反応 #7872

反応方程式

3-aminopyridine

triethylamine

trimethylacetyl chloride

→

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

溶媒

CH2Cl2

反応条件

後処理

1. 1
   濃縮The mixture was concentrated in vacuo
2. 2
   その他the residue partitioned between EtOAc and H2O
3. 3
   その他the layers separated
4. 4
   抽出extracted with EtOAc
5. 5
   洗浄The combined organic layers were washed with saturated NaHCO3 and brine
6. 6
   乾燥dried over MgSO4
7. 7
   ろ過filtered
8. 8
   濃縮concentrated in vacuo

実験手順

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).

出典