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具有抗肿瘤活性的青蒿酸衍生物 总被引:3,自引:0,他引:3
中药青蒿为菊科植物黄花蒿(Artemisiaannua L.),我国民间用于治疗疟疾,并已从中分离到抗疟药青蒿素,从而引起人们对此植 相似文献
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Arteannuin (1), a new sesquiterpene lactone containing a peroxide group, is the antimalarial active principle isolated from Artemisia annua L. Deoxyarteannuin (2) occurs in the same plant and was isolated as a metabolite from the urine of patients treated with arteannuin. We now report a stereocontrolled synthesis of these two naturally occurring sesquiterpene lactones starting from arteannuic acid (5) by the reaction sequence as shown in Scheme 2 (see Chinese Text). Irradiation of the methanolic solution of the key intermediate 3 in the resence of oxygen and a sensitizer (Rose Bangal) with 200 W high pressure mercury lamp followed by acid treatment gave 1 in 28% yield (2 steps), m.p. 151-153`c, 相似文献
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本文报道以青蒿酸(2)为原料合成了一些含羟基的青蒿倍半萜内酯差向异构体9与10、11与12、13与14。其中9已从青蒿中分离到。 相似文献
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奇蒿内酯是从中草药刘寄奴提取的新化合物.用X射线单晶衍射方法确定了其三维结构,此单晶属单斜晶系,空间群:P21,晶胞参数:a=12.184(7),b=7.480(14),c=10.424(9)A,β=-104.44(6);Z=2.用直接法RANTAN)得分子初结构模型,采用块对角矩阵最小二乘法对此初结构进行修正,最后一致性因子R=0.085.并利用氧原子反常散射确定了分子的绝对构型。 相似文献
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Using sesquiterpene lactone rule, the absolute configurations of seven sesquiterpene α-methylene-γ-lactones were confirmed. Compounds 1, 2, 3, 4 and 6, 7 are cis-fused γ-lactones, and compound 5 is trans-fused γ-lactone. 相似文献