Help me with understanding this. Section B: Sigmatropic reactionsShade the circle for the correct phenol product resulting from the following Claisenrearrangement. Additionally, complete the arrow-pushing mechanism below to show howthe desired product is formed.OHОMechanism:OH[3,3]-sigmatropic shiftA?оOHOHоCyclohexadienoneIntermediateTautomerizationProduct

Step 1: ReactionClaisen rearrangement observed in Allyl Aryl ether give ortho Allyl phenol as major…

Answered: Section B: Sigmatropic reactions Shade…

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter23: Carbonyl Condensation Reactions

Section23.SE: Something Extra

Problem 73AP

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CH3 NH3, H* H3C H3C CH: Substituted pyrroles are often prepared by treatment of a 1,4-diketone with ammonia in the presence of catalytic H*. The mechanism involves the following steps: 1) Protonation of the carbonyl oxygen and nucleophilic attack by ammonia form tetrahedral intermediate 1; 2) Proton transfer leads to protonated carbinolamine 2; 3) B-elimination leads to enamine 3; 4) Protonation of the carbonyl oxygen and nucleophilic attack by the amine form tetrahedral intermediate 4; 5) Proton transfer leads to protonated carbinolamine 5; 6) B-elimination leads to the final product. Write out the reaction mechanism on a separate sheet of paper, and then draw the structure of tetrahedral intermediate 4. • You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Do not include lone pairs in your answer. ZI
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1 20 What sequence of reactions will accomplish the following synthetic transformation? & A CO,H LiAlH4 B LiAlH4 H/H₂O H/H₂O CrO 3/Ht D HO-CH₂-CH₂-OH, H+ C NaBH4 HO-CH,CH)-OH, H* -CH₂-OH CH3-CH₂-OH, H+ LiAlH4 H₂O/OH H₂O2 H/H₂O OH (aq)
Identify the reagents nacessary to accomplish cach of the following transformations. Choose the correct reagents from the following list: CH;CH;COCI, AICI, Fuming H3SO4 CH:CH;CI, AICla SOCI, Pyridine dilute H,S0. Zn(H, HCI, heat (CH:)2CHC, AICI; HNO, HaSO4 Enter the correct letter for sach stap of the reaction in the boxes below. (Reagents con be usad more than once) Step A: Step B: Step C:
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V. @Given the following mechanism fer me Y OCHS NaOH reaction show the detailed conversion of A to B •OCN3 CH3OH. OH (A) (B) c Ⓒ using the same detailed mechanism instead of cyclonexare ring as shown in product. B, propose and fer a product wil a cyclopentane ning instead of a cyclohexane viny. Ⓒ Exploumpand I with why campand (B) is preferred over the campanay campand with a cyclopentake ring..
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