Cu(OTf)2 catalysed [6+2] cycloaddition reaction for the synthesis of highly substituted pyrrolo[1,2-a]indoles: rapid construction of the yuremamine core
作者:Dattatraya H. Dethe、Raghavender Boda、Saikat Das
DOI:10.1039/c3cc40617b
日期:——
Lewisacid catalysed [6+2] cycloaddition reaction for the synthesis of pyrrolo[1,2-a]indoles generating three contiguous stereocenters in a highly regio- and diastereoselective manner has been developed and further applied for the construction of the fully functionalized tricyclic core of yuremamine.
Expedient synthesis of densely substituted pyrrolo[1,2-a]indoles
作者:Dattatraya H. Dethe、Raghavender Boda
DOI:10.1039/c6ob00861e
日期:——
indolyl-2-carbinols with various dienophiles such as indole derived α,β-unsaturated esters, ketones, nitriles and cinnamates is described. The strategy was further applied for the synthesis of optically active pyrrolo[1,2-a]indoles in >97% de using the chiral auxiliary based approach.
描述了Cu(OTf)2催化吲哚基-2-甲醇与各种双亲物如吲哚衍生的α,β-不饱和酯,酮,腈和肉桂酸酯的[6 + 2]环加成反应。该策略进一步被应用到基于手性助剂的合成中,以> 97%de的光学活性吡咯并[1,2- a ]吲哚合成。
Pd(II) supramolecular cage-catalyzed successive oxidative coupling: One-pot and regioselective synthesis of functionalized carbazoles from indoles
作者:Xi-Ren Wu、He-Long Peng、Lian-Qiang Wei、Li-Ping Li、Su-Yang Yao、Bao-Hui Ye
DOI:10.1016/j.catcom.2019.02.023
日期:2019.5
compound in pharmaceuticals and functional materials. A new Pd(II) supramolecular cage-catalyzed protocol for the synthesis of multifunctional carbazoles from indoles is described through regioselective successive oxidative Heck reactions. This new protocol is highly efficient, with a low Pd (2.4 mol%) catalyst loading and good compatibility for both N-H free and N-protected indole substrates. Moreover, it
cascade, which involves oxidation of 2-naphthols to 1,2-naphthoquinones, Diels-Aldercycloaddition, aerial dehydroaromatization and cyclocondensation. With unprotected dienic indolylacrylates, NH⋯O hydrogen bonding in the transition state controls the product selectivity almost exclusively in favor of Diels-Aldercycloaddition over the competing Michael addition. The utility of one of the carbazolo-phenzines
the first example of the synthesis of carbazoles via oxidative cyclization of 3-alkenylindoles with styrenes under visible light. The irradiation of a catalytic amount of [Ir(dtbbpy)(ppy)2][PF6] as the photocatalyst enables various 3-alkenylindoles and styrenes to undergo tandem [2 + 2] cycloaddition/rearrangement, thereby leading to carbazole derivatives in good to excellent yields under aerobic conditions