Tetrahedron p. 1289 - 1298 (1998)
Update date:2022-08-10
Topics:
Gosmini, Corinne
Lasry, Sarah
Nedelec, Jean-Yves
Perichon, Jacques
2-Arylpyridines can be obtained in good to high yields by electrochemical reductin using the sacrificial anode process and catalysis by nickel-2,2'-bipyridine (bpy) complexes. In a first approach functionalized arylzinc species are prepared in DMF as solvent by electrolytic reduction of the corresponding aryl-bromides or -chlorides in the presence of ZnBr2 and Ni(II)-bpy complexes and then coupled with 2-chloropyridine. In a second approach the cross-coupling occurs from the electrochemical reduction of a stoichiometric mixture of an aryl halide and 2-halopyridine in DMF in the presence of NiBr2bpy as catalyst.
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