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Q.
Which of the following reactions is/are correct regarding the preparation of ketone?
Aldehydes Ketones and Carboxylic Acids
Solution:
Treatment of acyl chlorides with dialkyl cadmium, prepared by the reaction of cadmium chloride with Grignard reagent, gives ketones.
$2 R- Mg -X+ CdCl _{2} \longrightarrow R_{2} Cd +2 Mg (X) Cl $
$2 R^{\prime}- COCl +R_{2} Cd \longrightarrow 2 R^{\prime}- COR + CdCl _{2}$
Treating a nitrile with Grignard reagent followed by hydrolysis yields a ketone.
When benzene or substituted benzene is treated with acid chloride in the presence of anhyd. $AlCl _{3}$ it gives the corresponding ketone. This reaction is known as Friedel-Craft, acylation reaction.
