反応 #52056

反応方程式

2-Ethoxy-6-pentadecyl benzaldehyde

ethyl acetoacetate

Acetic acid

piperidine

Ethyl-3-amino crotonate

→

diethyl 1,4-dihydro-4-(2′-ethoxy-6′-pentadecyl phenyl)-2,6-dimethyl-3,5-pyridine dicarboxylate

溶媒

n-butanol

反応条件

後処理

1. 1
   温度refluxed for 10 hrs
2. 2
   その他n-Butanol was evaporated
3. 3
   その他reaction mixture
4. 4
   洗浄was washed with distilled water
5. 5
   抽出extracted with dichloromethane (10 mL)
6. 6
   乾燥Organic layer was dried over sodium sulfate
7. 7
   その他evaporated
8. 8
   その他compound was purified by column chromatography

実験手順

2-Ethoxy-6-pentadecyl benzaldehyde (3 g, 8.3 mmol) and ethyl acetoacetate (1.08 g, 8.3 mmol) were dissolved in n-butanol (20 mL). Acetic acid (0.5 g, 8.3 mmol) and piperidine (0.7 g, 8.3 mmol) were added and stirred at room temperature for 3-4 hrs. Ethyl-3-amino crotonate (1.08 g, 8.3 mmol) was then added and refluxed for 10 hrs. n-Butanol was evaporated and reaction mixture was washed with distilled water and extracted with dichloromethane (10 mL). Organic layer was dried over sodium sulfate, evaporated and compound was purified by column chromatography using silicagel (100-200 mesh) with hexane:EtOAc (94:6) solvent system to give diethyl 1,4-dihydro-4-(2′-ethoxy-6′-pentadecyl phenyl)-2,6-dimethyl-3,5-pyridine dicarboxylate as white powder.

出典