高速逆流色谱法分离制备丹酚酸B

采用高速逆流色谱法分离纯化丹参水溶性成分丹酚酸类物质,制备丹酚酸B化学对照品。分离采用的溶剂系统为正己烷-乙酸乙酯-水-甲醇(1.5:5:5:1.5),上相做固定相,下相做流动相,流速为1.7 mL/min,仪器转速850 rpm,进样量80 mg,纯度用HPLC方法测定。结果表明:一次分离可制备63.4 mg丹酚酸B,其纯度为98.6%。该方法操作简单,可作为高纯度丹酚酸B化学对照品的制备分离方法。     

高速逆流色谱制备玫瑰红景天中的三种酚性化合物

采用高速逆流色谱方法(HSCCC,High-speed Counter-current Chromatography)同时分离三种玫瑰红景天酚性化合物。玫瑰红景天提取物经聚酰胺吸附多酚后经硅胶柱分级得预分离样品,采用正己烷∶乙酸乙酯∶甲醇∶水(4∶5∶4∶5,v/v/v/v)组成的两相溶剂系统对预分离样品进行分离纯化,一次进样150 mg,一次色谱分离得到化合物1:68.5 mg、化合物2:8.5 mg、化合物3:45.5 mg,纯度都超过98%。通过ESI-MS、1H NMR对其结构进行鉴定化合物1为没食子酸(Gallic acid),化合物2为没食子酸甲酯(Methyl gallate),化合物3为山奈酚(Kaempferol)。结果表明利用HSCCC可以成功分离三种酚性化合物,分离效果好,产品纯度高。     

高速逆流色谱法分离制备花生壳中的黄酮类化合物

应用高速逆流色谱法首次从花生壳中分离制备了3种黄酮类化合物。以正己烷-乙酸乙酯-甲醇-水-冰醋酸(5:3:3.5:5:0.25,v/v)为两相溶剂系统,在主机转速800 r/min、流速2 mL/min、检测波长275 nm条件下进行分离制备,纯度用HPLC法测定,各化合物结构经质谱和核磁共振氢谱、碳谱鉴定。结果表明,100 min内从70 mg花生壳粗提物中一步分离制备得到木犀草素11.0 mg,香叶木素2.2 mg,5,7-二羟基色原酮5.2 mg,其纯度均达96.0%以上。利用该方法可以对花生壳中的黄酮类化合物进行快速的分离和纯化。     

高速逆流色谱技术分离纯化红葱中的萘醌类化合物

采用高速逆流色谱(HSCCC)技术从红葱中快速分离纯化得到红葱乙素和异红葱乙素,建立了快速分离制备红葱中萘酚类化合物的方法。首先采用95%乙醇加热回流提取得红葱提取物,再用乙酸乙酯萃取富集萘醌类成分,然后用高速逆流色谱分离纯化,以石油醚-乙酸乙酯-甲醇-水(6∶4∶5∶5,v/v)组成二元溶剂系统,上相为固定相,下相为流动相,仪器转速为850 rpm,流速为2.0 m L/min,检测波长为254 nm。从200 mg富集萘醌类成分的粗提物中,一次性分离制备得到60 mg异红葱乙素和49 mg红葱乙素,经高效液相色谱法(HPLC)分析,其纯度分别为97.3%和98.6%。通过核磁共振氢谱(~1H NMR)和核磁共振碳谱(~(13)C NMR)鉴定化合物为红葱乙素和异红葱乙素。研究结果表明,该方法快速、高效,适用于红葱中萘酚类化合物的分离纯化。     

