Bromopyridine 4 was converted into aminopyridine 5 under Cu2O catalysis wit
h an ethylene glycol solution of ammonia in excellent yield (90%). The amin
ation reaction features low (0.5 mol%) catalyst loading, mild reaction temp
erature (80 degreesC) and low reaction pressure (50 psi). This protocol is
further studied in the amination of a variety of aryl halides. (C) 2001 Els
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