The conversion,PhCN to PhCOCH_3,can be achiev | vedclass

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Question

(A) The reaction of a nitrile $(PhCN)$ with a Grignard reagent $(CH_3MgBr)$ followed by acid hydrolysis is a standard method for the synthesis of keto

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$CH_3MgBr$ followed by hydrolysis

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(A) The reaction of a nitrile $(PhCN)$ with a Grignard reagent $(CH_3MgBr)$ followed by acid hydrolysis is a standard method for the synthesis of ketones.Step $1$: The nucleophilic $CH_3^-$ group from $CH_3MgBr$ attacks the electrophilic carbon of the nitrile group $(Ph-C \equiv N)$ to form an imine magnesium salt intermediate,$Ph-C(CH_3)=NMgBr$.Step $2$: Subsequent acid hydrolysis $(H_3O^+)$ of the imine intermediate yields the ketone,$PhCOCH_3$.

The conversion,$PhCN \to PhCOCH_3$,can be achieved most conveniently by reaction with

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