(a)
Interpretation: The two different methods to carry out the given transformation; a one-step method using a Wittig reaction, and a two-step method using a Grignard reagent are to be stated and the preferred route is to be identified.
Concept introduction: The Wittig reaction is always preferred for the synthesis of
(b)
Interpretation: The two different methods to carry out the given transformation; a one-step method using a Wittig reaction, and a two-step method using a Grignard reagent are to be stated and the preferred route is to be identified.
Concept introduction: The Wittig reaction is always preferred for the synthesis of alkene rather than other elimination reactions. The mostly elimination methods generally gives mixture of constitutional isomers, through
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Chapter 21 Solutions
Organic Chemistry-Package(Custom)
- Provide all possible products formed in the given reaction Draw the products formed when each ether is treated with two equivalents of HBr.arrow_forwardDraw the products when each pair of compounds is treated with CH3CH2O−, CH3CH2OH in a Robinson annulation reaction.arrow_forwardDraw a stepwise mechanism for the following reaction.arrow_forward
- Draw two different routes to each of the attached ethers using aWilliamson ether synthesis. Indicate the preferred route (if there is one).arrow_forwardShow two methods to synthesize each alkene: a one-step method using a Wittig reagent, and a two-step method that forms a carbon–carbon bond with an organometallic reagent in one of the steps.arrow_forwardDevise a synthesis of each compound using 1-bromobutane(CH3CH2CH2CH2Br) as the only organic starting material. You may useany other inorganic reagents.arrow_forward
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