From the herbal medicine Herba Lycopodii serrati, extract the method for selagine
(1) technical field
The present invention relates to a kind of traditional Chinese medicine extraction method, relate in particular to a kind of method of from the herbal medicine Herba Lycopodii serrati, extracting selagine.
(2) background technology
The herbal medicine Herba Lycopodii serrati is the herb of pteridophyte Huperziaceae Herba Lycopodii serrati, another name is many because the place of production spreads all over China from reaching the mountain area in north in the south, and the place of production is wide, and another name has feet added to a snake by an ignorant artist grass, Herba pteridis vittatae etc., be perennial herb, be applied to loose stasis of blood blood, swelling and pain relieving, dehumidifying, clearing heat and detoxicating among the people.Its main chemical compositions: selagine, second, the peaceful alkali of Herba Lycopodii serrati, Herba Lycopodii serrati are decided alkaloidss such as alkali, its peaceful alkali of Herba Lycopodii serrati.
Selagine is being used for the treatment of and prevention degenerative brain disorder and the medicine for the treatment of benign memory deficits of China's original creation, is the chemical monomer of extraction separation from the herbal medicine Herba Lycopodii serrati, is a kind of potent reversibility acetylcholinesterase depressant.The man memory function is mainly by the neurotransmitter of a kind of vagusstoff in the brain, can promote maintenance and the consolidation remembered when its increased activity, during minimizing then hypomnesis so that lose.The acetylcholinesterase that exists in human body can decompose vagusstoff, it is reduced in human brain and produces hypomnesis and dementia.Selagine is the inhibitor of acetylcholinesterase, can reduce the Pseudocholinesterase in the brain.
Through clinical verification, after person in middle and old age poor memory person took medicine one month, people's memory of 74-86.6% significantly strengthened, 58-61% slightly to moderate senile dementia patient take medicine one to two month after, not only strengthen memory, improved cognition, and improved the ability of self-cooking life.
Acetylcholinesterase depressant commonly used has his Kelin of selagine sheet that selagine makes and foreign production and sales, and his Kelin is chemosynthesis, and tangible hepatotoxicity is arranged, simultaneously the transformation period of this product short, the clothes after effect time is lacked, and is on the high side.And selagine is to extract from the herbal medicine Herba Lycopodii serrati, easily absorb, and no obvious toxic-side effects, long action time easily sees through hemato encephalic barrier, moderate cost.Since this medicine listing, receive the concern of domestic and international the world of medicine, be incorporated into " world's medicine guide " in the world, had domestic greatly, world market potentiality.
At present, from the herbal medicine Herba Lycopodii serrati, extract selagine, domestic employing laboratory scale is extracted, its main technique step is: raw material is handled (select, pulverize) → dipping (sour water immersion) → concentrated → extraction → column chromatography → refining (employing recrystallization method) etc., yield is low, only reaches 5/100000ths, and purity is below 95%, industrial scale is little, can not meet the need of market.Therefore, the insider seeks new extracting method in research.
(3) summary of the invention
Problems such as purpose of the present invention is low at existing yield in the above-mentioned prior art just, purity is low and a kind of new processing method of from Herba Lycopodii serrati, extracting selagine developed.
The objective of the invention is to realize by following scheme:
Method of the present invention comprises following processing step successively: (1), dipping: the raw material Herba Lycopodii serrati is pulverized the back soaked 38~60 hours tapping 3~6 times with the organic acid dynamic circulation in jar; (2), concentrate: percolate is put into vacuum concentration pot, and 50 ℃~65 ℃ vacuum decompressions are concentrated into 1~10% of original volume; (3), extraction: concentrated solution is transferred pH value to 8~9.5 with sodium hydroxide or potassium hydroxide, chloroform extraction 4~6 times, with the extraction of 0.05~0.2% sodium hydroxide solution, the chloroform solution of obtaining is put into the alkali lye basin again, alkali lye input extraction liquid basin, use chloroform extraction again 2~3 times, the combined chloroform extraction liquid is gone into reclaim under reduced pressure device, concentrating under reduced pressure, vacuum tightness 600~750mmHg, chloroform vapor is recycled to medicinal extract with-0.3~10 ℃ of cool brine coolings with extraction liquid, emits chloroform and goes into basin; (4), column chromatography: will admix silica gel after the medicinal extract oven dry processing, wet method dress post avoids occurring bubble, carries out gradient elution with the chloroform-methanol elutriant of preparing, and with each stream part of thin layer chromatography inspection, collects the high stream part of content; (5), crystallization: high component elutriant is put and is left standstill 10~20 days in the freezer, temperature-0.3~-15 ℃, after precipitation is separated out, the sucking-off supernatant liquor, suction filtration, drying under reduced pressure gets crude product; Wherein: the raw material Herba Lycopodii serrati is the powder through micronizing; The crude product of crystallization gained separates purification (this be the present invention tool characteristics part) with the preparative high performance liquid chromatography instrument, adopts the 150mm silicagel column, use the eluent wash-out, collection selagine section; Selagine liquid is concentrated into 1/2~1/5 of original volume with thinfilm rotary evaporator, concentrated solution is delivered to lyophilize in the vacuum refrigerating machine, get the selagine finished product.
In invention, used eluent can be normal hexane-acetone-ethanol, ratio 1.5~3: 2~4.5: 0.05~0.15; Also be chloroform-methanol, ratio 85~99: 15~1; Eluent also can be methylene dichloride-acetone, ratio 1~5: 1.
The present invention's used organic acid when soaking can be tartrate, also can be oxysuccinic acid.
