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Sourav posted an Question
September 13, 2020 • 15:27 pm 30 points
  • IIT JAM
  • Chemistry (CY)

This is mcq

2 Answer(s) Answer Now
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  • Suman Kumar Best Answer

    see the mechanism for option C

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    See this mechanism for option B

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    I wrote option C by mistake please correct that

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    Stork enamine reaction is a name reaction just as other name reaction you do study

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    Sourav see this

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    Are you there Sourav

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    asie hota hai kya sir?

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    see this

  • Suman Kumar

    option A & B is correct

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    why not c and d

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    Because NaH will form stable enolate i.e it will abstract proton from methyl carbon

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    CH3li will react with ketone to form 3⁰ alcohol

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    sir b mai kaise hoga?

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    It is application of stork enamine reaction

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    woh kya hota hai

  • comment-profile-img>
    Boddu rama krishna best-answer

    option a

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    its mcq sir

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    kinetically controlled product obtained

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    sir can you explain why B?

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    wait sourav

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    sir.. im asking about B

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    option b mechanism i wrote sourav..

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    b is thermodynamically controlled product..

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    sir b reagent is different from your explanation.. Kindly check

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    ok

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    sorry

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    check it sourav..

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    but sir answer is given that reagent b forms product by forming kinetically stable product.

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    LDA is strong and hindered base...abstract proton from less hindered (less substituted enolate) of the carbon..and futher further reacted with phch2br alkylation takesplace that carbon only...this is kinitically controlled product..reaction occur at low temperature only

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    option A is correct

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    whereas in b..more substitued enolate formed (see the Stark enamine reaction) ..

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