Exploring the Structural Basis of Neurotoxicity in C<sub>17</sub>-Polyacetylenes Isolated from Water Hemlock
作者:Koji Uwai、Katsuyo Ohashi、Yoshiaki Takaya、Tomihisa Ohta、Takeshi Tadano、Kensuke Kisara、Koichi Shibusawa、Ryoji Sakakibara、Yoshiteru Oshima
DOI:10.1021/jm000185k
日期:2000.11.1
Water hemlock, Cicuta virosa, belonging to the Umbelliferae, is well-known as a toxic plant responsible for lethal poisonings in humans as well as animals, causing tonic and clonic convulsions and respiratory paralysis. Cicutoxin (1), being a major violent toxin of the plant, is a chemical in the class of C(17)-polyacetylenes bearing a long pi-bond conjugation system, a terminal hydroxyl, and an allylic
属于伞形科的铁杉(Cicuta virosa)是一种有毒植物,众所周知,是一种有毒植物,可导致人类和动物致命中毒,导致滋补和阵挛性抽搐和呼吸麻痹。Cicutoxin(1)是植物的主要暴力毒素,是C(17)-聚乙炔类的化学物质,在其结构中具有长pi键共轭系统,末端羟基和烯丙基羟基,并且已从植物中分离出多种类似物。在本研究中,这些毒素的各种衍生物是通过西妥昔因(1)和病毒A(3)和B(4)的乙酰化,甲基化和氧化合成的。通过在Sonogashira的条件下将(7S)-dodeca-3,5-dien-1-yn-7-ol和1-iodopentyne偶联制备1-Dehydroxyvirol A(28)。还通过(5S)-1-氯癸-1,3-二烯-5-醇和1-碘戊炔-5-醇的偶联制备单炔化合物(29)。研究了西葫芦毒素衍生物对小鼠的急性毒性所涉及的构效关系,发现π键结合的长度和几何形状以及O-官能团对活性很