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.