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how do i go about this mechanism? is it a cross aldol reaction?
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- Propose a mechanism for the following reaction, which is a synthesis of PEEK (see Section 26.6a.2).7. Complete the following reaction and propose a mechanism.The following reaction occurs at room temperature in acidic solution, first formingintermediate A, which then rearranges into final product B .i. Show the mechanism for the formation of Intermediate A. )ii. Show the mechanism for the rearrangement of A to B. Explain why the reaction does NOT occur readily in basic solution using your mechanism from 2.a
- 2. The following reactions are reversible. Propose a mechanism for the forward and reverse reactions.Scheme 1: Reagents: (a) acetic anhydride, sulfamic acid, 60°C,30min,91%; (b) Et3SiH,I2,0-5°C,30min,82%. 1) Draw the FULL, ARROW-PUSHING MECHANISM 2) Provide a verbalization of the mechanism for your reaction mechanism 3) What is happening at each step? What atom is nucleophilic? Which atom is electrophilic? Which bonds are made? Which bonds are broken? 4) Imagine you are trying to describe the reaction mechanism and I can't see your display - how would you describe the mechanism in a way that I know, that you know, what you are talking about.Boron tribromide (BBr3) cleaves ethers to give alkyl halides and alcohols.R¬O¬R′ + BBr3 ¡ R¬O¬BBr2 + R′BrR¬O¬BBr2 + 3 H2O ¡ ROH + B(OH)3 + 2 HBrThe reaction is thought to involve attack by a bromide ion on the Lewis acid–base adductof the ether with BBr3 (a strong Lewis acid). Propose a mechanism for the reaction ofbutyl methyl ether with BBr3 to give (after hydrolysis) butan-1-ol and bromomethane.
- The Baylis–Hillman reaction is a DABCO (1,4-diazabicyclo[2.2.2]octane) catalyzed reaction of an a,b-unsaturated carbonyl compound with an aldehyde to form an allylic alcohol. Propose a mechanism for the reaction. (Hint: DABCO serves as both a nucleophile and as a base in the reaction.)Propose a detailed mechanism for the reaction below (in the attached picture), showing the structure of thestable intermediate and using curved arrows to indicate electron flow in each stepThe Baylis–Hillman reaction is a DABCO (1,4-diazabicyclo[2.2.2]octane) catalyzed reaction of an a,b-unsaturated carbonyl compound with an aldehyde toform an allylic alcohol. Propose a mechanism for the reaction. (Hint: DABCO serves as both a nucleophile and as a base in the reaction.)