Aldehydes react in a disproportionation reaction in the presence of rhodium
catalysts to yield amines and amides. By adding N-methylmorpholine N-oxide
as an oxidant in the presence of catalytic amounts of rhodium, the oxidati
ve amination of aldehydes proceeds selectively to give the corresponding am
ide. Both aliphatic and aromatic aldehydes react with secondary amines to y
ield carboxylic acid amides in good to excellent yields.