The mechanism for the rearrangement reaction of cyclohexa − 1 , 4 − diene into cyclohexa − 1 , 3 − diene in the presence of an acidic solution along with the reason of energetically favourable reaction. Interpretation: The mechanism for the rearrangement reaction of cyclohexa − 1 , 4 − diene into cyclohexa − 1 , 3 − diene in the presence of an acidic solution is to be proposed and the reason corresponds to the statement that is why the reaction is energetically favourable to be explained. Concept introduction: Tautomerization is the process in which molecular formula of compounds remain same but connectivity of atoms or substituents in compounds become different. The stability of compound is the major factor that determines the formation of a compound. The compounds that have low energy are energetically favourable. Conjugated systems possess alternate single and double bonds that results in lower energy of molecule and increase in stability of a molecule.

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Protecting Groups and Carbonyls 6) The synthesis generates allethrolone that exhibits high insect toxicity but low mammalian toxicity. They are used in pet shampoo, human lice shampoo, and industrial sprays for insects and mosquitos. Propose detailed mechanistic steps to generate the allethrolone label the different types of reagents (Grignard, acid/base protonation, acid/base deprotonation, reduction, oxidation, witting, aldol condensation, Robinson annulation, etc.) III + VI HS HS H+ CH,CH,Li III I II IV CI + P(Ph)3 V ༼ Hint: no strong base added VI S VII IX HO VIII -MgBr HgCl2,HgO HO. isomerization aqeuous solution H,SO, ༽༽༤༽༽ X MeOH Hint: enhances selectivity for reaction at the S X ☑

Answer 1

Question

Chapter 15.2, Problem 15.2P

Interpretation Introduction

To determine: The mechanism for the rearrangement reaction of cyclohexa−1,4−diene into cyclohexa−1,3−diene in the presence of an acidic solution along with the reason of energetically favourable reaction.

Interpretation: The mechanism for the rearrangement reaction of cyclohexa−1,4−diene into cyclohexa−1,3−diene in the presence of an acidic solution is to be proposed and the reason corresponds to the statement that is why the reaction is energetically favourable to be explained.

Concept introduction: Tautomerization is the process in which molecular formula of compounds remain same but connectivity of atoms or substituents in compounds become different. The stability of compound is the major factor that determines the formation of a compound. The compounds that have low energy are energetically favourable.

Conjugated systems possess alternate single and double bonds that results in lower energy of molecule and increase in stability of a molecule.

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Protecting Groups and Carbonyls 6) The synthesis generates allethrolone that exhibits high insect toxicity but low mammalian toxicity. They are used in pet shampoo, human lice shampoo, and industrial sprays for insects and mosquitos. Propose detailed mechanistic steps to generate the allethrolone label the different types of reagents (Grignard, acid/base protonation, acid/base deprotonation, reduction, oxidation, witting, aldol condensation, Robinson annulation, etc.) III + VI HS HS H+ CH,CH,Li III I II IV CI + P(Ph)3 V ༼ Hint: no strong base added VI S VII IX HO VIII -MgBr HgCl2,HgO HO. isomerization aqeuous solution H,SO, ༽༽༤༽༽ X MeOH Hint: enhances selectivity for reaction at the S X ☑

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