3:11].O.[Cl:13][C:14]1[CH:15]=[N:16][CH:17]=[CH:18][C:19]=1B(O)O.C(=O)([O-])[O-].[Na+].[Na+]>C(COC)OC.O.[Pd](Cl)Cl.C1(P([C-]2C=CC=C2)C2C=CC=CC=2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2]>[Cl:13][C:14]1[CH:15]=[N:16][CH:17]=[CH:18][C:19]=1[C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[CH:4][C:3]=1[CH3:11]

Komponenten

7

Edukt 3

HCID 10340Sodium CarbonateHCID 821892-Bromo-4-nitrotolueneHCID 179987563-Chloro-4-pyridineboronic acid hydrate

Produkt 1

HCID 220408203-Chloro-4-(2-methyl-5-nitrophenyl)pyridine

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)KatalysatorHCID 962WaterLösungsmittelHCID 80711,2-DimethoxyethaneLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

Nitrogen was bubbled through a solution of 2-bromo-1-methyl-4-nitrobenzene (1 eq) in dimethoxyethane and water (3:1) for 0.5 h. Bis(diphenylphosphino)ferrocene Palladium(II)chloride (0.05 eq) followed by 3-chloro-4-pyridine boronic acid hydrate (1 eq) and sodium carbonate (3 eq) was added and the mixture was heated to 90° C. for 16 h under nitrogen. The reaction mixture was concentrated and partitioned between ethyl acetate and water. The organic layer was washed with brine and dried with sodium sulfate and concentrated. Purification on silica gel gave 3-chloro-4-(2-methyl-5-nitrophenyl)pyridine. MS: MH+=248.

Aufarbeitung

  1. additionwas added
  2. concentrationThe reaction mixture was concentrated
  3. custompartitioned between ethyl acetate and water
  4. washThe organic layer was washed with brine
  5. dry with materialdried with sodium sulfate
  6. concentrationconcentrated
  7. customPurification on silica gel

Quellen und Nachweise

ORD-Eintrag
ord-b33daae7328346a6bc77c365a8963751
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07728010B2

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