Conversion of carboxylic acids to amides under the action of tantalum(V) chloride
It was found that the reaction of aliphatic carboxylic acids with secondary amines under the action of tantalum (V) chloride leads to the selective formation of carboxamides. N,N-Diethyladamantane-1-carboxamide were synthesized with a yield of 73% as well.
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