Method for preparing veratric acid from trollius chinensis bunge
A technology of nasturtium and veratronic acid, applied in the field of preparation of veratronic acid, can solve the problems of unreported yield and cumbersome steps
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Embodiment 1
[0012] Take 10g of nasturtium herb, add 15 times the amount (v / w) of ethyl acetate, reflux extraction in a 90°C water bath for 2h, concentrate the extract to 20ml, add 10g of polyamide powder to mix the sample. After the mixture was evaporated to dryness under reduced pressure, it was put into a Buchner funnel, and 200ml of 20% ethanol was added to filter it with suction. After the filtrate was concentrated to dryness, repeated recrystallization with petroleum ether-acetone gave 23 mg of veratronic acid with a purity of 98.2%.
Embodiment 2
[0014] Take 10g of nasturtium herb, add 10 times the amount (v / w) of ethyl acetate, reflux extraction on a 90°C water bath for 2h, concentrate the extract to 20ml, add 10g of polyamide to mix the sample. After the mixture was evaporated to dryness under reduced pressure, it was put into a Buchner funnel, and 200ml of 20% ethanol was added to filter it with suction. After the filtrate was concentrated to dryness, repeated recrystallization with petroleum ether-acetone gave 18 mg of veratronic acid with a purity of 98.5%.
Embodiment 3
[0016] Take 10 g of nasturtium herb, add 20 times the amount (v / w) of ethyl acetate, reflux extraction on a 90°C water bath for 2 hours, concentrate the extract to 20 ml, add 10 g of polyamide to mix the sample. After the mixture was evaporated to dryness under reduced pressure, it was put into a Buchner funnel, and 200ml of 20% ethanol was added to filter it with suction. After the filtrate was concentrated to dryness, repeated recrystallization with petroleum ether-acetone gave 25 mg of veratronic acid with a purity of 97.9%.
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