反応 #159273

反応方程式

4-bromo nitrobenzene

butyl acrylate

ammonium acetate

→

butyl 4-nitro-trans-cinnamate

収率 87.0%

溶媒

ether

1,2-dimethoxyethane

反応条件

後処理

1. 1
   温度The reaction mixture was cooled to room temperature
2. 2
   ろ過filtered through a polyethylene frit (20-micron porosity)
3. 3
   洗浄The filtrate was washed with water (2×20 mL), brine (20 mL)
4. 4
   乾燥dried (MgSO4)
5. 5
   その他Evaporation
6. 6
   その他under reduced pressure and purification by column chromatography

実験手順

Microencapsulated Pd(OAc)2 (prepared as described in Example 1, 0.25 g, 2 mol %, based on palladium content) was added to a solution of 4-bromo nitrobenzene (1 mmol), butyl acrylate (1.5 mmol) and ammonium acetate (3 mmol) in 1,2-dimethoxyethane (5 mL) and stirred at 90° C. for 8 h. The reaction mixture was cooled to room temperature, diluted with ether (50 mL) and filtered through a polyethylene frit (20-micron porosity). The filtrate was washed with water (2×20 mL), brine (20 mL) and dried (MgSO4). Evaporation under reduced pressure and purification by column chromatography gave butyl 4-nitro-trans-cinnamate 87%; IR: 1709, 1643, 1519 and 1343; 1H NMR (400 MHz; CDCl3): 8.24 (2H, d, J 8.8), 7.7 (1H, d, J 15.6), 7.67 (2H, d, J 8.5), 6.55 (1H, d, J 16.1), 4.23 (2H, t, J 7), 1.7 (2H, qn, J 7.6), 1.44 (2H, sext, J 7.6) and 0.97 (3H, t, J 7.4); 13C NMR (CDCl3): 166.0, 148.4, 141.5, 140.6, 128.5, 124.1, 122.6, 64.8, 30.6, 19.1 and 13.6.

出典