Reactions of 2,3′-biindolyl: Synthesis of indolo[3,2-a]carbazoles
作者:Tomasz Janosik、Jan Bergman
DOI:10.1016/s0040-4020(99)00030-7
日期:1999.2
2,3′-biindolyl (9) has been transformed into indolo[3,2-a]carbazoles 16a-b by means of formal [4 + 2] cycloadditions with co-formation of the Michael adducts 17a-b. The parent indolo[3,2-a]carbazole (6) has been prepared in one step from 9 in excellent yield. Several 3-substituted 2,3′-biindolyls have also been prepared in good yields and underwent further transformations, demonstrating the versatility
-2,3'-联吲哚(9)已经被转化成吲哚并[3,2-一个]咔唑16A-B通过正规的手段[4 + 2]与迈克尔加成物的共同形成环加成17A-B 。母体吲哚[3,2- a ]咔唑(6)是由9一步制备的,收率很高。还已经以良好的产率制备了几种3-取代的2,3'-联吲哚基,并进行了进一步的转化,证明了2,3'-联吲哚基(9)的多功能性是合成吲哚[3,2- a ]的基础。咔唑。
Palladium-Catalyzed Tandem Regioselective Oxidative Coupling from Indoles and Maleimides: One-Pot Synthesis of Indolopyrrolocarbazoles and Related Indolylmaleimides
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-substitutedindoles 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。