21.26 Identify the reagents that you would use to produce each of the following compounds using a Claisen condensation: علمه (a) (c) O COOMe OEt (b) (d) OEt COOMe

Q: Draw an alkyl bromide that can be used to synthesize the given alkene as the major product via an E2…

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A: ---------------------------------

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Q: 6. For each molecular formula below, draw a valid Lewis structure (bond-line structure also fine).…

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A:

Q: КОН A PHCH,Br (RNH), 21. NH aq aq Ethanol PHCH,NH, + C C=O

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Reactions at the Alpha Carbon Atom

The position next to the ketone or aldehyde functional group is termed as alpha position and the reaction which occurs at alpha position is called alpha substitution reaction. In an alpha substitution reaction, the alpha proton atom is substituted by an electrophile by the formation of an enol intermediate or enolate ion intermediate. Most of the carbonyl compounds go through an alpha substitution reaction.