We describe the synthesis of the novel 2-(1,5-dimethyl-4-oxo-hexyl)-3-hydroxy-5-methyl-6-pyrrolyl-1,4-benzoquinone 2 from the natural product perezone 1. The anion–guest properties of the new compound were evaluated in the presence of fluoride, chloride, bromide and iodide tetrabutylammonium salts using 1H NMR titration techniques in deuterated dichloromethane or dimethylformamide. The title compound showed interesting colorimetric behavior in the presence of inorganic salts.

中文翻译：

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一种新型半合成阴离子受体：(1-H-pyrrol-2-yl)-4-oxo-perezone 的合成和离子识别

我们描述了从天然产物 perezone 1 合成新型 2-(1,5-dimethyl-4-oxo-hexyl)-3-hydroxy-5-methyl-6-pyrrolyl-1,4-benzoquinone 2。阴离子– 在氟化物、氯化物、溴化物和碘化物四丁基铵盐存在下，使用 1H NMR 滴定技术在氘代二氯甲烷或二甲基甲酰胺中评估了新化合物的客体特性。标题化合物在无机盐存在下显示出有趣的比色行为。