Addition of Grignard reagents to aldehydes to give secondary alcohols

by James

Description: Addition of a Grignard reagent to an aldehyde results in a new C–C bond an a secondary alcohol after addition of acid.
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{ 4 comments… read them below or add one }

Rajarshi Banerjee

Shouldn’t the last example be a ten member-ed ring, if not what could be the mechanism

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james

No, it’s an intramolecular reaction to give a 5 membered ring.

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Rajarshi Banerjee

so the grignard will be a part of the aldehyde and then it will attack the carbon double bonded to the oxygen

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Brian Butler

The Mg adds by oxidative insertion to the Br to form the Grignard. Then, that reacts with the carbonyl carbon – yes.

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