Highly Ortho-Selective Cross-Coupling of Dichlorobenzene Derivatives with Grignard Reagents
作者:Shunpei Ishikawa、Kei Manabe
DOI:10.1021/ol702646s
日期:2007.12.1
Highly ortho-selective cross-coupling of dichlorobenzene derivatives with Grignard reagents was realized using a combination of Pd-2(dba)(3) and PCy3. Use of hydroxylated terphenylphosphines further improved the reactions of dichlorophenol and dichloroaniline.
One‐pot Cascade Reaction for the Synthesis of Phenanthridines via Suzuki Coupling/C−H Oxidation/Aromatization
作者:Yi Zhang、Yuxin Ding、Rener Chen、Yongmin Ma
DOI:10.1002/adsc.202000949
日期:2020.12.22
A one‐pot cascade coupling/annulation reaction for the synthesis of phenanthridines has been developed from arylboronic acids and o‐bromo arylamides with DMSO as a carbon source. The desired phenanthridines were obtained in moderate to good yields by using simple procedure.
Synthesis of Substituted Monohalobenzenes via Ortho-Selective Cross-Coupling of Dihalobenzenes with Electron-Donating Ortho-Directing Groups
作者:Kei Manabe、Shunpei Ishikawa
DOI:10.1055/s-2008-1067270
日期:2008.10
Dihalobenzenes that possess directing groups such as OH, CH 2 OH, NH 2 , NHAc, or NHBoc were subjected to ortho-selective cross-coupling with Grignard reagents in the presence of palladium-based catalysts to give the corresponding substituted monohalobenzenes. For the dibromo- and dichlorophenols and anilines, hydroxylated terphenylphosphines 1 and 2 were found to be effective ligands for palladium