Pyridine → 2-[N-(5-bromo-2-hydroxybenzyl)-N-ethylamino]-5-cyanopyridine

HRID 427753Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 427753
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([OH:21])=[C:6]([CH:20]=1)[CH2:7][N:8]([C:11]1[CH:16]=[CH:15][C:14]([C:17]([NH2:19])=O)=[CH:13][N:12]=1)[CH2:9][CH3:10].N1C=CC=CC=1.FC(F)(F)C(OC(=O)C(F)(F)F)=O>O1CCCC1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([OH:21])=[C:6]([CH:20]=1)[CH2:7][N:8]([C:11]1[CH:16]=[CH:15][C:14]([C:17]#[N:19])=[CH:13][N:12]=1)[CH2:9][CH3:10]

Komponenten

5

Edukt 3

HCID 1049Pyridine2×HCID 9845Trifluoroacetic anhydride2×HCID 183577602-[N-(5-Bromo-2-hydroxybenzyl)-N-ethylamino]pyridine-5-carboxamide

Produkt 1

HCID 183577802-[N-(5-bromo-2-hydroxybenzyl)-N-ethylamino]-5-cyanopyridineAusbeute 105,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

2-[N-(5-Bromo-2-hydroxybenzyl)-N-ethylamino]pyridine-5-carboxamide (example 4) (1.0 g, 2.85 mmol) was suspended in tetrahydrofuran (15 ml) and the stirred solution treated with pyridine (0.46 ml, 0.46 g, 5.7 mmol) and trifluoroacetic anhydride (0.9 ml, 1.35 g, 6.4 mmol) at ambient temperature (slight exotherm). A yellow colour became apparent and the solid dissolved in the THF. The solution was left standing at ambient temperature overnight, then further pyridine (0.46 ml, 5.7 mmol) and TFAA (0.90 ml, 6.4 mmol) were added and the reaction was again left overnight. The mixture was evaporated to low volume, saturated sodium bicarbonate solution was added and the mixture stirred at ambient temperature for 30 minutes, evaporated to low volume and the resultant white precipitate filtered, washed with water and air dried to give 2-[N-(5-bromo-2-hydroxybenzyl)-N-ethylamino]-5-cyanopyridine as a white solid (1.0 g, 100%).

Aufarbeitung

  1. waitThe solution was left
  2. waitthe reaction was again left overnight
  3. customThe mixture was evaporated to low volume, saturated sodium bicarbonate solution
  4. additionwas added
  5. customevaporated to low volume
  6. filtrationthe resultant white precipitate filtered
  7. washwashed with water and air
  8. customdried

Quellen und Nachweise

ORD-Eintrag
ord-f36f63e2971b4764afcd427e6f19e82e
Quelldatensatz
uspto-grants-2001_11
Patentnummer
US06313148B1

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