1-Phenyl-1,2-benziodoxol-3-(1<i>H</i>
)-one as Synthon for Phthalide Synthesis through Pd-Free, Base-Free, Sonogashira-Type Coupling Cyclization Reaction
作者:Ahmad A. Almasalma、Esteban Mejía
DOI:10.1002/ejoc.201700940
日期:2018.1.17
heterocycles have found broad application as atom-transfer reagents for organic synthesis. Among them, 1-Phenyl-1,2-benziodoxol-3-(1H)-one is known as a traditional benzyne precursor, but no further synthetic applications have been reported. Herein, we report the first synthetic application of 1-phenylbenzidoxole to the synthesis of Phthalides using only CuI as catalyst. High selectivity and yield were achieved
高价碘 (III) 五元杂环已被广泛用作有机合成的原子转移试剂。其中,1-Phenyl-1,2-benziodoxol-3-(1H)-one 被称为传统的苄前体,但没有进一步的合成应用报道。在此,我们报告了仅使用 CuI 作为催化剂的 1-苯基苯并氧杂环戊烷在邻苯二甲酸酯合成中的首次合成应用。在温和的反应条件下实现了高选择性和高产率,并具有良好的官能团耐受性。在我们的研究过程中,研究了不同反应条件下不同 CuI 和 CuII 催化剂的效率。离去基团的性质、底物上的取代基和温度对产率和选择性都起着重要作用。而且,