Copper-Catalyzed CH Oxidation/Cross-Coupling of α-Amino Carbonyl Compounds
作者:Ji-Cheng Wu、Ren-Jie Song、Zhi-Qiang Wang、Xiao-Cheng Huang、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1002/anie.201109027
日期:2012.4.2
indoles selectively furnishes 1 and 2 with the aid of tert‐butyl hydroperoxide (TBHP). The method represents the first example of a copper‐catalyzedα arylation of α‐amino carbonyl substrates leading to α‐aryl α‐imino and α‐aryl α‐oxo carbonyl compounds using a CH oxidation strategy.
Aminocatalytic Cross-Coupling Approach via Iminium Ions to Different CC Bonds
作者:Nagaraju Mupparapu、Narsaiah Battini、Satyanarayana Battula、Shahnawaz Khan、Ram A. Vishwakarma、Qazi Naveed Ahmed
DOI:10.1002/chem.201405477
日期:2015.2.9
on the ability of such iminium cations to promote reactions via an iminium‐catalyzed or iminium‐equivalent pathway are apparently unavailable. Previously, tandem cross‐coupling reactions were reported, in which an iminium ion undergoes nucleophilic 1,2‐addition to give a putative three‐component intermediate that abstracts a proton in situ and undergoes self‐deamination followed by unprecedented DMSO/aerobic
ABSTRACT A novel iron-catalyzed oxidative coupling of indoles with α-amino carbonyl compounds has been developed. The transformation provides an attractive approach to the synthesis of 3-acylindoles, with the advantages of easily available starting materials and high functional group tolerance. Furthermore, control experiments imply that a radical process maybe involved in this reaction. GRAPHICAL
The reaction of indole and β-carbonyl nitrile to generate dicarbonyl indoles has been developed. This process involves α-oxonation of the β-carbonyl nitrile, Friedel–Crafts reaction with indoles and retro-cyanohydrination form dicarbonyl indoles.