CN114634537A - 金叶子二萜的制备方法及其应用 - Google Patents
金叶子二萜的制备方法及其应用 Download PDFInfo
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Abstract
本发明公开了一种金叶子中二萜的制备方法及其应用,该类二萜主要为木藜芦毒烷和贝壳杉烷及其衍生物。以含水醇为溶剂对金叶子进行提取,将提取液用串联大孔树脂法进行分离纯化,再经干燥处理后得到金叶子二萜。金叶子二萜经多种色谱得到单体化合物。本发明的制备工艺能有效去除糖类、黄酮类及色素等杂质,得到纯度较高的二萜类成分。工艺过程简单、可控、适合工业化生产。本发明同时公开了金叶子二萜总提取物及单体化合物的镇痛作用。
Description
技术领域
本发明属于中药提取物制备工艺领域,涉及从金叶子中制备木藜芦烷型二萜的工艺,该二萜类成分具有镇痛的作用。
背景技术
金叶子(Craibiodendron yunnanense W.W.Smith)为杜鹃花科常绿小乔木。分布于广西、云南、西藏,主产于云南。金叶子涩,微辛,性温,有剧毒。有发表温经,活络止痛之功效,临床可用于治疗跌打损伤,风湿麻木,外感风寒,也可治骨折,瘫痪和胃痛。
金叶子中含有多种化学成分,主要为黄酮和二萜类成分,其中木藜芦毒烷型四环二萜类成分为主要的活性成分。目前,尚无关于金叶子二萜类成分制备工艺及应用的相关报道,本研究的工艺路线可除去金叶子二萜中的大部分杂质,特别是多糖和黄酮类杂质,得到纯度较高的二萜类总样,同时还可制备得到单体化合物,对于金叶子二萜开发为镇痛类中药新药具有重要的意义。
发明内容
本发明的目的是提供来源于杜鹃科植物金叶子中二萜类总提物及单体成分的制备方法。本发明的另一个目的是提供此类成分在镇痛方面的应用。
金叶子二萜类化合物为木藜芦毒烷或贝壳杉烷及其衍生物或其它类型的二萜。
所述的木藜芦毒烷衍生物,其特征在于具有如下结构式:
R1、R2、R3、R4、R5、R6、R7、R8=葡萄糖基、羟基、氢或OCO(CH2)n CH3
或可选择的C10和C20,C15和C16形成双键;
或C2和C3,C6和C10,C7和C10形成氧桥。
所述的贝壳杉烷衍生物,其特征在于具有如下结构式:
R1、R2、R3、R4、R5、R6、R7、R8=葡萄糖基、羟基、氢或OCO(CH2)n CH3
或可选择的R7为羰基;
或可选择的C10和C11,C16和C17形成双键。
所述的其它类型的二萜类化合物,其特征在于具有如下结构式:
R1、R2=葡萄糖基或羟基。
所述的二萜类化合物,其特征在于,该二萜类化合物可以为二萜总提取物也可以是单体化合物。
所述的二萜总提取物的制备方法,其特征在于将干燥的金叶子的叶子药材用含水醇浸泡后进行提取,提取溶剂为40%~90%的乙醇,溶剂用量与药材质量之比为15:1~25:1(L/kg),提取方式可以为回流提取、渗漉提取、超声提取;使用串联树脂法,先用HPD-100型、AB-8型或D101型大孔树脂对提取液进行粗分离,以60~90%的乙醇为溶剂进行洗脱,收集洗脱液,将洗脱液用D941型大孔树脂进行精制处理,干燥得到金叶子二萜总提取物。
所述的单体化合物的分离纯化方法,其特征在于,该单体化合物的分离纯化方法为使用硅胶、凝胶、ODS、制备及半制备液相等多种色谱材料对金叶子二萜总提取物进行分离纯化,得到单体化合物1(compound 1)和化合物2(compound 2)。
所述的二萜总提取物及单体化合物,其特征在于,该二萜总提取物及单体化合物在镇痛方面的应用。
本发明主要通过以下几个步骤实现:
(1)用含水醇对金叶子进行提取。
(2)用树脂串联法对提取物进行纯化。
(3)对纯化后的二萜总提取物进行干燥。
(4)对二萜总提取物进行分离鉴定得到单体化合物。
(5)镇痛实验,用醋酸扭体实验对镇痛活性进行了评价。
其中步骤(1)中,将干燥的金叶子的叶子用40~90%乙醇浸泡4~6小时,溶剂用量为15~25倍。回流提取2~3次,每次0.5~2小时;或渗漉提取,渗漉流速为5~20ml/kg*h;或超声提取3次,每次半小时;将提取液减压浓缩至无醇味。
步骤(2)中,首先用HPD-100型、AB-8型或D101型大孔树脂对提取液进行粗分离,先用纯化水冲洗2~4个柱体积,再用60~90%的乙醇洗脱3~5个柱体积,乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂。
步骤(3)中,可用减压干燥、喷雾干燥、冷冻干燥等方式。
步骤(4)中,可用硅胶、凝胶、ODS、制备及半制备液相等多种色谱材料进行分离纯化。
步骤(5)镇痛实验采用醋酸扭体实验对二萜总提取物及单体化合物的镇痛活性进行评价。
附图说明
图1为通式1;
