acid amides. NH + H + HCl Cl Acetyl chloride NH Ammonia Acetamide ) Reaction with o and o Amines gives N-alkyl amides . R NHR' + H + HCl R Cl NHR' N-alkylamide o amine R NR' + H + HCl R Cl NR' N,N-dialkylamide o amine ( ) Reduction. (a) When reduced with hydrogen in the presence of ‘poisoned’ palladium catalyst, they form aldehydes.
This reaction is called Rosenmund reduction. We have already learnt this reaction under the preparation of aldehydes + H + HCl Cl Acetyl chloride Pd - BaSO Acetaldehyde [H] (b) When reduced with LiAlH gives primary alcohols. Cl + (H) LiAlH OH + HCl Ethyl alcohol . .
Acid anhydride Methods of preparation . Heating carboxylic acid with P O We have already learnt that when carboxylic acids are heated with P O dehydration takes place to form acid anhydride. XII U12-Carbonyl XII U12-Carbonyl - - - - . By reaction of acid halide with a salt of carboxylic acids.
Acid chlorides on heating with sodium salt of carboxylic acids gives corresponding anhydride. Cl Na + NaCl Sodium acetate Acetic anhydride Acetylchloride