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Sodium Carbonate → Methyl 2-[4-[4-(5-bromopyridin-2-yl)phenyl]cyclohexyl]acetate

HRID 76054
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 76054
[CH3:1][O:2][C:3](=[O:26])[CH2:4][CH:5]1[CH2:10][CH2:9][CH:8]([C:11]2[CH:16]=[CH:15][C:14](B3OC(C)(C)C(C)(C)O3)=[CH:13][CH:12]=2)[CH2:7][CH2:6]1.Br[C:28]1[CH:33]=[CH:32][C:31]([Br:34])=[CH:30][N:29]=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.C(O)C>[CH3:1][O:2][C:3](=[O:26])[CH2:4][CH:5]1[CH2:6][CH2:7][CH:8]([C:11]2[CH:12]=[CH:13][C:14]([C:28]3[CH:33]=[CH:32][C:31]([Br:34])=[CH:30][N:29]=3)=[CH:15][CH:16]=2)[CH2:9][CH2:10]1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 10340Sodium CarbonateHCID 693532,5-DibromopyridineHCID 57992171Methyl 2-(trans-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)cyclohexyl)acetate

Produkt 1

HCID 66615782Methyl 2-[4-[4-(5-bromopyridin-2-yl)phenyl]cyclohexyl]acetate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 21863594Toluene ethanolLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of {4-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-cyclohexyl}-acetic acid methyl ester (4.0 g, 11.2 mmol, 1.0 equiv) and 2,5-dibromopyridine (3.2 g, 13.4 mmol, 1.2 equiv) in 50 Ml toluene/ethanol (1:1) was added 2 M Na2CO3 (16.8 Ml, 3 equiv) followed by Pd(PPh3)4 (0.38 g, 0.34 mmol, 0.03 equiv). The biphasic mixture was sparged with nitrogen for 10 min, then heated to 60° C. for 3 days. The reaction was cooled to room temperature and then partitioned between ethyl acetate and saturated ammonium chloride solution. The organic extracts were washed with brine, then dried over sodium sulphate and concentrated in vacuo. Purification by silica gel chromatography (7-40% EtOAc in hexanes) afforded the title compound as a yellow solid: 1H NMR (400 MHz, CDCl3) δ 1.11 (dd, J=13.01, 2.15 Hz, 2H) 1.41-1.54 (m, 2H) 1.76-1.90 (m, 5H) 2.20 (d, J=6.57 Hz, 2H) 2.46 (tt, J=12.09, 3.19 Hz, 1H) 3.62 (s, 3H) 7.23 (d, J=8.08 Hz, 2H) 7.53 (dd, J=8.59, 0.76 Hz, 1H) 7.77 (dd, J=8.46, 2.40 Hz, 1H) 7.81 (q, J=3.87 Hz, 1H) 7.81 (d, J=8.34 Hz, 1H) 8.64 (d, J=1.77 Hz, 1H); (M+H)+390.0.

Aufarbeitung

  1. customThe biphasic mixture was sparged with nitrogen for 10 min
  2. temperatureThe reaction was cooled to room temperature
  3. custompartitioned between ethyl acetate and saturated ammonium chloride solution
  4. washThe organic extracts were washed with brine
  5. dry with materialdried over sodium sulphate
  6. concentrationconcentrated in vacuo
  7. customPurification by silica gel chromatography (7-40% EtOAc in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-7267efd4ee274a7db2494ddbc6b9faa3
Quelldatensatz
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08835451B2

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