Palladium-Catalyzed Tandem Regioselective Oxidative Coupling from Indoles and Maleimides: One-Pot Synthesis of Indolopyrrolocarbazoles and Related Indolylmaleimides
作者:Yu-Long An、Zhen-Hua Yang、He-Hui Zhang、Sheng-Yin Zhao
DOI:10.1021/acs.orglett.5b02944
日期:2016.1.15
8-diones has been developed from both free and protected (NH) indoles and maleimides via a regioselective tandem oxidative coupling reaction. The yields are moderate to excellent. In addition, 2-substituted indoles are suitable substrates in this protocol, leading to the formation of indolylmaleimides. The present methodology provides a concise route to highly functionalized indolopyrrolocarbazole derivatives
从游离和受保护的(吲哚)吲哚和二氢吲哚都开发了一种有效的Pd(II)催化方法,用于直接合成吲哚并[3,2- a ]吡咯并[3,4- c ]咔唑-6,8-二酮。通过区域选择性串联氧化偶联反应进行马来酰亚胺。产量中等至极好。另外,在该方案中2-取代的吲哚是合适的底物,导致吲哚基马来酰亚胺的形成。本方法学提供了高度官能化的吲哚并吡咯并咔唑衍生物的简洁途径。