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- Write a mechanism for the reaction below. Hint: think retro!Give a step-by-step mechanism for the following substitution reactions: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.
- (a) Propose a plausible mechanism for the reaction given below: (b) Show a plausible step by step synthesis scheme for each of the following transformations:Provide a structure for the major products of the reactions and include the steps for each reaction.Propose a mechanism for the following reactions. Use an appropriate organic chemistry software (e.g. chemsketch, chemdraw, etc.) to draw the structures and mechanism. Explain it.
- Propose a mechanism for the reaction in Question2.1.3.Enamines formed from the cyclic secondary amine pyrrolidine are important intermediates in the synthesis of 1,5-diketones. (1st pic) On the structures provided below, draw arrows showing electron flow for the reaction mechanism for the acetic acid-catalyzed formation of an enamine from cyclohexanone and pyrrolidine. (2nd pic)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 step
