CN1130619A - 一种异臭椿酸类三萜化合物及其提取方法 - Google Patents
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Abstract
本发明涉及一种从海绵中分离提取的异臭椿酸类三萜化合物。
本发明所述的化合物的命名为(13E,15E,17E,22E,24E)-3,12-二氧-13,15,17,22,24-五烯-26-异臭椿酸,其化学结构式如下:
该化合物是以乙醇从海绵中抽提,并以石油醚等溶剂萃取分离,经硅胶和葡聚糖凝胶反复柱层析,以适当溶剂淋洗后而得到的。该化合物不但具有新的化学结构,而且具有明显的免疫活性,因此具有良好的应用前景。
Description
本发明涉及一种从海绵中分离提取的异臭椿酸类三萜化合物。
海绵是自然界中最原始的海洋多细胞动物,它的长久不腐烂现象揭示其中存在毒性极强的物质。目前人们已从海绵中获得了许多萜类、生物碱、大环内酯和甙类等具有抗菌、抗病毒、抗心血管病、抗肿瘤活性及免疫功能的物质,大大丰富了海洋天然产物化学的内容。海绵中虽然存在着丰富的萜类化合物,但迄今为止所发现的三萜化合物的种类和数量都很少,而具有异臭椿酸骨架的三萜化合物更是罕见。
化合物1的化学命名为:(13E,15E,17E,22E,24E)-3,12-二氧-13,15,17,22,24-五烯-26-异臭椿酸。与本发明所涉及新化合物结构最相似的化合物命名为:(13Z,15E,17E,22E,24Z)-3,12-二氧-13,15,17,22,24-五烯-26-臭椿酸,其结构式为:
新化合物(1)与已知化合物(2)结构式对比可知,虽然二者具有一致的碳骨架,但两个化合物中三个环的成环方式截然不同,(1)为顺反成环,而(2)为反反成环,此外,(1)中13,14位与24,25位双键均为E式构型,而(2)中13,14位与24,25位双键均为Z式构型,可见,新化合物(1)和已知化合物(2)之间存在显著的立体化学差异,这种差异在研究化合物的生物合成过程,构效关系等方面具有十分重要的意义。本发明所涉及的新化合物(1)的物理化学常数如下:m.p.:169-171℃;[α]D(c=0.006,丙酮):-61.6°;λmax(c=3.5×10-5,丙酮)nm:396(ε=8740),410(ε=85200);νmax(cm-1):3427,2939,1710,1691,1579,1541,1422,1391,1289,1183,1160,974,803;δ1H(CDCl3)ppm:7.42(1H,d,J=9.3Hz),7.06(1H,dd,J=11.8,14.5Hz),6.76(1H,d,J=15.0Hz),6.676(1H),6.659(1H),6.44(1H,d,J=11.4Hz),2.76(1H,m),2.44(1H,m),2.37 (3H,s),2.25(2H,dd,J=10.0,2.9Hz),2.21(2H,m),2.07(3H,s),2.05(3H,s),1.90(1H,dd,J=10.0,12.1Hz),1.64(1H,m),1.54(2H,m),1.46(3H,s),1.15(3H,s),1.08(3H,s)0.88(3H,s);δ13c(CDCl3)ppm:219.19,207.15,173.36,146.77,144.37,141.75,140.60,138.55,135.58,134.71,131.90,126.55,124.77,47.93,46.92,45.55,45.08,38.56,36.74,34.85,33.52,31.43,29.30,26.01,23.52,19.82,19.45,14.59,13.08,12.65;m/z:464(M+),449,365,313,241,159,119,69,55(100),43。HRMS:464.2943(实验值),464.2927(计算值)。
化合物(1)的分离提取方法如下:海绵破碎后用乙醇抽提,将抽提物浓缩至浆状,然后将其分散于适量水中,再以石油醚,乙酸乙酯和正丁醇依次进行萃取分离,将所得乙酸乙酯部分经硅胶柱和葡聚糖凝胶柱反复柱层析,以石油醚-乙酸乙酯和氯仿-甲醇作淋洗剂,将洗出液减压浓缩后得到金黄色固体,再将该固体溶解于适量苯中,得到圆片状晶体,即所得新化合物(1)。化合物(1)的免疫活性测定结果如表1所示:表1:化合物1免疫活性测试结果
测试目的 | 测试体系 | 测试模型 | 观察指标 | 剂量或浓度 | 测试效应 |
免疫免疫 | 体外体外 | B淋细胞增殖T淋细胞增殖 | 抑制抑制 | 1×10μM1×1.0μM1×0.1μM1×10μM1×1.0μM1×0.1μM | 12%94%119%14%19%115% |
