Ch.6 - Alkyl Halides; Nucleophilic Substitution

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

Wade 9th Edition

Ch.6 - Alkyl Halides; Nucleophilic Substitution

문제 46e

6장, 문제 46e

Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.
(e)

검증된 단계별 안내

Step 1: Begin with cyclohexane as the starting material. Cyclohexane is a saturated hydrocarbon with the molecular formula C6H12. To introduce a functional group, you need to activate one of the hydrogens on the ring.

Step 2: Perform a free radical halogenation reaction using bromine (Br2) and light (hv) or heat. This will replace one hydrogen atom on the cyclohexane ring with a bromine atom, forming bromocyclohexane.

Step 3: Prepare a nucleophile for substitution. Use methoxide ion (CH3O⁻), which can be generated from sodium methoxide (NaOCH3) in methanol. Methoxide is a strong nucleophile and will readily participate in a substitution reaction.

Step 4: Perform an SN2 reaction between bromocyclohexane and methoxide ion. The bromine atom will be replaced by the methoxy group (-OCH3), resulting in the formation of methoxycyclohexane.

Step 5: Purify the product using standard organic chemistry techniques such as distillation or recrystallization to isolate methoxycyclohexane.

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주요 개념

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

Cyclohexane Structure and Reactivity

Cyclohexane is a six-membered carbon ring that is saturated, meaning it contains only single bonds. Its stable chair conformation minimizes steric strain, making it a common starting material in organic synthesis. Understanding its structure is crucial for predicting how it will react in various chemical transformations, including substitution and radical reactions.

Radical Reactions

Radical reactions involve species with unpaired electrons, known as radicals, which can initiate chain reactions. In the context of synthesizing compounds from cyclohexane, radical halogenation can introduce functional groups like methoxy (OCH3) through the abstraction of hydrogen atoms. Mastery of radical mechanisms is essential for designing effective synthetic pathways.

Functional Group Transformation

Functional group transformation refers to the process of converting one functional group into another, which is a key aspect of organic synthesis. In this case, converting cyclohexane into a methoxy-substituted cyclohexane involves introducing an ether group. Understanding the reactivity and compatibility of different functional groups is vital for successful synthesis.

관련 실천

교과서 질문

Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.

(c)

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교과서 질문

A solution of pure (S)-2-iodobutane ([α] = +15.90°) in acetone is allowed to react with radioactive iodide, ¹³¹I^–, until 1.0% of the iodobutane contains radioactive iodine. The specific rotation of this recovered iodobutane is found to be +15.58°.

b. What does this result suggest about the mechanism of the reaction of 2-iodobutane with iodide ion?

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교과서 질문

Predict the products of the following S_N2 reactions.

(e)

(f)

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교과서 질문

a. Determine the percentages of (R)- and (S)-2-iodobutane in the product mixture.

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교과서 질문

Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.

(a)

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교과서 질문

Strawberry growers have used large quantities of methyl bromide (b.p. 4 °C) to sterilize the soil before planting their crops. Like some of the freons, methyl bromide can diffuse up into the stratosphere, where it damages the protective ozone layer. Agricultural chemists have suggested using methyl iodide (b.p. 43 °C) as a replacement for methyl bromide. Why is methyl iodide likely to be more toxic to agricultural pests (and people) than methyl bromide? Why is methyl iodide less likely to reach the stratosphere than methyl bromide?

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Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.(e)

비슷한 문제에 대한 검증된 영상 답변:

주요 개념

Cyclohexane Structure and Reactivity

Radical Reactions

Functional Group Transformation

Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.
(e)