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Sourav posted an Question
September 12, 2020 • 16:01 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Darzon reaction is for alpha halo esters and carbonyl compounds na?

Darzon Reaction 60. Major product formed in the given reaction Br NaOEt OH : č-Ph OH QH Q Ph -C-Ph Br

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  • Suman Kumar best-answer

    yes Sourav

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    The Darzens reaction (also known as the Darzens condensation or glycidic ester condensation) is the chemical reaction of a ketone or aldehyde with an α-haloester in the presence of a base to form an α,β-epoxy ester,

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    and why does this rxn in qs given inside darzen

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    it's an application of the same

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    it is quite confusing being under darzen, there is no alpha ester

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    see you should keep in mind that you have to remove Br

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    And in the process epoxide has to form

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    which side ring opening of epoxide happen?

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    Read this

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    See the size of ring formation

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    4 membered from one side & 5 memberd from other side . Now you decide

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    Boddu rama krishna Best Answer

    option b

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    how

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    reaction proceeds with alpha halo ester via epoxide ring opening

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    but there is no ester na?

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    and why does ring opening from that side

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    reaction proceeds with alpha keto also...

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    here ring opening results give 5 numbered ring rather than strained 3 numbered ring (not possible)

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