Textbook Question
Identify the alkene and alcohol partners that could be used to make the following ethers.
(c)
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12. Alcohols, Ethers, Epoxides and Thiols
Making Ethers - Acid-Catalyzed Alkoxylation
4:08 minutesProblem 53a
Textbook Question
Show how each of the following compounds can be synthesized from an alkene:
a. 
Verified step by step guidance1
Step 1: Identify the target compound structure. The given compound is 2-methoxy-2-methylpropane, which contains an ether functional group (-OCH3) attached to a tertiary carbon.
Step 2: Choose an appropriate alkene precursor. The alkene precursor for this synthesis is 2-methylpropene (CH3C(CH3)=CH2), as it contains the correct carbon skeleton for the target compound.
Step 3: Select the reaction type. To synthesize an ether, use an electrophilic addition reaction involving an alcohol (methanol, CH3OH) and an acid catalyst (such as H2SO4). This reaction is known as the acid-catalyzed addition of alcohol to an alkene.
Step 4: Describe the mechanism. In the presence of an acid catalyst, the alkene undergoes protonation to form a carbocation intermediate. Since 2-methylpropene forms a tertiary carbocation, it is highly stable. Methanol then acts as a nucleophile and attacks the carbocation, forming the ether bond.
Step 5: Finalize the synthesis. After the nucleophilic attack, the product is deprotonated to yield the final compound, 2-methoxy-2-methylpropane. Ensure proper reaction conditions (temperature, solvent, and catalyst) to optimize the yield.
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Video duration:
4mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Alkene Reactivity
Alkenes are unsaturated hydrocarbons characterized by at least one carbon-carbon double bond. Their reactivity is primarily due to this double bond, which can undergo various reactions such as electrophilic addition, oxidation, and polymerization. Understanding the types of reactions that alkenes can participate in is crucial for synthesizing other compounds from them.
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Synthesis Pathways
Synthesis pathways refer to the step-by-step methods used to convert one compound into another. In organic chemistry, this often involves a series of reactions, including functional group transformations and rearrangements. Identifying the appropriate synthesis pathway from an alkene to the desired compound requires knowledge of reaction mechanisms and the properties of intermediates.
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Functional Group Transformations
Functional group transformations involve changing one functional group in a molecule to another, which is essential in organic synthesis. For example, alkenes can be converted into alcohols, halides, or carbonyl compounds through various reactions. Mastery of these transformations allows chemists to design synthetic routes to create complex molecules from simpler alkenes.
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