Stilbene derivative with nitrogen monoxide donor, and preparation method of derivative
A technology of nitric oxide and stilbene, applied in the direction of organic chemistry, etc., can solve problems such as weak activity, and achieve the effects of strong activity, good promotion and application value, and good application effect.
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Embodiment 1
[0056] Embodiment 1: Preparation of brominated stilbene derivatives
[0057] Add 5.12g of pterostilbene, 1.38g of anhydrous potassium carbonate, and 100ml of acetone into a 250ml three-necked reaction flask, and heat to boiling. When the solution is clear, add 8.6ml of 1,2-dibromoethane dropwise. Reflux reaction for 24h. The solution was suction filtered, and the filtrate was concentrated to obtain an oily product. After separation by silica gel column (120 g of 300-400 mesh silica gel) chromatography (eluent: petroleum ether: ethyl acetate = 8:1), 1.86 g of white pure product was obtained, with a yield of 25.6%.
Embodiment 2
[0058] Embodiment 2: Preparation of brominated stilbene derivatives
[0059] Add 5.12g of pterostilbene, 1.38g of anhydrous potassium carbonate, and 100ml of acetone into a 250ml three-necked reaction flask, and heat to boiling. When the solution is clear, add 12ml of 1,4-dibromoethylbutane dropwise. Reflux reaction for 24h. The solution was suction filtered, and the filtrate was concentrated to obtain an oily product. After separation by silica gel column (100 g of 300-400 mesh silica gel) chromatography (eluent: petroleum ether: ethyl acetate = 8:1), 3.06 g of white pure product was obtained, with a yield of 39.1%.
Embodiment 3
[0060] Embodiment 3: Preparation of brominated stilbene derivatives
[0061] Add 2.56g of pterostilbene, 0.69g of anhydrous potassium carbonate, and 50ml of acetone into a 100ml three-necked reaction flask, heat to boiling, when the solution is clear, add 8ml of 1,6-dibromohexane dropwise, and reflux at 56°C 24h. Suction filtration, and the filtrate was concentrated to obtain an oily product. After separation by silica gel column (100 g of 300-400 mesh silica gel) chromatography (eluent: petroleum ether: ethyl acetate = 8:1), 2.90 g of white pure product was obtained, with a yield of 69.2%.
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