Identify the major product from the following | vedclass

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(C) The reaction proceeds in three steps:$1$. Nucleophilic addition of the Grignard reagent $(CH_3MgCl)$ to the carbonyl group of $2,2,5,5$-tetramethy

Vedclass · Accepted Answer

$1,2,2,5,5-$pentamethylcyclopentene

Vedclass · Answer

(C) The reaction proceeds in three steps:$1$. Nucleophilic addition of the Grignard reagent $(CH_3MgCl)$ to the carbonyl group of $2,2,5,5$-tetramethylcyclopentanone,followed by acid workup $(H_3O^+)$,yields $1,2,2,5,5$-pentamethylcyclopentanol.$2$. The subsequent treatment with $20\% \ H_3PO_4$ at $358 \ K$ causes acid-catalyzed dehydration of the tertiary alcohol.$3$. Dehydration occurs via the formation of a carbocation,followed by the loss of a proton to form the most stable alkene. In this case,the double bond forms between the $C_1$ and $C_2$ positions to give $1,2,2,5,5$-pentamethylcyclopentene.

Identify the major product from the following reaction sequence.

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