高速逆流色谱分离真菌Aspergullus versicolor中二苯醚类化合物

首次运用高速逆流色谱(HSCCC)技术从经表观遗传试剂诱导的曲霉属真菌Aspergullus versicolor的次级代谢产物中快速分离纯化得到二苯醚类化合物diorcinol,建立了快速分离制备杂色曲霉次级代谢产物中的二苯醚类化合物的方法。本研究首先对经过表观遗传试剂诱导的菌株DJ013的发酵液用乙酸乙酯浸提,萃取富集二苯醚类成分,然后以石油醚-乙酸乙酯-甲醇-水(4∶5∶4∶5,v/v)为两相溶剂系统进行高速逆流色谱分离纯化,上相为固定相,下相为流动相,流速5.0 m L/min,实验温度25℃,转速为800 rpm,检测波长为220 nm。对所得到的目标化合物经超高效液相色谱(UPLC)纯度分析,其纯度在97%以上。通过质谱、核磁等波谱技术鉴定所分离得到的目标化合物为二苯醚类化合物diorcinol。与前期研究中采用的柱色谱法、HPLC等多种方法相结合的长达48 h的制备周期相比,高速逆流色谱法仅需55 min,效率大大提高。该结果表明,本研究建立的高速逆流色谱方法可高效高纯度获得具有抗菌活性的二苯醚类化合物,将为二苯醚化合物的进一步研究提供高效制备方法。     

pH区带精制逆流色谱法分离制备黄藤中巴马汀和药根碱

建立了黄藤生物碱快速分离制备的pH区带精制逆流色谱方法。采用95%乙醇加热回流提取制备黄藤生物碱粗提物,利用pH区带精制逆流色谱法对生物碱粗提物进行直接分离制备,以氯仿-甲醇-水(4∶3∶3)为溶剂系统,下相添加三乙胺(10 mmol/L)为流动相,上相加盐酸(40 mmol/L)作为固定相,在主机转速800 rpm,流动相流速2 m L/min,检测波长254 nm条件下进行分离制备。从1.5 g黄藤提取物中一次分离得到231.6 mg药根碱和436.8 mg巴马汀,纯度均大于98%。化合物通过MS、~1H NMR和~(13)C NMR进行了结构鉴定。pH区带精制逆流色谱法是一种快速高效的分离纯化黄藤生物碱的方法。     

酸水解结合高速逆流色谱分离制备高纯度牛蒡子苷元

建立酸水解结合高速逆流色谱法从牛蒡子中快速分离制备高纯度牛蒡子苷元的方法。采用醇提酸解法提取,再经氯仿萃取得牛蒡子粗提物;以石油醚-乙酸乙酯-甲醇-水(2∶5∶3∶4,v/v)作为两相溶剂系统,在流速10 m L/min、转速850 rpm、检测波长280 nm下实现对牛蒡子苷元的快速分离制备。80 min内从连续两次进样的1200 mg牛蒡子粗提物中分离得到牛蒡子苷元318 mg,其纯度达99.12%,得率达26.5%。该方法简便、快速、高效,可用于牛蒡子苷元的快速分离制备,为牛蒡子的开发利用提供了参考依据。     

高速逆流色谱分离制备甘草中的甘草苷和芒柄花苷

应用高速逆流色谱分离制备甘草中的甘草苷和芒柄花苷。将甘草乙酸乙酯提取物经聚酰胺柱粗分后,30%乙醇洗脱物用高速逆流色谱进一步分离,所用两相溶剂系统为乙酸乙酯-水(5∶5,v/v),转速850 rpm,流速2.0 mL/min,检测波长254 nm,从50 mg30%乙醇洗脱物中得到甘草苷8.7 mg、芒柄花苷4.2 mg,纯度分别为99.5%和97.3%。所得产物的结构经核磁共振谱(NMR)鉴定。利用该方法可以对甘草中的甘草苷和芒柄花苷进行快速的分离和纯化。     

聚酰胺色谱结合高速逆流色谱分离制备萹蓄黄酮类化合物

采用聚酰胺色谱结合高速逆流色谱法分离纯化了萹蓄中3种黄酮类化合物,建立了快速分离制备萹蓄中3种黄酮类化合物的方法。通过聚酰胺柱色谱富集黄酮类成分,再经过高速逆流色谱分离,以乙酸乙酯-甲醇-水-甲酸(体积比为4∶1∶5∶0.1)组成的二相系统作为固定相与流动相,在主机转速为850 rpm,流速为2.0m L/min,检测波长为254 nm的条件下制备样品。从150 mg富集黄酮成分的馏分中,一次性分离制备得到纯度为94.86%的杨梅树皮苷(myricitrin)7.5 mg,94.28%的黄芪苷(astragalin)13.8 mg,91.86%的合欢草素1(desmanthin-1)20.6 mg。所得馏分经高效液相色谱法(HPLC)检测纯度,并经MS和NMR鉴定化合物的结构。该方法简便、快速,所得产物纯度高,适合于黄酮类化合物的制备分离。     

