ACID-AMIDES, chemical compounds which may be considered as derived from ammonia by replacement of its hydrogen with acidyl residues, the substances produced being known as, primary, secondary or tertiary amides, according to the number of hydrogen atoms replaced.
Of these compounds, the primary amides of the type Rï¿½COï¿½NH 2 are the most important.
By the action of bromine and alcoholic potash on the amides,, they are converted into amines containing one carbon atom less than the original amide, a reaction which possesses great.
On the preparation of the substituted amides from the corresponding sodamides see A.
The secondary and tertiary amides of the types (RCO) 2 NH and (RCO) 3 N may be prepared by heating the primary amides or the nitriles with acids or acid anhydrides to 200° C. Thiamides of the type R.