Synthesis of 6-Substituted 2-Pyrrolyl and Indolyl Benzoxazoles by Intramolecular <i>O</i>-Arylation in Photostimulated Reactions
作者:Victoria A. Vaillard、Javier F. Guastavino、María E. Budén、Javier I. Bardagí、Silvia M. Barolo、Roberto A. Rossi
DOI:10.1021/jo202386b
日期:2012.2.3
The synthesis of a series of 6-substituted 2-pyrrolyl and 2-indolyl benzoxazoles by photostimulated C–O cyclization of anions from 2-pyrrole carboxamides, 2-indole carboxamides, or 3-indole carboxamides has been found to proceed in good to excellent yields (41–100%) in DMSO and liquid ammonia. The pyrrole and indole carboxamides are obtained in good to very good isolated yields by an amidation reaction
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.
One-pot synthesis of pyrrolo[1,2-a]quinoxalines
作者:Aiping Huang、Feng Liu、Chunjing Zhan、Yanli Liu、Chen Ma
DOI:10.1039/c1ob05936j
日期:——
A transition metal-free process for the regioselective synthesis of pyrrolo[1,2-a]quinoxalines under mild conditions in one-pot is described. The reaction afforded a variety of products in good to excellent yields. Indolo[1,2-a]quinoxalines were also synthesized from indole-2-carboxamides under the same conditions.
描述了在温和条件下在一锅中用于区域选择性合成吡咯并[1,2- a ]喹喔啉的无过渡金属工艺。该反应以良好至优异的产率提供了多种产物。在相同条件下,吲哚-2-羧酰胺也可以合成吲哚并[1,2- a ]喹喔啉。
An Atom-Economical Method for the Formation of Amidopyrroles Exploiting the Self-Assembled Resorcinarene Capsule
作者:Pellegrino La Manna、Carmen Talotta、Margherita De Rosa、Annunziata Soriente、Carmine Gaeta、Placido Neri
DOI:10.1021/acs.orglett.0c00529
日期:2020.4.3
Here is reported the first example of an organocatalyzed coupling between pyrrole and isocyanates in a nanoconfined space. The hexameric resorcinarene capsule C is able to catalyze the direct coupling between isocyanates and pyrroles to give amidopyrroles with excellent yields and selectivities. The reaction catalyzed by C prevents the use of expensive and poorly atom-economical reagents. As in natural