Access to acridones by tandem copper(<scp>i</scp>)-catalyzed electrophilic amination/Ag(<scp>i</scp>)-mediated oxidative annulation of anthranils with arylboronic acids
An efficient and practical approach for the synthesis of medicinally important acridones was developed from anthranils and commercially available arylboronic acids by a tandem copper(I)-catalyzed electrophilic amination/Ag(I)-mediated oxidative annulationstrategy. This new and straightforward protocol displayed a broad substrate scope (25 examples) and high functional group tolerance. What's more
Dimethyl sulfoxide-aided copper(0)-catalyzed intramolecular decarbonylative rearrangement of N-aryl isatins leading to acridones
作者:Hao Wu、Nana Ma、Mengxiao Song、Guisheng Zhang
DOI:10.1016/j.cclet.2019.10.043
日期:2020.6
Abstract Described here is the first example of Cu(0)-catalyzed intramolecular decarbonylative rearrangements of readily available N-aryl isatins assisted by solvent dimethyl sulfoxide (DMSO) under air atmosphere and additive-free conditions leading to various biologically important acridones in good to excellent yields. This novel transformation is proposed to go through a sequential DMSO-aided Cu
Copper-Catalyzed Aerobic Oxidative CH and CC Functionalization of 1-[2-(Arylamino)aryl]ethanones Leading to Acridone Derivatives
作者:Jipan Yu、Haijun Yang、Yuyang Jiang、Hua Fu
DOI:10.1002/chem.201204169
日期:2013.3.25
Efficient copper‐catalyzedaerobicoxidative CH and CC functionalization of 1‐[2‐(arylamino)aryl]ethanones leading to acridones has been developed. The procedure involves cleavage of aromatic CH and acetyl CC bonds with intramolecular formation of a diarylketone bond. The protocol uses inexpensive Cu(O2CCF3)2 as catalyst, pyridine as additive, and economical and environmentally friendly oxygen
The reaction of o-aminoacetophenones and arylboronic acids catalyzed by copper(II) salts in the presence of pyridine under an O2 atmosphere provides a general and efficient one-pot preparation of biologically interesting acridones. This relay reaction comprises an intermolecular Suzuki cross-coupling, intramolecular oxidative C(sp3)–H amination, and C(sp2)–H activation with simultaneous rearrangement
A Novel Palladium-Based Heterogeneous Catalyst for Tandem Annulation: A Strategy for Direct Synthesis of Acridones
作者:Darío C. Gerbino、H. Sebastián Steingruber、Pamela Mendioroz、M. Julia Castro、María A. Volpe
DOI:10.1055/s-0042-1751371
日期:2023.2
In order to develop an efficient, rapid, and modular cascade strategy for the direct synthesis of acridones, palladium supported on sulfated alumina and microwave activation are employed. Multifunctional heterogeneous palladium catalysts were prepared in order to carry out the sequential annulation via a Buchwald–Hartwig amination followed by an intramolecular annulation in a one-pot process. This