Reaction of one equivalent of a Grignard reagent with an ester results in a ketone.

Name: Reaction of one equivalent of a Grignard reagent with an ester results in a ketone.
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Reaction of one equivalent of a Grignard reagent with an ester leads to a tertiary alcohol, not a ketone. The Grignard reagent first reacts with the ester to form a ketone intermediate, which then reacts with a second equivalent of the Grignard reagent to give the tertiary alcohol.

Reaction of One Equivalent of a Grignard Reagent with an Ester