Reaktion #7872

Reaktionsgleichung

3-aminopyridine

triethylamine

trimethylacetyl chloride

→

N-(pyridin-3-yl)-2,2-dimethylpropanamide

Lösungsmittel

CH2Cl2

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe mixture was concentrated in vacuo
2. 2
   Sonstigethe residue partitioned between EtOAc and H2O
3. 3
   Sonstigethe layers separated
4. 4
   Extraktionextracted with EtOAc
5. 5
   WaschenThe combined organic layers were washed with saturated NaHCO3 and brine
6. 6
   Trocknendried over MgSO4
7. 7
   Filtrationfiltered
8. 8
   Einengenconcentrated in vacuo

Vorschrift

To a stirred solution of 3-aminopyridine (9.41 g, 100 mmol) and triethylamine (16.7 mL, 120 mmol) in CH2Cl2 (300 mL) at 0° C. was added trimethylacetyl chloride (14.8 mL, 120 mmol) dropwise over 15 min. The reaction was warmed to rt and stirred overnight. The mixture was concentrated in vacuo, the residue partitioned between EtOAc and H2O, and the layers separated. The aqueous layer was made basic with saturated NaHCO3 and extracted with EtOAc. The combined organic layers were washed with saturated NaHCO3 and brine, dried over MgSO4, filtered, and concentrated in vacuo to give N-(pyridin-3-yl)-2,2-dimethylpropanamide as a tan solid. 1H NMR (CDCl3, 300 MHz) δ 8.57 (d, 1H), 8.33 (dd, 1H), 8.17 (ddd, 1H), 7.69 (br s, 1H), 7.27 (dd, 1H), 1.33 (s, 9H).

Quelle