反応 #1730670

反応方程式

NaH

1-(4-(trifluoromethyl)phenyl)-piperidin-4-ol

NaH

CH2Cl2

6-chloro-N-(1-(pyridin-4-ylmethyl)piperidin-4-yl)picolinamide

→

N-(1-(pyridin-4-ylmethyl)piperidin-4-yl)-6-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)picolinamide

収率 25.0%

溶媒

DMF

ethyl ether

MeOH CH2Cl2

反応条件

後処理

1. 1
   その他The resulting reaction mixture
2. 2
   workup.STIRRINGwas then stirred
3. 3
   温度with heating at 105° C. overnight
4. 4
   workup.STIRRINGto stir at 105° C. for an additional 8 h
5. 5
   その他quenched with saturated sodium bicarbonate solution (20 mL)
6. 6
   抽出The aqueous layer was extracted with ethyl acetate (3×20 mL)
7. 7
   洗浄the combined organic layer was washed with water (2×20 mL) and brine (1×20 mL)
8. 8
   乾燥dried (MgSO4)
9. 9
   ろ過filtered
10. 10
    濃縮concentrated
11. 11
    その他to give a yellow residue

実験手順

To a solution of 1-(4-(trifluoromethyl)phenyl)-piperidin-4-ol (0.1 g, 0.4 mmol) in anhydrous DMF, NaH (60% in mineral oil, 18 mg, 0.45 mmol) was added. The mixture was allowed to stir at room temperature under N2 atmosphere for 10 min, followed by the addition of 6-chloro-N-(1-(pyridin-4-ylmethyl)piperidin-4-yl)picolinamide (0.15 g, 0.4 mmol). The resulting reaction mixture was then stirred with heating at 105° C. overnight. A significant amount of starting material was still present and hence, an additional amount of NaH was added (82 mg, 2.1 mmol). The reaction mixture was allowed to stir at 105° C. for an additional 8 h, and quenched with saturated sodium bicarbonate solution (20 mL). The aqueous layer was extracted with ethyl acetate (3×20 mL), and the combined organic layer was washed with water (2×20 mL) and brine (1×20 mL), dried (MgSO4), filtered and concentrated to give a yellow residue. Column chromatography (100% CH2Cl2→3% MeOH/CH2Cl2) provided a yellow solid, which upon trituration with ethyl ether, yielded N-(1-(pyridin-4-ylmethyl)piperidin-4-yl)-6-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)picolinamide as a tan solid (54 mg, 25%). 1H NMR (CD3OD) δ 8.53 (d, J=4.1 Hz, 2H), 8.28 (d, J=7.4 Hz, 1H), 7.80 (t, J=7.7 Hz, 1H), 7.65 (d, J=7.2 Hz, 1H), 7.51 (d, J=4.1 Hz, 2H), 7.46 (d, J=8.5 Hz, 2H), 7.05 (d, J=8.3 Hz, 2H), 6.96 (d, J=8.3 Hz, 1H), 5.43 (br s, 1H), 4.10-3.95 (m, 1H), 3.90 (s, 2H), 3.77-3.56 (m, 2H), 3.23-2.98 (m, 3H), 2.71-2.57 (m, 2H), 2.23-1.81 (m, 9H). MS (m/z): 540 (M+H)+.

出典