Method for synthesizing methyl cinnamate based on eutectic solvent catalyst
A technology of deep eutectic solvent and methyl cinnamate, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve problems such as corrosion equipment, large amount of alcohol, long reaction time, etc., to achieve The effects of mild reaction conditions, less corrosive equipment, and simple preparation methods
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Embodiment 1
[0017] Weigh 7.41g (0.05mol) of cinnamic acid and 6.40g (0.2mol) of methanol respectively, add the two into a three-necked flask, stir and heat to 64°C, then add 2.76g (20%) catalyst BTAC- PTSA and react at this temperature, the reaction time is 4 h; after the reaction, the reaction solution is separated into water and oil phases through a separatory funnel while it is hot, and the water phase is vacuum-dried at 50°C to recover the catalyst; the oil phase Pour it into a beaker while it is hot and place the beaker in a 40°C water bath, add an appropriate amount of 4% sodium carbonate solution to weak alkalinity (pH=7~8) under constant stirring, let stand to separate layers, and remove the water phase; Add three times the volume of 5°C deionized water to the oil phase under constant stirring to precipitate crystals, then suction filter and wash with deionized water until the filtrate is neutral to obtain a white or light yellow solid, and after drying, the target product methyl c...
Embodiment 2
[0019] Weigh 7.41g (0.05mol) of cinnamic acid and 4.81g (0.15mol) of methanol respectively, add the two into a three-necked flask, stir and heat to 76°C, then add 1.23g (10%) catalyst BTAC- PTSA was heated and refluxed at this temperature for 2 hours. After the reaction was completed, the reaction solution was separated into water and oil phases through a separatory funnel while it was still hot, and the water phase was vacuum-dried at 50°C to recover the catalyst; Pour the oil phase into a beaker while it is hot and place the beaker in a water bath at 50°C, add an appropriate amount of 4% sodium carbonate solution to weak alkalinity (pH=7~8) under constant stirring, let stand to separate layers, and remove water phase; the oil phase was added with three volumes of deionized water at 5°C under constant stirring to precipitate crystals, then suction filtered and washed with deionized water until the filtrate was neutral to obtain a white or light yellow solid, and after drying, ...
Embodiment 3
[0021] Weigh 7.41g (0.05mol) of cinnamic acid and 4.81g (0.15mol) of methanol respectively, add the two into a three-necked flask, stir and heat to 76°C, then add 3.66g (30%) catalyst BTAC- PTSA and heat reflux reaction at this temperature, the reaction time is 3h; after the reaction, the reaction solution is separated into water and oil phases through a separatory funnel while it is hot, and the water phase is vacuum-dried at 50°C to recover the catalyst; Pour the phase into a beaker while it is hot and place the beaker in a 45°C water bath, add an appropriate amount of 4% sodium carbonate solution to weakly alkaline (pH=7~8) under constant stirring, let it stand for layers, and remove the water phase Add three times the volume of 5°C deionized water to the oil phase under constant stirring to precipitate crystals, then suction filter and wash with deionized water until the filtrate is neutral to obtain a white or light yellow solid, and after drying, the target product methyl...
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