Chemistry of heterocyclic compounds. Part 80. .alpha.-Methyl functionalization of electron-poor heterocycles. Chloromethyl derivatives of 2,2'-bipyridines
作者:George R. Newkome、Wallace E. Puckett、Garry E. Kiefer、Vinod D. Gupta、Yuanjiao Xia、Mark Coreil、Melisa A. Hackney
DOI:10.1021/jo00142a022
日期:1982.10
Palladium-Catalyzed Directed Halogenation of Bipyridine <i>N</i>-Oxides
作者:Sina P. Zucker、Friedrich Wossidlo、Manuela Weber、Dieter Lentz、C. Christoph Tzschucke
DOI:10.1021/acs.joc.7b00444
日期:2017.6.2
The palladium-catalyzed directed C–H halogenation of bipyridine N-oxides was investigated. Using NCS or NBS (N-chloro- or N-bromosuccinimide) and 5 mol % Pd(OAc)2 in chlorobenzene (0.10 molar) at 110 °C, pyridine-directed functionalization took place and 3-chloro- or 3-bromobipyridine N-oxides were obtained in high yields. The reaction is sensitive to steric hindrance by 4- and 6′-substituents. Only