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2-Bromopyridine → 4-(Pyridin-2-yloxy)benzonitrile

HRID 2167333
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2167333
[OH:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1.CC(C)([O-])C.[K+].C1COCC1.Br[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][N:23]=1>CS(C)=O>[N:23]1[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=1[O:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 79732-BromopyridineHCID 8028TetrahydrofuranHCID 130194-CyanophenolHCID 23665647Potassium tert-butoxide

Produkt 1

HCID 185258324-(Pyridin-2-yloxy)benzonitrileAusbeute 63,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 679
Dimethyl Sulfoxide
Lösungsmittel
2×

Reaktionsbedingungen

Temperatur
160 °C

Versuchsvorschrift

4-Hydroxybenzonitrile (1.00 g, 8.39 mmol) was dissolved in anhydrous DMSO (5.0 mL) and was slowly added a solution of potassium tert-butoxide in THF (1.0 M, 16.8 mmol). The solution was stirred for 2 hours 30 minutes. A solution of 2-bromopyridine (2.65 g, 16.8 mmol) in DMSO (5.0 mL) was then added to the reaction mixture the whole was heated at 160° C. for 115 hours. The cooled mixture was partitioned between ethyl acetate (100 mL) and water (100 mL). The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×100 mL). The organic layers were dried with MgSO4, filtered and concentrated in vacuo. The crude solid was placed on a silica gel column and purified (EtOAc/Hex 1:6) to give the product as a light yellow solid (1.04 g, 63%). 1H NMR (500 MHz, CDCL3) δ(ppm): 7.01 (1H, d, J=8.2 Hz), 7.10 (1H, dd, J=7.2, 5.0 Hz), 7.24 (2H, d, J=9.0 Hz), 7.68 (2H, d, J=8.8 Hz), 7.77 (1H, ddd, J=8.3, 7.3, 2.0 Hz), 8.22 (1H, dd, J=5.0, 2.0 Hz). 13C NMR (125 MHz, CDCL3) δ(ppm): 108.0, 112.8 (CH), 118.9, 120.0 (CH), 121.6 (CH), 134.1 (CH), 140.2 (CH), 147.9 (CH), 158.2, 162.5. MS (FAB+): 197 (MH+). HRMS for C12H8N2O (MH+): calculated: 197.0713; found 197.0715.

Aufarbeitung

  1. customThe cooled mixture was partitioned between ethyl acetate (100 mL) and water (100 mL)
  2. customThe organic layer was separated
  3. extractionthe aqueous layer was extracted with ethyl acetate (2×100 mL)
  4. dry with materialThe organic layers were dried with MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. custompurified (EtOAc/Hex 1:6)

Quellen und Nachweise

ORD-Eintrag
ord-bed928a24e1240ac8f21821ecbf989a7
Quelldatensatz
uspto-grants-2015_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09045442B2

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