Keywords
2-aryloxypyridines
C–O coupling
copper nanoparticles
rongalite
β-cyclodextrin.
Abstract
β-Cyclodextrin-stabilized Cu nanoparticles were prepared from CuSO4⋅5H2O using sodium hydroxymethanesulfinate (rongalite) as the reducing agent and β-cyclodextrin as the stabilizing agent. This nanocatalyst showed good catalytic activities in the C-O coupling of phenols with 2-bromopyridine providing 2-aryloxypyridines in moderate to good yields. The catalyst can be recovered and reused five times with slight decrease in its activity.
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