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Process for preparing protopanoxadiol and protopanaxatriol

A technology of protopanaxatriol and protopanaxadiol, which is applied in the direction of steroids and organic chemistry, can solve the problem of low yield, achieve low cost, satisfy anti-tumor effects, and mild reaction conditions

Active Publication Date: 2005-01-26
怡瑞达(上海)医药科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This method needs to be carried out under high temperature, and also mostly mixed saponins are obtained after hydrolysis, so the yield of target product protopanaxadiol and protopanaxatriol monomer is not high

Method used

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  • Process for preparing protopanoxadiol and protopanaxatriol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 18kg of Panax notoginseng (specification: countless heads, purchased from Yunnan) is crushed into powder (100-200 mesh), soaked in 30kg of 95% ethanol for two days, filtered, the filtrate is concentrated to obtain Panax notoginseng ethanol extract, and the ethanol is recovered and reused to soak the filter residue Six times, finally accumulatively obtained 3.37kg of Panax notoginseng ethanol extract, dissolved it in water, extracted three times with petroleum ether, took the water phase and extracted four times with n-butanol, concentrated the n-butanol layer, and obtained Panax notoginseng total saponins n-butyl Alcoholic extract 1.78kg.

[0027] Get total saponin extract 100g and dissolve in 1300ml n-butanol, heat, stir, add sodium ethylate (chemically pure, purity: 80%) 132.6g (1.56mol, concentration: 1.2mol / L), feed oxygen, 90 ℃ react After 65 hours, the reaction was over. The reaction solution was cooled to room temperature, washed with water saturated with n-buta...

Embodiment 2

[0032]Get 100g of Panax notoginseng total saponins extract (prepared in Example 1) and dissolve in 1500ml n-amyl alcohol, heat, stir, add sodium n-butoxide (chemically pure, purity: 80%) 150g (1.56mol, concentration: 1.04 mol / L), pass compressed air, react at 100°C for 60 hours, and the reaction ends. The reaction solution was cooled to room temperature, washed with water saturated with n-butanol, the n-butanol layer was concentrated and dissolved in water, extracted with ethyl acetate, the ethyl acetate layer was washed with water, and dried. After concentration, it was purified by silica gel column chromatography [cyclohexane:ethyl acetate=10:1-1:1 (V / V) gradient elution] to obtain 8 g of protopanaxadiol (A2), with a purity of 97% as determined by HPLC. %; protopanaxatriol (A3) 15g, HPLC assay purity is 99%. The measured physicochemical data of compound (A3) is consistent with the literature value: Chen Yingjie et al, Journal of Shenyang College of Pharmacy, 1987, 4(4), 282...

Embodiment 3

[0034] Notoginsenoside (content: calculated as ginsenoside Rb3, 91.9%; purchased from Yunnan) 1000g was dissolved in 14L n-butanol, heated, stirred, and sodium ethylate (chemically pure, purity: 80%) 1190g (14.0mol, Concentration: 1.0mol / L), pass oxygen, react at 110°C for 55 hours, and the reaction ends. The reaction solution was cooled to room temperature, washed with water saturated with n-butanol, the n-butanol layer was concentrated and dissolved in water, extracted with ethyl acetate, and the ethyl acetate extract was washed with water, dried, and evaporated to dryness. After purification by silica gel column chromatography [petroleum ether: ethyl acetate = 9:1-2:1 (V / V) gradient elution], 181.6 g of protopanaxadiol (A2) was obtained, and the purity determined by HPLC was 99.3%. Its physicochemical data are consistent with literature values: J. Asakawa et al, Tetrahedron, 1977, 33, 1935-939; Nagai, M. et al, Chem. Pharm. Bull, 1972, 20(6), 1212-1216.

[0035] The physic...

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Abstract

The invention relates to the process for preparing protopanoxadiol and protopanaxatriol by using general saponin extract from panax ginseng plant leaves and gynostemma pentaphylla extractive as raw material for alkaline hydrolysis reaction in organic solvent through column chromatography and purification.

Description

technical field [0001] The present invention relates to a preparation method of protopanaxadiol and protopanaxatriol, in particular to using the total saponin extract of plants of the genus Panax or leaves containing ginsenosides and the extract of Gynostemma pentaphyllum of plants of the genus Gynostemma as raw materials, through oxidative alkali hydrolysis A method for preparing protopanaxadiol and protopanaxatriol. Background technique [0002] Araliaceae (Araliaceae) plants of the genus Panax have high medicinal value, and their main active ingredients are saponins, which can be roughly divided into three categories according to the structure of aglycones: Protopanaxdiol saponins (Protopanaxdiol saponins) -type Gisenosides), protopanaxtriol-type Gisnosides (Protopanaxtriol-type Gisnosides) and oleanolic acid saponins. The medicinal plants of this genus have the following: the first type of plants, the saponins include protopanaxadiol saponins and protopanaxatriol saponi...

Claims

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Application Information

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IPC IPC(8): C07J9/00
Inventor 惠永正刘俊耀杨志奇滕继军
Owner 怡瑞达(上海)医药科技有限公司
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