The bis-guanidinium toxins are a collection of natural products that display nanomolar potency against select isoforms of eukaryotic voltage-gated Na+ ion channels. We describe a synthetic strategy that enables access to four of these poisons, namely 11-saxitoxinethanoic acid, C13-acetoxy saxitoxin, decarbamoyl saxitoxin, and saxitoxin. Highlights of this work include an unusual Mislow-Evans rearrangement
双
胍盐毒素是
天然产物的集合,这些
天然产物对真核电压门控Na +离子通道的某些同工型具有纳摩尔效价。我们描述了一种合成策略,该策略能够获取其中四种毒物,即11-萨克毒素毒素,C13-乙酰氧基毒素,十
氨基甲酰基毒素和毒素。这项工作的重点包括异常的Mislow-Evans重排和后期的Stille
乙烯酮缩醛偶联。相对于大鼠NaV 1.4测量了11-萨克斯毒素乙基酸的IC50值,发现其为17.0 nm,类似于
硫酸毒素gonyautoxin II和III的IC50值。