From extraction process of the present invention and existing extraction process more as can be known, because the pulverizing of existing raw material Herba Lycopodii serrati is to adopt general breaking method, with pulverizing medicinal materials is that meal carries out diacolation, the selagine stripping is incomplete, yield is lower, and the present invention then adopts the super-fine powder crushing technology, can be with the vegetable cell fragmentation, thereby make the selagine stripping more thorough, therefore yield is improved; Moreover, prior art is to adopt recrystallization method to separate, contained another kind of alkaloid---huperzine B is similar to the selagine chemical structure because in the Herba Lycopodii serrati, and the biological activity of huperzine B is very low, adopt the method for recrystallization to be difficult to the two separation, thereby cause yield low, purity is also low, the present invention adopts the high performance liquid chromatography selections to separate, and advantage is by spectral detection, and is different with the retention time of selagine according to stone shirt alkali second, the two can be separated fully, thereby huperzine B is removed, can be made purity reach 98% like this, actual purity can reach more than 99%.
The present invention compared with prior art, its advantage is: can make yield reach 7/100000ths to nine, improve yield 30%, purity also is improved, and produces and can reach industrialized scale, the quality product height, it is strong to enter competitiveness in the international market.
(4) specific embodiments
The present invention is described further below in conjunction with embodiment, but does not limit the present invention.
The technical process that the present invention extracts selagine is: raw material is handled pulverizing → dipping → concentrated → extraction (repeatedly) → column chromatography → crystallization → high performance liquid chromatography selections → concentrate drying → finished product.
Embodiment 1
The method steps of present embodiment extraction selagine is as follows:
(1), get the raw materials ready: raw material is selected, segment, pulverizing, meal, pulverize through super-fine powder again;
(2), dipping: the raw material Herba Lycopodii serrati is pulverized the back in the diacolation jar, soaked 45 hours, every tapping in 10 hours 1 time with the tartrate dynamic circulation;
(3), concentrate: percolate is put into vacuum concentration pot, and 55 ℃ of vacuum decompressions are concentrated into original volume 8%;
(4), extraction: concentrated solution is transferred about pH value to 8.5 with sodium hydroxide, chloroform extraction 4 times, with the extraction of 0.1% sodium hydroxide solution, the chloroform solution of obtaining is put into the alkali lye basin again, alkali lye input extraction liquid basin, use chloroform extraction again 2 times, chloroform extraction liquid is gone into reclaim under reduced pressure device, concentrating under reduced pressure, about vacuum tightness 650mmHg, chloroform vapor cools off with 1 ℃ of cool brine, and extraction liquid is recycled to medicinal extract, emits chloroform and goes into basin;
(5), column chromatography: will medicinal extract admix silica gel after the oven dry, wet method dress post avoids occurring bubble, carries out gradient elution with the chloroform-methanol elutriant of preparation, with each stream of thin layer chromatography inspection part, the high stream part of collection content;
(6), crystallization: high component elutriant is put and is left standstill 12 days in the freezer, temperature-5 ℃, after precipitation is separated out, the sucking-off supernatant liquor, suction filtration, drying under reduced pressure gets crude product;
(7), crude product is separated purification (this be the present invention tool characteristics part) with the preparative high performance liquid chromatography instrument, adopt the 150mm silicagel column, eluent is normal hexane-acetone-ethanol, ratio 1.5-3: 2-4.5: 0.05-0.15, collect the selagine section;
(8), selagine liquid is concentrated into about 1/3 of original volume with thinfilm rotary evaporator, concentrated solution is delivered to lyophilize in the vacuum refrigerating machine, the selagine finished product.
Embodiment 2
The method steps of present embodiment extraction selagine is as follows:
(1), get the raw materials ready: raw material is selected, segment, pulverizing, meal, super-fine powder is pulverized again;
(2), dipping: the raw material Herba Lycopodii serrati is pulverized the back in the diacolation jar, soaked 60 hours, every tapping in 10 hours 1 time with the oxysuccinic acid dynamic circulation;
(3), concentrate: percolate is put into vacuum concentration pot, and 65 ℃ of vacuum decompressions are concentrated into original volume 10%;
(4), extraction: concentrated solution is transferred pH value to 9.5 with sodium hydroxide, chloroform extraction 6 times, with the extraction of 0.2% sodium hydroxide solution, the chloroform solution of obtaining is put into the alkali lye basin again, alkali lye input extraction liquid basin, use chloroform extraction again 3 times, chloroform extraction liquid is gone into reclaim under reduced pressure device, concentrating under reduced pressure, vacuum tightness 750mmHg, chloroform vapor cools off with 5 ℃ of cool brines, and extraction liquid is recycled to medicinal extract, emits chloroform and goes into basin;
(5), column chromatography: will medicinal extract admix silica gel after the oven dry, wet method dress post avoids occurring bubble, carries out gradient elution with the chloroform-methanol elutriant of preparation, with each stream of thin layer chromatography inspection part, the high stream part of collection content;
(6), crystallization: high component elutriant is put and is left standstill 18 days in the freezer, temperature-10 ℃, after precipitation is separated out, the sucking-off supernatant liquor, suction filtration, drying under reduced pressure gets crude product;
(7), crude product is separated purification (this be the present invention tool characteristics part) with the preparative high performance liquid chromatography instrument, adopt the 150mm silicagel column, eluent is normal hexane-acetone-ethanol, ratio 1.5-3: 2-4.5: 0.05-0.15, collect the selagine section;
(8), selagine liquid is concentrated into 1/4 of original volume with thinfilm rotary evaporator, concentrated solution is delivered to lyophilize in the vacuum refrigerating machine, the selagine finished product.
Equipment used in the present invention is the used general-purpose equipment of chemical pharmaceutical industry, as: soak jar, the energy-conservation concentration tank of triple effect, single-action concentration tank, import continuous extraction machine, chromatography column, high-efficient liquid phase color spectrometer, preparative high performance liquid chromatography instrument etc.