An efficient and environmentally benign electrochemical oxidative radical C–H sulfonylation of arenes/heteroarenes was developed in this work. A series of significant diarylsulfones were prepared under mild catalyst- and exogenous-oxidant-free reaction conditions, which efficiently avoid the issues of desulfonylation or over-reduction of sulfonyl groups.
Nickel-Catalyzed Intramolecular Nucleophilic Addition of Aryl Halides to Aryl Ketones for the Synthesis of Benzofuran Derivatives
作者:Chen-Liang Deng、Xiao-Rui Zhu
DOI:10.1055/s-0040-1706662
日期:2021.5
A nickel-catalyzed intramolecularnucleophilicaddition reaction of aryl halides to arylketones for the formation of benzofuran derivatives has been developed. A number of substrates bearing electron-donating or electron-withdrawing groups were subjected to the standard reaction conditions, giving the corresponding products in moderate to good yields.
Optionally substituted (2-nitro-3-benzofuranyl)-benzoic acids which are active as antimicrobial agents, processes for their preparation and intermediates therefor are described.
描述了作为抗微生物剂活性的(2-硝基-3-苯并呋喃基)-苯甲酸,以及它们的制备方法和中间体。
Direct Arylation of Benzo[<i>b</i>]furan and Other Benzo-Fused Heterocycles
作者:Toan Dao-Huy、Maximilian Haider、Fabian Glatz、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1002/ejoc.201403125
日期:2014.12
The directarylation of benzo[b]furan, benzo[b]thiophene, and indole has been studied by using aromatic bromides as the aryl source. The protocol employing common reagents and a Pd catalyst has led to the regioselective arylation of these heterocycles at the 2-position. A range of functional groups were tolerated, providing quick access to a variety of arylated benzo-fusedheterocycles that would be
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.