Ch.11 - Reactions of Alcohols

Wade9th EditionOrganic ChemistryISBN: 9780135213728당신이 사용하는 게 아니라요?교과서 변경

Wade 9th Edition

Ch.11 - Reactions of Alcohols

문제 48d,e,f

11장, 문제 48d,e,f

Show how you would make each compound, beginning with an alcohol of your choice.
(d)
(e)
(f)

검증된 단계별 안내

Step 1: Analyze the target compounds provided in the images. The first compound is a cyclohexane derivative with a chlorine and methyl group in trans configuration. The second compound is an ester with a cyclohexane ring and a methyl ketone group. The third compound is a carboxylic acid attached to a cyclopentane ring.

Step 2: For compound (d), start with cyclohexanol as the alcohol. Perform a substitution reaction using SOCl₂ or PCl₅ to replace the hydroxyl group (-OH) with a chlorine atom (-Cl). Then, use a stereoselective reaction to introduce the methyl group in the trans configuration relative to the chlorine.

Step 3: For compound (e), begin with cyclohexanol as the alcohol. Oxidize the alcohol to a ketone using an oxidizing agent like PCC (Pyridinium Chlorochromate). Then, perform a reaction with methyl acetate in the presence of an acid catalyst to form the ester group.

Step 4: For compound (f), start with cyclopentanol as the alcohol. Oxidize the alcohol to a carboxylic acid using a strong oxidizing agent such as KMnO₄ or CrO₃ under acidic conditions.

Step 5: Verify the stereochemistry and functional groups of the synthesized compounds using spectroscopic techniques like NMR and IR to ensure the desired products are obtained.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Alcohols as Reactants

Alcohols are organic compounds containing one or more hydroxyl (-OH) groups. They serve as versatile starting materials in organic synthesis, allowing for various transformations such as oxidation, dehydration, and substitution reactions. Understanding the structure and reactivity of alcohols is crucial for designing synthetic pathways to target compounds.

Functional Group Transformations

Functional group transformations involve converting one functional group into another through chemical reactions. This concept is essential in organic synthesis, as it allows chemists to modify the properties of molecules. For example, alcohols can be converted into aldehydes, ketones, or alkyl halides, depending on the desired product and reaction conditions.

Reaction Mechanisms

Understanding reaction mechanisms is vital for predicting the outcomes of chemical reactions. A mechanism outlines the step-by-step process by which reactants are converted into products, including the formation and breaking of bonds. Familiarity with common mechanisms, such as nucleophilic substitution or elimination, helps in rationalizing how to synthesize the desired compounds from alcohols.

관련 실천

교과서 질문

Predict the esterification products of the following acid/alcohol pairs.

(d)

(e)

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교과서 질문

Show how you would convert (S)-hexan-2-ol to

(a) (S)-2-chlorohexane.

(b) (R)-2-bromohexane.

Both cis- and trans-2-methylcyclohexanol undergo dehydration in warm sulfuric acid to give 1-methylcyclohexene as the major alkene product. These alcohols can also be converted to alkenes by tosylation using TsCl and pyridine, followed by elimination using KOC(CH₃)₃ as a strong base. Under these basic conditions, the tosylate of cis-2-methylcyclohexanol eliminates to give mostly 1-methylcyclohexene, but the tosylate of trans-2-methylcyclohexanol eliminates to give only 3-methylcyclohexene. Explain how this stereochemical difference in reactants controls a regiochemical difference in the products of the basic elimination, but not in the acid-catalyzed elimination.

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교과서 질문

Predict the major products (including stereochemistry) when cis-3-methylcyclohexanol reacts with the following reagents.

(a) PBr₃

(b) SOCl₂

819

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교과서 질문

Predict the major products (including stereochemistry) when cis-3-methylcyclohexanol reacts with the following reagents.

(d) concentrated HBr

(e) TsCl/pyridine, then NaBr

1088

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교과서 질문

Show how you would make each compound, beginning with an alcohol of your choice.

(g)

(h)

1043

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Show how you would make each compound, beginning with an alcohol of your choice.(d) (e) (f)

비슷한 문제에 대한 검증된 영상 답변:

주요 개념

Alcohols as Reactants

Functional Group Transformations

Reaction Mechanisms

Show how you would make each compound, beginning with an alcohol of your choice.
(d)
(e)
(f)