Rhodium(III)-Catalyzed Dehydrogenative Annulation and Spirocyclization of 2-Arylindoles and 2-(1<i>H</i>-Pyrazol-1-yl)-1<i>H</i>-indoles with Maleimides: A Facile Access to Isogranulatimide Alkaloid Analogues
作者:Vikki N. Shinde、Krishnan Rangan、Dalip Kumar、Anil Kumar
DOI:10.1021/acs.joc.0c02467
日期:2021.2.5
A Rh(III)-catalyzed dehydrogenative annulation and spirocyclization of 2-arylindoles and 2-(1H-pyrazol-1-yl)-1H-indole with maleimides is described. The cascade protocol provided highly functionalized benzo[a]pyrrolo[3,4-c]carbazole-1,3(2H,8H)-diones and spiro[isoindolo[2,1-a]indole-6,3′-pyrrolidine]-2′,5′-diones in good to excellent. The developed reaction methodology exhibited broad substrate scope
描述了Rh(III)催化的2-芳基吲哚和2-(1H-吡唑-1-基)-1H-吲哚与马来酰亚胺的脱氢环化和螺环化。级联方案提供了高度官能化的苯并[ a ]吡咯并[3,4- c ]咔唑-1,3(2 H,8 H)-二酮和螺[异吲哚并[ 2,1- a ]吲哚-6,3'-吡咯烷] -2',5'-二烯良好。发达的反应方法具有广泛的底物范围和良好的官能团耐受性,并且操作简单且可扩展。研究了环状产物的光物理性质。2-(1 H-吡唑-1-基)-1 H的环状产物与2-苯基吲哚相比,-吲哚显示出高的吸收和发射值,并且具有大的红移。