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(D) The synthesis of $2-$phenylpropene involves the following steps:$1.$ Formation of Grignard reagent: Bromobenzene reacts with $Mg$ in diethyl ether

Vedclass · Accepted Answer

$1.$ Bromobenzene $+ Mg$,diethyl ether; $2.$ Acetone $[(CH_3)_2C=O]$; $3.$ $H_3O^{+}$; $4.$ $H_2SO_4$,heat

Vedclass · Answer

(D) The synthesis of $2-$phenylpropene involves the following steps:$1.$ Formation of Grignard reagent: Bromobenzene reacts with $Mg$ in diethyl ether to form phenylmagnesium bromide $(PhMgBr)$.$2.$ Nucleophilic addition: $PhMgBr$ reacts with acetone $[(CH_3)_2C=O]$ to form an alkoxide intermediate.$3.$ Acidic workup: Addition of $H_3O^{+}$ yields $2-$phenylpropan$-2-$ol.$4.$ Dehydration: Heating $2-$phenylpropan$-2-$ol with $H_2SO_4$ causes dehydration to form $2-$phenylpropene.

Which sequence of steps describes the best synthesis of $2-$phenylpropene?

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