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Stereocontrolled Synthesis of 8,11-Dideoxytetrodotoxin,An Unnatural Analogue of Puffer Fish Toxin

机译:立体控制的8,11-双脱氧河豚毒素的合成,河豚鱼毒素的一种非天然类似物

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摘要

8,11-Dideoxytetrodotoxin,an unnatural tetrosotoxin analogue,was synthesized in a highly stereoselective manner from a common intermediate from our synthetic studies on tetrodotoxin.The key features in the synthesis were as follows:neighboring group participation of a trichloroacetamide to allow regioselective and stereoselective hydroxylation,protection of a delta-hydroxylactone as an ortho ester,and guanidine installation through the use of Boc-protected isothiourea.Global deprotection of the fully protected intermediate under acidic conditions gave 8,11-dideoxytetrodotoxin,which exhibited very weak biological activities.
机译:从我们合成的河豚毒素的普通中间体中,以高度立体选择性的方式合成了8,11-脱氧河豚毒素类似物,这是一种非天然的河豚毒素类似物。该合成的主要特征如下:三氯乙酰胺的相邻基团参与使得区域选择性和立体选择性通过使用Boc保护的异硫脲进行羟基化,保护δ-羟基内酯作为原酸酯和安装胍基化合物。在酸性条件下对完全保护的中间体进行全局脱保护,得到8,11-二脱氧河豚毒素,其生物活性非常弱。

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