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- (a) Provide a detailed mechanism for the reaction shown below. Br2/H20 HO. Br(b) Synthesize the following compounds from acetylene and any alkyl halides with four or fewer carbons. Note that more than one step may be required. HC=CH CH3CH2CH2CCH2CH2CH2CH3The reaction below could run through both substitution and elimination reactions. 1. Provide the correct reagent to produce the products shown 2. State which mechanism(s) was followed
- Describe a sequence of reactions by which 2-hexyne can be prepared from acetylene while minimizing the number of steps required. O 1. NANH2; 2. CH3CH2CH2Br; 3. NaNH2; 4. CH3B1 O 1. NANH2: 2. CH3Br; 3. CH3CH2CH2B1; O 1. NANH2; CH3Br; 3. NANH2; 4. CH3CH2CH2B O A or B O A or CHow is the mechanism for oxymercuration/demercuration reactions of alkenes understood? How are the (Markovnikov) products predicted and what reagents would you need to use to incorporate this reaction into a multistep synthesis strategy. Finally, what makes this a potentially more useful way to synthesize alcohols from alkenes than simple acid hydration?H. H ÔMe Ph;P LIAIH4 compound a compound b HO. Bombykol C16H300 The above reaction scheme presents one possible synthesis of the compound. Work out the synthesis on a separate sheet of paper, and then draw the structure of compound b. Consider E/Z stereochemistry of alkenes. Do not show stereochemistry in other cases.
- In both examples below the reactants shown are combined to bring about a nucleophilic substitution (SN1, SN2) and/or elimination (E1, E2) reaction. What is the major reaction that takes place in each case?Represent a structure of product A (bicyclic molecule) and propose a detailed mechanism for its preparation.Synthesize Chloramphenicol from Toluene or Benzaldehyde. Draw and explain step by step please.(p.s: if you can, can you write what the reagents does?) (Drug Chemistry)
- Give a synthesis to convert the reactants into the shown products using an HCN reaction and other reactions(image attached).2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: i) ii) iv) bigg Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.Show how m-dibromobenzene can be synthesized from benzene from multiple reactions. Tip: think of diazotation as an important reaction in this process.