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    Got stuck on figuring out the mechanism for this one reaction, as attached.

    I got to the part where silicon enolate is formed after deprotonation.
    I know Zn-Cu(what is this) and CH2I2 generates the carbene CH2, though wasn't sure on the mechanism for this generation of carbene.

    After that, I couldn't get the spiro compound as required, that is the main part I struggled on really. Please show me how this could be achieved, or at least tell me what would happen.

    Thanks.
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    I assume thats an enone as the starting material and the product is bicyclic?

    Have a look at the Simmons–Smith reaction for the second step after you've formed the TMS enolate
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    (Original post by EierVonSatan)
    I assume thats an enone as the starting material and the product is bicyclic?

    Have a look at the Simmons–Smith reaction for the second step after you've formed the TMS enolate
    Lovely, thanks so much! It is much easier when i know what named reactions i am supposed to be looking for.
 
 
 

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