CuI/Oxalamide Catalyzed Couplings of (Hetero)aryl Chlorides and Phenols for Diaryl Ether Formation
作者:Mengyang Fan、Wei Zhou、Yongwen Jiang、Dawei Ma
DOI:10.1002/anie.201601035
日期:2016.5.17
Couplings between (hetero)arylchlorides and phenols can be effectively promoted by CuI in combination with an N‐aryl‐N′‐alkyl‐substituted oxalamide ligand to proceed smoothly at 120 °C. For this process, N‐aryl‐N′‐alkyl‐substituted oxalamides are more effective ligands than bis(N‐aryl)‐substituted oxalamides. A wide range of electron‐rich and electron‐poor aryl and heteroaryl chlorides gave the corresponding
A Direct C2-Selective Phenoxylation and Alkoxylation of Quinoline <i>N</i>
-Oxides with Various Phenols and Alcohols in the Presence of <i>H</i>
-Phosphonate
A practical and efficient method for the synthesis of 2-aroxy(alkoxy)quinolines has been developed, via direct cross-dehydrogenativecoupling reaction between quinoline N-oxides and readily available phenols and alcohols in the presence of H-phosphonate and CCl4 under mild conditions.
Green and fast 2-aryloxylation/amination of quinolines
作者:Changna Bu、Kaijuan Wang、Chengcheng Gong、Dong Wang
DOI:10.1039/d3gc05178a
日期:——
activating agent-promoted deoxygenative aryloxylation/amination. The main challenges in constructing C2–O or C2–N bonds from N-oxides lie in overcoming two side reactions: the reaction between the activating agent and the nucleophile, and the associated reaction at the C4-position. Compared to previous reports, this method benefits from an eco-friendly solvent, short reaction time, simple operation, and wide
A microwave-assisted metal- and ligand-free direct O-arylation of quinolones has been achieved by employing easily accessible diaryliodonium salts in the presence of a base to afford various aryloxyquinolines in good yields. The operationally simple and rapid protocol has also been utilized for the construction of biologically important benzofuro[3,2-c]quinolines.