高速逆流色谱法分离纯化茶黄素

首次应用高速逆流色谱法分离纯化茶黄素单体成分,溶剂系统为乙酸乙酯－正己烷－甲醇－水（３：１：１：６）,优化了分离茶黄素的条件。同时与ＳｅｐｈａｄｅｘＬＨ－２０柱色谱法梯度洗脱对比,结果表明,高速逆流色谱法分离时间相对较短,可进行较大量的分离制备。高速逆流色谱法较之ＳｅｐｈａｄｅｘＬＨ－２０柱色谱法还有一个突出的优点,即无不可逆吸附污染及不会导致样品化学变性。     

The isolation of 1,2,3,4,6-penta-O-galloyl-beta-D-glucose from Acer truncatum Bunge by high-speed counter-current chromatography

High-speed counter-current chromatography (HSCCC) was successfully used for the isolation and purification of 1,2,3,4,6-penta-O-galloyl-beta-D-glucose from the ethyl acetate extract of the leaves of Acer truncatum Bunge using a two-phase system composed of n-hexane-ethyl acetate-methanol-water at a volume ratio of (0.25:5:1:5, v/v/v/v) for the first time. Each injection of 80 mg crude extract yielded 7.25 mg of pure 1,2,3,4,6-penta-O-galloyl-beta-D-glucose. High-performance liquid chromatography (HPLC) analyses of the CCC fraction revealed that the purity of 1,2,3,4,6-penta-O-galloyl-beta-D- glucose was over 95%.     

Preparative isolation and purification of harpagoside from Scrophularia ningpoensis hemsley by high-speed counter-current chromatography

The bioactive component harpagoside was successfully separated from the crude extract of Scrophularia ningpoensis Hemsley by one-step purification using high-speed counter-current chromatography (HSCCC). A two-phase solvent system containing n-butanol:ethyl acetate:water (1:9:10) was selected following consideration of the partition coefficient of the target compound. A 276 mg quantity of the crude extract was loaded onto a 250 mL HSCCC column and yielded 11 mg harpagoside at over 97% purity. The chemical structure of harpagoside was determined by HPLC-ESI/MS and 1H-NMR.     

Application of analytical and preparative high-speed counter-current chromatography for the separation of Z-ligustilide from a crude extract of Angelica sinensis

Z-Ligustilide was separated and purified from the traditional Chinese medicinal plant Angelica sinensis by high-speed counter-current chromatography (HSCCC). Analytical HSCCC was first used for the systematic selection of the two-phase solvent system. Preparative HSCCC separation was performed with a two-phase solvent system composed of petroleum ether (60-90 degrees C)-ethanol-water at an optimum volume ratio of 10:17:10 (v/v). A total of 38 mg Z-ligustilide at 98.8% purity was obtained in one step from 200 mg crude extract as determined by HPLC analysis. The structure of the target compound was identified by electron impact ionisation mass spectrometry.     

Application of microwave‐assisted extraction coupled with high‐speed counter‐current chromatography for separation and purification of Dehydrocavidine from Corydalis saxicola Bunting

