A transition metal-free tandem process to pyrrolopyrazino[2,3-d]pyridazine-diones
作者:Aiping Huang、Zhi Qiao、Xinhai Zhang、Wei Yu、Qingqing Zheng、Ying Ma、Chen Ma
DOI:10.1016/j.tet.2011.11.021
日期:2012.1
A transition metal-free tandem process for the synthesis of pyrrolopyrazino[2,3-d]pyridazine-diones is described. The process is an efficient construction of this tricyclic system by a one-pot coupling/Smiles rearrangement/cyclization approach. This methodology has potential applications in the synthesis of biologically and medicinally relevant compounds. (C) 2011 Elsevier Ltd. All rights reserved.
TfOH-Catalyzed Cascade C–H/N–H Chemo-/Regioselective Annulation of Indole-2-carboxamides with Benzoquinones for the Construction of Anticancer Tetracyclic Indolo[2,3-<i>c</i>]quinolinones
作者:Lingkai Kong、Wenyue Tian、Zhiyan Liu、Ting Xu、Haoyue Wen、Zihan Chen、Jin Gao、Li-Ping Bai
DOI:10.1021/acs.joc.2c00598
日期:2022.6.17
An efficient TfOH-catalyzed cascadeC–H/N–H annulation of indole-2-carboxamides with benzoquinones has been developed for the synthesis of tetracyclic indolo[2,3-c]quinolinones. This reaction exhibits excellent chemo-/regioselectivity, achieving functionalization of the C-3 of indole and N–H of the amide moiety to form the new C–C and C–N bonds. Various expected products were synthesized from readily