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Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
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Tutti i libri di testoMullins 1st EditionCh. 13 - Alcohols, Ethers and Related Compounds: Substitution and EliminationProblema 106o(v,vi)
Capitolo 12, Problema 106o(v,vi)

Predict the product(s) that would result when molecules (a)–(p) are allowed to react under the following conditions: (v) 1. TsCl, Et₃N 2. NaOt-Bu (vi) H₂SO₄ If no reaction occurs, write 'no reaction.'
(o) Chemical structure of a phenol with a hydroxyl group attached to a carbon chain.

Guida verificata passo dopo passo
1
Identify the functional group in the given molecule. The structure shows a secondary alcohol attached to a benzene ring.
Consider the first set of reaction conditions: 1. TsCl, Et₃N. This step involves converting the alcohol into a tosylate, which is a good leaving group.
In the presence of TsCl (tosyl chloride) and Et₃N (triethylamine), the hydroxyl group (OH) is replaced by a tosylate group (OTs), making the molecule more reactive for the next step.
Consider the second step: NaOt-Bu. This is a strong, bulky base that typically promotes elimination reactions, leading to the formation of an alkene through an E2 mechanism.
For the second set of reaction conditions: H₂SO₄, this is a strong acid that can protonate the alcohol, leading to dehydration and formation of an alkene through an E1 mechanism. Analyze the structure to determine the most stable alkene product.

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Reactivity of Alcohols

Alcohols can undergo various reactions depending on their structure and the reagents used. In the presence of TsCl (tosyl chloride) and a base like Et₃N (triethylamine), alcohols can be converted into better leaving groups, facilitating nucleophilic substitution or elimination reactions. Understanding the reactivity of alcohols is crucial for predicting the products of these reactions.
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Nucleophilic Substitution Reactions

Nucleophilic substitution reactions involve the replacement of a leaving group by a nucleophile. The mechanism can be either SN1 or SN2, depending on the substrate and conditions. In this context, the use of NaOt-Bu (sodium tert-butoxide) suggests a strong base that can promote elimination or substitution, making it essential to determine the likely pathway and product.
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Acid-Catalyzed Reactions

Acid-catalyzed reactions, such as those involving H₂SO₄ (sulfuric acid), often facilitate the formation of carbocations or activate substrates for further reactions. In organic synthesis, acids can promote dehydration of alcohols or rearrangements, which can lead to different products. Recognizing the role of acids in these reactions is vital for predicting outcomes.
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