Rhodium-Catalyzed CH Annulation of Nitrones with Alkynes: A Regiospecific Route to Unsymmetrical 2,3-Diaryl-Substituted Indoles
作者:Hao Yan、Haolong Wang、Xincheng Li、Xiaoyi Xin、Chunxiang Wang、Boshun Wan
DOI:10.1002/anie.201503997
日期:2015.9.1
of anilines or related compounds with internal alkynes provides straightforward access to 2,3‐disubstituted indole products. However, this transformation proceeds with poor regioselectivity in the synthesis of unsymmetrically 2,3‐diaryl substituted indoles. Herein, we report the rhodium(III)‐catalyzed CH annulation of nitrones with symmetrical diaryl alkynes as an alternative method to prepare 2,
直接Ç 与内部炔烃苯胺或相关化合物h的环提供了2,3-二取代的吲哚产物直接的访问。然而,在不对称的2,3-二芳基取代的吲哚的合成中,这种转化的区域选择性很差。在本文中,我们报道了铑(III)催化Ç H带对称二芳基炔硝酮环作为一种替代方法,用两种不同的芳基制备2,3-二芳基取代的N-未保护的吲哚。芳基取代基中的一个衍生自硝酮的NC-芳基环,另一个衍生自炔烃底物,因此为吲哚产物提供了独特的区域选择性。