Interpretation:
The correct product should be identified for the given [1, 3] sigmatropic rearrangement reaction.
Concept introduction:
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigmatropic rearrangement reactions are designated with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.
[3,3] sigmatropic rearrangement of a 1,3-diene known as Cope rearrangement reaction.
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for sigmatropic rearrangement reactions are listed below
Carbon migrating with one lobe of its p orbital interacting
Carbon migrating with both lobe of its p orbital interacting
of configuration is the inversion of a chiral center in a molecule in a
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Organic Chemistry (8th Edition)
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- addition of hbr to a double bond with an ether (-or) substituent occurs regiospecifically to give a product in which the Br OR are bonded to the same carbon. Draw the two possible carbocation intermediates in this electrophilic addition reaction,and explain using resonance why the observed product is formed.arrow_forwardGiven that an E2 reaction proceeds with anti periplanar stereochemistry, draw the products of each elimination. The alkyl halides in (a) and (b) are diastereomers of each other. How are the products of these two reactions related? Recall from Section 3.2A that CgHs- is a phenyl group, a benzene ring bonded to another group. "OCH,CH, b. CgHgC CH Br OCH,CH3 a. Brarrow_forward3) Explain how and why the reaction below results in the observed regiochemistryand/or stereochemistry.arrow_forward
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