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
Copper-Catalyzed Diaryl Ether Formation from (Hetero)aryl Halides at Low Catalytic Loadings
作者:Yuntong Zhai、Xiaofei Chen、Wei Zhou、Mengyang Fan、Yisheng Lai、Dawei Ma
DOI:10.1021/acs.joc.7b00493
日期:2017.5.5
Diaryl formation is achieved by coupling phenols and (hetero)aryl halides under the catalysis of CuI/N,N′-bis(2-phenylphenyl) oxalamide (BPPO) or CuI/N-(2-phenylphenyl)-N′-benzyl oxalamide (PPBO) at 90 °C using DMF or MeCN as the solvent. Only 0.2–2 mol % CuI and ligand are required for complete conversion, which represents the lowest catalytic loadings for a general Cu/ligand-catalyzed diaryl ether
The present invention relates to tetrahydronaphthyridine derivatives of the general formula (I):
or of the general formula (I′)
in which A and R
1
are as defined within, and to processes for the preparation of, intermediates used in the preparation of, compositions containing and the uses of, including the treatment diseases mediated by H3 ligands, in particular inflammatory, allergic and respiratory diseases, disorders and conditions.