Regio- and Chemoselective Addition of Mixed Copper, Zinc Benzylic Organometallics to Functionalized Pyridinium Salts: A Facile Synthesis of Functionalized 4-Benzylpyridines
Regio- and Chemoselective Addition of Mixed Copper, Zinc Benzylic Organometallics to Functionalized Pyridinium Salts: A Facile Synthesis of Functionalized 4-Benzylpyridines
2′,3-Disubstituted 4-benzylpyridines 4 were synthesized in good yield by reaction of mixed copper, zinc benzylic organometallics 1 with 3-substituted 1-(ethoxycarbonyl)pyridinium chlorides 2 followed by sulfur oxidation under reflux in decalin.