From Aldehydes Aldehydes can be prepared from alkanes through the reaction with hydrogen cyanide and acid catalyst. Method 2: From Ketones Ketones can be...
From Aldehydes**
Aldehydes can be prepared from alkanes through the reaction with hydrogen cyanide and acid catalyst.
Method 2: From Ketones
Ketones can be obtained from aldehydes by treating them with sodium borohydride in water.
Method 3: From Carboxylic Acids
Carboxylic acids can yield aldehydes and ketones through the reaction with catalytic hydrogenation.
Method 4: From Aldehydes and Ammonia
In a classic experiment, aldehydes can be oxidized to ketones with ammonium hydroxide and acid catalyst.
Method 5: From Acetanilide
Acetanilide, an aromatic aldehyde, can be reduced to the corresponding ketone using sodium borohydride.
Method 6: From Benzaldehyde
Benzaldehyde can undergo electrophilic addition with bromine and potassium hydroxide to form 2-bromobenzaldehyde, which can be dehydrated to benzaldehyde.
Method 7: From 2-Methylpropanal
Treatment of 2-methylpropanal with aqueous sodium hydroxide and acid results in the formation of the ketone 2-methylpropanone.
These methods illustrate the various methods used to prepare aldehydes and ketones, highlighting the importance of choosing the appropriate method based on the starting aldehyde or ketone and the desired product