Regiodivergent Annulation of Alkynyl Indoles To Construct Spiro-pseudoindoxyl and Tetrahydro-β-carbolines
作者:Yong-Qiang Zhang、Dao-Yong Zhu、Zhi-Wei Jiao、Bao-Sheng Li、Fu-Min Zhang、Yong-Qiang Tu、Zhigang Bi
DOI:10.1021/ol201194n
日期:2011.7.1
Regiodivergent annulations of 3-phenoxy alkynyl indoles have been developed and tuned by protective groups through gold catalysis. With electron-donating protective groups, the substrate followed a C3-selective annulation and gave structurally interesting tetrahydro-β-carboline derivatives possessing potential bioactivity. Using electron-withdrawing protective groups, the substrate underwent a C2-selective
已经开发了3-苯氧基炔基吲哚的区域发散环,并通过金催化通过保护基进行了调节。带有给电子保护基团的底物经过C3选择性环化,得到结构上令人感兴趣的具有潜在生物活性的四氢-β-咔啉衍生物。使用吸电子保护基团,底物经历了C2选择性环化,并提供了在天然吲哚生物碱中发现的结构上有用的螺-伪吲哚酚。值得注意的是,在C3选择性过程中发现了一个有趣且不寻常的苯氧基1,2-迁移。