Microwave-Assisted Synthesis of 3-Nitroindoles from N-Aryl Enamines via Intramolecular Arene–Alkene Coupling
摘要:
A variety of N-aryl beta-nitroenamines were effectively transformed into 3-nitroindoles in good yields and with complete regioselectivity via a rapid microwave (mu V) assisted intramolecular arene alkene coupling reaction. This report further demonstrates the versatility of this method by constructing 3-carboalkozy- and 3-cyanoindoles. Optimization data, substrate scope, and applications are discussed.
Microwave-Assisted Synthesis of 3-Nitroindoles from N-Aryl Enamines via Intramolecular Arene–Alkene Coupling
摘要:
A variety of N-aryl beta-nitroenamines were effectively transformed into 3-nitroindoles in good yields and with complete regioselectivity via a rapid microwave (mu V) assisted intramolecular arene alkene coupling reaction. This report further demonstrates the versatility of this method by constructing 3-carboalkozy- and 3-cyanoindoles. Optimization data, substrate scope, and applications are discussed.
Synthesis of 3-nitroindoles by sequential paired electrolysis
作者:Ashley C. Lindsay、Paul A. Kilmartin、Jonathan Sperry
DOI:10.1039/d1ob01453f
日期:——
methods for the preparation hinder their widespread application. Herein, we report that nitroenamines undergo electrochemical cyclisation to 3-nitroindoles in the presence of potassium iodide. Detailed control experiments and cyclic voltammogram studies infer the reaction proceeds via a sequential paired electrolysis process, beginning with anodic oxidation of iodide (I−) to the iodine radical (I˙),