四氫-β-咔啉生物堿衍生物的合成與活性研究
發(fā)布時(shí)間:2019-03-20 09:57
【摘要】:四氫-β-咔啉生物堿是自然界中常見的吲哚類生物堿,其中一個(gè)側(cè)環(huán)中含有一個(gè)氮原子位于吲哚氮的β位。四氫-β-咔啉生物堿主要存在于苦木科、藜蘆科等植物的根、皮、葉和種子以及海洋生物中。四氫-β-咔啉生物堿具有廣泛的生物活性和藥理作用如抗腫瘤、抗病毒、抗菌、抗血小板凝聚等活性。近年來的研究發(fā)現(xiàn),Rh(Ⅱ)-卡賓(一種由N-對(duì)甲苯磺酰基-1,2,3-三氮唑重氮前體獲得的中間體)在合成氮雜環(huán)化合物方面有巨大優(yōu)勢,考慮到四氫-β-咔啉化合物合成方法的局限性,本研究發(fā)展了一種基于Rh-AVC的全新合成四氫-β-咔啉化合物的方法。本研究圍繞四氫-β-咔啉衍生物的合成展開工作,重點(diǎn)對(duì)四氫-β-咔啉骨架的合成方法、四氫-β-咔啉結(jié)構(gòu)多樣性衍生、生物活性和構(gòu)效關(guān)系四個(gè)方面進(jìn)行了研究。在合成方法方面,我們發(fā)展了一種基于二價(jià)銠催化劑催化的N-磺;-1,2,3-三氮唑與吲哚環(huán)發(fā)生的分子內(nèi)環(huán)合合成C4-取代的四氫-β-咔啉化合物的方法,該合成方法具有產(chǎn)率高、反應(yīng)迅速等特點(diǎn)。本研究共合成了19個(gè)四氫-β-咔啉化合物及4個(gè)相關(guān)產(chǎn)物,這23個(gè)化合物都是未經(jīng)報(bào)道的新化合物。還設(shè)計(jì)了一個(gè)三步一鍋法合成四氫-β-咔啉化合物,并完成了天然產(chǎn)物Oxopropaline G的形式合成。所有的化合物都經(jīng)過1H-NMR,13C-NMR和HRMS對(duì)結(jié)構(gòu)進(jìn)行鑒定。在活性測試方面,對(duì)23個(gè)四氫-β-咔啉化合物進(jìn)行了體外的抗Hela細(xì)胞活性測試,測試結(jié)果表明,大多數(shù)化合物對(duì)Hela細(xì)胞都有抑制活性,其中11e、11f、11l、11m、11p、11r和11v這7個(gè)化合物,在40μmol/mL時(shí),抑制率分別為65.6%、73.7%、69.5%、53.9%、61.9%、55.7%及53.7%,具有一定的生物活性。通過構(gòu)效關(guān)系分析,吲哚環(huán)上所帶取代基R1的大小、位置及電負(fù)性對(duì)活性都有影響。所帶基團(tuán)越大,電負(fù)性越強(qiáng),空間位阻越大,對(duì)Hela細(xì)胞的抑制活性越小,但在四氫-β-咔啉生物堿的5位和6位帶有甲氧基,會(huì)增強(qiáng)抑制活性。而吲哚氮原子上所帶取代基的電負(fù)性對(duì)抑制活性的影響更明顯,電負(fù)性越強(qiáng),結(jié)構(gòu)越穩(wěn)定,對(duì)Hela細(xì)胞的抑制活性也越大。
[Abstract]:Tetrahydro-尾-carbavirin alkaloid is a common indole alkaloid in nature. One of the lateral rings contains a nitrogen atom located at the 尾 site of indole nitrogen. Tetrahydro-尾-carbavirin alkaloids are mainly found in the roots, skins, leaves and seeds as well as in marine organisms of the family Sophorae, Chenopodiaceae and other plants. Tetrahydro-尾-carbavirin alkaloids have a wide range of biological activities and pharmacological effects, such as anti-tumor, anti-virus, antibacterial, anti-platelet aggregation and other activities. In recent years, it has been found that, Rh (鈪,
本文編號(hào):2444107
[Abstract]:Tetrahydro-尾-carbavirin alkaloid is a common indole alkaloid in nature. One of the lateral rings contains a nitrogen atom located at the 尾 site of indole nitrogen. Tetrahydro-尾-carbavirin alkaloids are mainly found in the roots, skins, leaves and seeds as well as in marine organisms of the family Sophorae, Chenopodiaceae and other plants. Tetrahydro-尾-carbavirin alkaloids have a wide range of biological activities and pharmacological effects, such as anti-tumor, anti-virus, antibacterial, anti-platelet aggregation and other activities. In recent years, it has been found that, Rh (鈪,
本文編號(hào):2444107
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