图2为通式2;
图3为通式3;
图4为通式4。
具体实施方式
为了更好的理解本发明的内容,结合具体实施例对本发明作进一步详细描述,但不作为对本发明的限定。
实施例1
将干燥的金叶子的叶子用40%乙醇浸泡4小时,溶剂用量为25倍。回流提取3次,每次2小时,合并3次的提取液减压浓缩至无醇味,用HPD-100型大孔树脂对提取液进行粗分离,先用纯化水冲洗2个柱体积,再用60%的乙醇洗脱3个柱体积,60%乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂,70℃下减压干燥,既得二萜总提取物。
实施例2
将干燥的金叶子的叶子用40%乙醇浸泡6小时,溶剂用量为15倍。回流提取2次,每次0.5小时,合并2次的提取液减压浓缩至无醇味,用HPD-100型大孔树脂对提取液进行粗分离,先用纯化水冲洗4个柱体积,再用90%的乙醇洗脱5个柱体积,90%乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂,70℃下减压干燥,既得二萜总提取物。
实施例3
将干燥的金叶子的叶子用75%乙醇浸泡4小时,溶剂用量为15倍。渗漉提取,流速5ml/kg*h,提取液减压浓缩至无醇味,用AB-8型大孔树脂对提取液进行粗分离,先用纯化水冲洗4个柱体积,再用60%的乙醇洗脱5个柱体积,60%乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂,喷雾干燥,既得二萜总提取物。
实施例4
将干燥的金叶子的叶子用75%乙醇浸泡6小时,溶剂用量为25倍。渗漉提取,流速20ml/kg*h,提取液减压浓缩至无醇味,用AB-8型大孔树脂对提取液进行粗分离,先用纯化水冲洗2个柱体积,再用90%的乙醇洗脱3个柱体积,90%乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂,喷雾干燥,既得二萜总提取物。
实施例5
将干燥的金叶子的叶子用90%乙醇浸泡5小时,溶剂用量为25倍。超声提取3次,每次半小时,合并3次的提取液,提取液减压浓缩至无醇味,用D101型大孔树脂对提取液进行粗分离,先用纯化水冲洗3个柱体积,再用90%的乙醇洗脱4个柱体积,90%乙醇洗脱液直接通过D941大孔树脂,收集流出液,减压回收溶剂,-30℃冷冻干燥,既得二萜总提取物。
实施例6
取二萜总提取物,乙醇溶解,硅胶拌样后,硅胶柱层析划段,以氯仿、甲醇(CHCl3:MeOH=25:1→6:1)洗脱,得到4个粗粉极性段JR-1、JR-2、JR-3、JR-4。将JR-1用反向材料ODS中压柱层析以甲醇-水(0:100→60:40,v/v)进行分离,得到(Fr.1-Fr.6);Fr.2经正向硅胶柱层析以氯仿-甲醇(15:1)洗脱,得到化合物1(80.0mg);Fr.4经以甲醇-水为溶剂进行重结晶纯化后,得到化合物2(120.0mg)。
实施例7药理实验
取SPF级KM小鼠(18~22g),全雄,随机分为空白组、阳性对照组(阿司匹林,400mg/kg),和实验组,每组均为10只;各实验组均以20mL/kg给药容积灌胃给药,受试样品组给予相应样品,空白组给予等体积纯水,1次/d,连续3d。于末次给药后1h,以10mL/kg给药体积腹腔注射0.6%冰醋酸,10min后观察小鼠在15min内的扭体反应次数(以小鼠出现腹部内凹、躯干与后肢伸张,臀部抬起反应为准),计算抑制率:抑制率(%)=(模型组平均扭体次数-给药组平均扭体次数)/模型组平均扭体次数×100%。实验结果以平均值±SD表示,并对结果进行统计学分析。
注:与空白组比较,*P<0.05,**P<0.01
注:与空白组比较,**P<0.01。
Claims (8)
1.金叶子二萜类化合物,其特征在于该类化合物为木藜芦毒烷或贝壳杉烷及其衍生物或其它类型的二萜。
5.根据权利要求1所述的二萜类化合物,其特征在于,该二萜类化合物可以为二萜总提取物也可以是单体化合物。
6.根据权利要求6所述的二萜总提取物的制备方法,其特征在于将干燥的金叶子的叶子药材用含水醇浸泡后进行提取,提取溶剂为40%~90%的乙醇,溶剂用量与药材质量之比为15:1~25:1(L/kg),提取方式可以为回流提取、渗漉提取、超声提取;使用串联树脂法,先用HPD-100型、AB-8型或D101型大孔树脂对提取液进行粗分离,以60~90%的乙醇为溶剂进行洗脱,收集洗脱液,将洗脱液用D941型大孔树脂进行精制处理,干燥得到金叶子二萜总提取物。
8.根据权利要求6所述的二萜总提取物及单体化合物,其特征在于,该二萜总提取物及单体化合物在镇痛方面的应用。
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