Electrochemical Oxidative [4+2] Annulation for the π‐Extension of Unfunctionalized Heterobiaryl Compounds
作者:Xia Hu、Lei Nie、Guoting Zhang、Aiwen Lei
DOI:10.1002/anie.202003656
日期:2020.8.24
biological activities, regioselective access to fused aromatic compounds is significantly important in the field of organic materials and pharmaceutical science. Herein, we developed electrochemical oxidative [4+2] annulationreactions of heterobiaryl compounds with alkynes or alkenes, leading to the formation of several polycyclic heteroaromatic compounds. This electrosynthetic methodology serves for
Benzofurans from Benzophenones and Dimethylacetamide: Copper-Promoted Cascade Formation of Furan O1C2 and C2C3 Bonds Under Oxidative Conditions
作者:María J. Moure、Raul SanMartin、Esther Dominguez
DOI:10.1002/anie.201108513
日期:2012.3.26
benzofuran core through a cascade of copper‐catalyzed processes wherein the key carbon atom comes from the dimethylacetamide (DMA) solvent. Strong evidence for the participation of a Wacker cyclization catalyzed solely by copper is provided, not only in the title reaction from benzophenones but also from 2‐hydroxy‐α‐arylstyrene derivatives.
eye: A simple and efficient protocol for the synthesis of benzofuran and naphthofuran derivatives catalyzed by indium triflate was developed by coupling α,β‐unsaturated nitroalkenes with phenol/naphthols. The present method provides arenofuran derivatives in one pot from readily available starting materials (DCE=1,2‐dichloroethane; see scheme).
2-Nitro-3-phenylbenzofurans wherein the benzo or 3-phenyl portion of the molecule is bonded directly to an optionally substituted amino group, which are active as antimicrobial agents and processes for their use.