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- A problem often encountered in the oxidation of primary alcohols to acids is that esters are sometimes produced as by-products. For example, oxidation of ethanol yields acetic acid and ethyl acetate: Propose a mechanism to account for the formation of ethyl acetate. Take into account the reversible reaction between aldehydes and alcohols:) Provide a reaction mechanism for the following reactions and name the major product for each. HBr H,SO4 HO,4. Aldehydes and ketones can be “protected" as acetals and ketals. Complete the following outlined reactions, showing how the protection is accomplished, and what results after deprotection. MgCI 1) 2) HO* deprotection here
- * Predict the products and stereochemistry for the following reduction reaction NaBH4 (a) EtOH H2 Lindlar catalyst (b) 3-Hexyne (c) 3-Hexyne (d) CEC H2 Ni₂B (P-2) Na NH3Q17. Compound 1 can undergo an intramolecular reaction to give cyclic product 2. Using curly arrows, show the mechanism of this reaction – note that the mechanism involves more than one elemental step - and draw the structure of 2; chemical formula is provided as guidance. H2N. C5H9NO CH;OH 2What is the expected product of the following reaction ? & 1) LDA 2) CH3CH₂CH₂Br & &
- Provide the products for the below reactions: H9SO4 H,SO4 ВНЗ, ТHF H2O2, OH", H2Ob) Listed below are several hypothetical nucleophilic substitution reactions. None is synthetically useful because the product indicated is not formed at an appreciable rate. In each case provide an explanation for the failure of the reaction to take place as indicated. OMe HO + OMe + OH HO + CH; OHProvide the curved-arrow mechanism to account for the following nucleophilic addition reaction. H20 EN NaOH NH2
- A ketone undergoes acid-catalyzed bromination, acid-catalyzed chlorination, racemization, (see page 408)and acid-catalyzed deuterium exchange at the a-carbon. All of these reactions have similar rate constants.What does this tell you about the mechanisms of these reactions?47) Provide the structure of the major organic product which results in the following reaction. CH₂ Br KI 48) When 1-iodo-1-methylcyclohexane is treated with NaOCH2CH3, the more highly substituted alkene product predominates. When KOC(CH3)3 is used instead, the less highly substituted alkene product predominates. Offer an explanation.a) Provide a mechanism that accounts for the product formed in the following reaction. OH CH H" ► 1-ethoxy-1-methyleyclohexane + CH,CH,OH b) Show the structure of the product(s) formed in the following reaction and write the mechanism for the reaction. OH CH + (CH;);COH