本发明所述的新化合物,不但具有新的化学结构,而且具有显著的免疫活性,因此无论从理论还是应用前景来看,本发明所涉及的新化合物都具有十分重要的价值。
实施例:
中国南海黄色海绵2.7公斤(干重量)破碎后用95%的工业乙醇室温抽提三次,抽提物合并后减压浓缩至浆状物。将该浆状物均匀分散于500ml蒸馏水中,以乙酸乙酯(500ml×3)抽提,抽提物减压浓缩得浆状物64克。乙酸乙酯浓缩物经硅胶柱层析,以石油醚-乙酸乙酯梯度淋洗,得到不同极性部分,其中石油醚-乙酸乙酯(7∶3)淋洗部分减压浓缩后,再以硅胶柱层析,用石油醚-丙酮(85∶15)淋洗,洗出液减压浓缩,浓缩产物再经葡聚糖凝胶LH20柱层析,淋洗液为氯仿-甲醇(3∶7),洗出液减压浓缩后得到金黄色固体,将该固体溶于适量苯中,室温放置,得到圆片状晶体,即本发明所述之化合物(1)的纯品60毫克。经比旋光,红外光谱,紫外光谱,质谱,核磁共振光谱等方法确定其结构式为:
Claims (2)
化学命名为:(13E,15E,17E,22E,24E)-3,12-二氧-13,15、17,22,24-五烯-26-异臭椿酸。该化合物的物理化学常数为:m.p.:169—171℃;[α]D(c=0.006,丙酮):-61.6°;λmax(c=3.5×10-5,丙酮)nm:396(ε=87400),410(ε=85200);νmax(cm-1):3427,2939,1710,1691,1579,1541,1422,1391,1289、1183,1160,974,803;δ1H(CDCl3)ppm:7.42(1H,d,J=9.3Hz),7.06(1H,dd,J=11.8,14.5Hz),6.76(1H,d,J=15.0Hz),6.676(1H),6.659(1H),6.44(1H,d,J=11.4Hz),2.76(1H,m),2.44(1H、m),2.37(3H,s),2.25(2H,dd,J=10.0,2.gHz),2.21(2H,m),2.07(3H,s),2.05(3H,s),1.90(1H,dd,J=10.0,12.1Hz.),1.64(1H,m),1.54(2H,m),1.46(3H,s),1.15(3H,s),1.08(3H,s)0.88(3H,s);δ13c(CDCl3)ppm:219.19,207.15,173.36,146.77,144.37,141.75,140.60,138.55,135.58,134.71,131.90,126.55,124.77,47.93,46.92,45.55,45.08,38.56,36.74,34.85,33.52,31.43,29.30,26.01,23.52,19.82,19.45,14.59,13.08,12.65;m/z:464(M+),449,365,313,241,159,119,69,55(100),43。HRMS:464.2943(实验值),464.2927(计算值)。
2.一种专用于从海绵中提取权利要求1中所述的化合物的方法,其特征在于,海绵用乙醇抽提,将抽提物浓缩至浆状,使其分散于适量水中,再以石油醚,乙酸乙酯和正丁醇进行萃取分离,将所得中等极性溶剂部分经硅胶柱和葡聚糖凝胶柱反复柱层析,以石油醚-乙酸乙酯,氯仿-甲醇为淋洗剂,将洗出液减压浓缩后得到金黄色固体,再将该固体溶于适量苯中,放置得到纯的圆片状晶体,即权利要求1中所述的化合物。
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CN1067052C (zh) * | 1998-07-16 | 2001-06-13 | 中国科学院广州化学研究所 | 一种异臭椿酸甲酯及制备方法 |
CN105453221A (zh) * | 2013-08-09 | 2016-03-30 | Lg矽得荣株式会社 | 外延反应器 |
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CN100402483C (zh) * | 2006-06-12 | 2008-07-16 | 中国科学院广州化学研究所 | 西米特酸的提取方法 |
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CN105453221A (zh) * | 2013-08-09 | 2016-03-30 | Lg矽得荣株式会社 | 外延反应器 |
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