Highly Reactive, Single-Component Nickel Catalyst Precursor for Suzuki-Miyuara Cross-Coupling of Heteroaryl Boronic Acids with Heteroaryl Halides
作者:Shaozhong Ge、John F. Hartwig
DOI:10.1002/anie.201207428
日期:2012.12.14
One for all: The coupling of a range of nitrogen‐ and sulfur‐containing heteroaryl halides with five‐membered nitrogen‐, oxygen‐, and sulfur‐containing heteroaryl boronic acids were achieved in high yields with only 0.5 mol % of the single‐component nickel precatalyst [(dppf)NiCl(cinnamyl)] (dppf=1,1′‐bis(diphenylphosphanyl)ferrocene). The reaction demonstrates good functional group compatibility,
C3‐Cyanation of Pyridines: Constraints on Electrophiles and Determinants of Regioselectivity
作者:Ming Zhang、Qingyang Zhou、Heng Luo、Zi‐Lu Tang、Xiufang Xu、Xiao‐Chen Wang
DOI:10.1002/anie.202216894
日期:2023.2
C3-selective cyanation of pyridines was accomplished by a tandem process of borane-catalyzed pyridine hydroboration, substitution of the resulting dihydropyridine with a cyano electrophile, and finally oxidative aromatization. This method was suitable for use in late-stage cyanation of pyridine drugs.