Jafrine, a novel and labile β-carboline alkaloid from the flowers of Tagetes patula
作者:Shaheen Faizi、Aneela Naz
DOI:10.1016/s0040-4020(02)00615-4
日期:2002.7
inherently unstable and structurally novel tetrahydro β-carboline alkaloid, (+) jafrine (1) was isolated from the petroleum ether extract of Tagetes patula flowers. Its structure and stereochemistry has been determined with the help of spectroscopic analysis and the synthesis of racemate, (±) jafrine starting from available (±) tetrahydroharmine (2). The effect of solvent polarity on the ratio of amide rotamers
从Tagetes patula花的石油醚提取物中分离出固有不稳定的结构上新颖的四氢β-咔啉生物碱(+)af麻碱(1)。它的结构和立体化学已经通过光谱分析和外消旋物(±)贾夫林的合成从可用的(±)四氢甜菜碱开始确定(2)。讨论了在NMR研究过程中溶剂极性对贾夫林酰胺旋转异构体比率的影响。贾夫林以及4- N-乙酰基四氢大麻素的转化(3),观察到通过自氧化成2-乙酰基色胺的衍生物,并给出了其详细信息。该方法可用作制备类固醇胺衍生物的合成工具。