The major product (Z) of the following chemic | vedclass

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(C) The reaction involves the nucleophilic addition of the Grignard reagent,$PhMgBr$,to the carbonyl group of $5$-bromo-$2$-pentanone. $1$. The phenyl

Vedclass · Accepted Answer

$A$ cyclic ether with a five-membered ring containing a phenyl group and a methyl group at the same carbon.

Vedclass · Answer

(C) The reaction involves the nucleophilic addition of the Grignard reagent,$PhMgBr$,to the carbonyl group of $5$-bromo-$2$-pentanone. $1$. The phenyl group $(Ph^-)$ attacks the electrophilic carbonyl carbon of the ketone to form an intermediate alkoxide,$CH_3-C(OMgBr)(Ph)-CH_2-CH_2-CH_2Br$ (labeled as $P$). $2$. The alkoxide oxygen then performs an intramolecular nucleophilic substitution $(S_N2)$ on the carbon bearing the bromine atom,displacing the bromide ion and forming a five-membered cyclic ether ring. $3$. This results in the formation of $2$-methyl-$2$-phenyltetrahydrofuran as the major product $(Z)$.

The major product $(Z)$ of the following chemical reaction is

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