Practical Routes to 2,6-Disubstituted Pyridine Derivatives
作者:Lucie Vandromme、Hans-Ulrich Reißig、Susie Gröper、Jürgen P. Rabe
DOI:10.1002/ejoc.200701200
日期:2008.4
starting from readily available 2-substituted pyridines. The main sequence involves a selective α-lithiation reaction with halogen functionalization followed by a Grignard reaction catalyzed by Fe(acac)3. After demonstration of the easy feasibility of this strategy by synthesizing 2,6-disubstituted pyridines 1, the route was applied to obtain pyridine derivatives bearing electron-donating or electron-withdrawing