Method for preparing ethyl oleate from Lauraceae plants
A technology of ethyl oleate and Lauraceae, applied in the technical preparation field of the agricultural field, can solve the problems such as not preparing ethyl oleate, and achieve the effects of easy large-scale industrial production, wide sources and high economic benefits
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Embodiment 1
[0026] After washing and drying the Lauraceae plants, dry them at 50°C, crush them and pass through a 50-mesh sieve, weigh 100g of powder, soak in absolute ethanol with 40 times the weight of the powder at room temperature for 72h, filter, and reduce the filtrate at 42°C. Concentrate under reduced pressure to obtain 21.1 g of the concentrate, then dissolve the concentrate with 200 ml of deionized water, then extract 3 times with an equal volume of petroleum ether, concentrate the petroleum ether phase obtained from the extraction under reduced pressure, and use a 200-300 mesh silica gel column. Gradient elution was carried out by using the petroleum ether-ethyl acetate system as the mobile phase and increasing the proportion of ethyl acetate. The target product was collected by TLC detection, the components containing the target substance were collected, concentrated and the solvent was evaporated to dryness, and then the obtained concentrate was further purified through a gel ...
Embodiment 2
[0028] After washing and drying the Lauraceae plants, dry them at 40°C, pass through a 30-mesh sieve after crushing, weigh 200g of powder, soak in absolute ethanol with 5 times the powder mass at room temperature for 24h, filter, and reduce the filtrate at 40°C. Concentrate under reduced pressure to obtain 25.1 g of the concentrate, then dissolve the concentrate with 500 ml of deionized water, then extract 3 times with 3 times the volume of ethyl acetate, concentrate the extracted ethyl acetate phase under reduced pressure, and use a 200-300 mesh Silica gel column, use cyclohexane-ethyl acetate system as the mobile phase to increase the ratio of ethyl acetate for gradient elution (for example, use ratios of 200:1, 180:1, 140:1, 120:1, 100:1, 80:1, 60:1, 40 :1, 20:1, 10:1, 5:1, 2:1, 1:1; of course, other ratios can also be used in other embodiments, which can be determined according to general principles and actual conditions). The target product was collected by TLC detection,...
Embodiment 3
[0030] After washing and drying the Lauraceae plants, dry them at 45°C, crush them and pass them through a 10-mesh sieve, weigh 100g of powder, soak them in absolute ethanol with 20 times the weight of the powder at room temperature for 48h, filter, and reduce the filtrate at 40°C. Concentrate under reduced pressure to obtain 16.1 g of the concentrate, then dissolve the concentrate with 20 ml of deionized water, then extract 3 times with 5 times the volume of petroleum ether, concentrate the petroleum ether phase obtained by extraction under reduced pressure, and use a 200-300 mesh silica gel column , using the cyclohexane-ethyl acetate system as the mobile phase to increase the proportion of ethyl acetate for gradient elution. The target product was collected by TLC detection, the components containing the target substance were collected, concentrated and the solvent was evaporated to dryness, and then the obtained concentrate was further purified through a gel column Sephadex...
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