Introduction – Dehydrocavidine is a major component of Corydalis saxicola Bunting with sedative, analgesic, anticonvulsive and antibacterial activities. Conventional methods have disadvantages in extracting, separating and purifying dehydrocavidine from C. saxicola. Hence, an efficient method should be established. Objective – To develop a suitable preparative method in order to isolate dehydrocavidine from a complex C. saxicola extract by preparative HSCCC. Methodology – The methanol extract of C. saxicola was prepared by optimised microwave‐assisted extraction (MAE). The analytical HSCCC was used for the exploration of suitable solvent systems and the preparative HSCCC was used for larger scale separation and purification. Dehydrocavidine was analysed by high‐performance liquid chromatography (HPLC) and further identified by ESI‐MS and 1H NMR. Results – The optimised MAE experimental conditions were as follows: extraction temperature, 60°C; ratio of liquid to solid, 20; extraction time, 15 min; and microwave power, 700 W. In less than 4 h, 42.1 mg of dehydrocavidine (98.9% purity) was obtained from 900 mg crude extract in a one‐step separation, using a two‐phase solvent system composed of chloroform–methanol–0.3 m hydrochloric acid (4 : 0.5 : 2, v/v/v). Conclusion – Microwave‐assisted extraction coupled with high‐speed counter‐current chromatography is a powerful tool for extraction, separation and purification of dehydrocavidine from C. saxicola. Copyright © 2009 John Wiley & Sons, Ltd.     

Two-step purification of scutellarin from Erigeron breviscapus (vant.) Hand. Mazz. by high-speed counter-current chromatography

Scutellarin, a flavone glycoside, popularly applied for the treatment of cardiopathy, has been purified in two-step purification by high-speed counter-current chromatography (HSCCC) from Erigeron breviscapus (vant.) Hand. Mazz. (Deng-zhan-hua in Chinese), a well-known traditional Chinese medicinal plant for heart disease. Two solvent systems, n-hexane-ethyl acetate-methanol-acetic acid-water (1:6:1.5:1:4, v/v/v/v/v) and ethyl acetate-n-butanol-acetonitrile-0.1% HCl (5:2:5:10, v/v/v/v) were used for the two-step purification. The purity of the collected fraction of scutellarin was 95.6%. This study supplies a new alternative method for purification of scutellarin.     

Preparative separation of helvolic acid from the endophytic fungus <Emphasis Type="Italic">Pichia guilliermondii</Emphasis> Ppf9 by high-speed counter-current chromatography

High-speed counter-current chromatography (HSCCC) was applied for preparative separation of helvolic acid from the crude extract of the endophytic fungus Pichia guilliermondii Ppf9, associated with the medicinal plant Paris polyphylla var. yunnanensis for the first time. The two-phase solvent system consisted of n-hexane-ethyl acetate-methanol-water (4.5:4.5:5.0:5.0, v/v) appending with phosphoric acid (0.2%, v/v) was employed. The revolution speed of the separation column, flow rate of the mobile phase and separation temperature of the apparatus were 800 rpm, 3 ml min(-1) and 25°C, respectively. About 6.8 mg of helvolic acid was successfully obtained from 450 mg of the crude extract by HSCCC within 4 h separation procedure, and its purity reached to 93.2% according to the HPLC analysis. The product was further characterized by MS, (1)H-NMR and (13)C-NMR spectra.     

应用高速逆流色谱分离桑枝酚类成分

建立了高速逆流色谱(HsCCC)分离制备高纯度的桑枝酚类成分的新方法.分离条件如下:溶剂系统为正己烷-乙酸乙酯-甲醇冰(1∶1∶1∶2,v/v),上相为固定相,下相为流动相;流速2.0 mL/min;转速900rpm;进样量75 mg.收集得到三个高纯度化合物,经HPLC、MS、1H和13C NMR等分别鉴定为反式氧化白藜芦醇(25.2mg),反式白藜芦醇(7.4 mg)和桑辛素M(29.1 mg).高速逆流色谱可以高效分离桑枝成分,方法简便,技术可行,优于传统的柱色谱法.     

HSCCC-ELSD法分离纯化青葙子中的皂苷

连接有蒸发光散射检测器的高速逆流色谱仪首次成功的应用于制备和分离青葙子中的皂苷celosins A和B.二氯甲烷∶正丁醇∶甲醇∶水(4∶0.3∶3∶2)+0.5％冰醋酸作为洗脱溶剂系统.从半制备型HSCCC收集到的组分进行HPLC分析,可以得到:celosin A纯度为98.9％,celosin B的纯度为98.1％.这是高速逆流色谱仪首次被用于纯化青葙子中的皂苷,两个化合物的结构通过碳谱和质谱来确定.