Show how you would accomplish the following syntheses. Some of these conversions may require more than one step.
(e) cyclohexylamine → N-cyclohexylacetamide
(f) bromocyclohexane → dicyclohexylmethanol

검증된 단계별 안내

Step 1: For the conversion of cyclohexylamine to N-cyclohexylacetamide, start by recognizing that this is an acylation reaction. Cyclohexylamine (R-NH2) reacts with an acyl chloride (R'-COCl) to form an amide. Choose acetyl chloride (CH3COCl) as the acylating agent.

Step 2: Mix cyclohexylamine with acetyl chloride in the presence of a base like pyridine or triethylamine. The base neutralizes the HCl byproduct formed during the reaction, ensuring smooth conversion to N-cyclohexylacetamide.

Step 3: For the conversion of bromocyclohexane to dicyclohexylmethanol, recognize that this involves a Grignard reaction. First, convert bromocyclohexane to cyclohexylmagnesium bromide by reacting it with magnesium metal in dry ether.

Step 4: React cyclohexylmagnesium bromide with cyclohexanone (C6H10O). The Grignard reagent adds to the carbonyl group of cyclohexanone, forming an intermediate alkoxide.

Step 5: Perform an acidic workup (e.g., using dilute HCl or water) to protonate the alkoxide intermediate, yielding dicyclohexylmethanol as the final product.

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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.

Amine Reactivity

Cyclohexylamine is a primary amine that can undergo acylation to form N-cyclohexylacetamide. This reaction involves the nucleophilic attack of the amine on an acyl chloride or anhydride, leading to the formation of an amide bond. Understanding the reactivity of amines is crucial for predicting the products of such transformations.

Bromination and Nucleophilic Substitution

Bromocyclohexane contains a bromine atom that can be replaced through nucleophilic substitution reactions. In the synthesis of dicyclohexylmethanol, the bromine can be displaced by a nucleophile, such as a cyclohexyl anion, followed by reduction to form the alcohol. Familiarity with substitution mechanisms is essential for planning multi-step syntheses.

Reduction Reactions

Reduction reactions are key in organic synthesis, particularly when converting carbonyl compounds to alcohols. In the case of dicyclohexylmethanol, a carbonyl intermediate formed from the nucleophilic substitution can be reduced using reagents like lithium aluminum hydride or sodium borohydride. Understanding reduction mechanisms is vital for completing the synthesis effectively.

Show how you would accomplish the following syntheses. Some of these conversions may require more than one step.(e) cyclohexylamine → N-cyclohexylacetamide(f) bromocyclohexane → dicyclohexylmethanol