Beginning with the molecules on the left of each chemical equation, synthesize the molecules shown. While there can be multiple ways of doing each synthesis, the minimum number of steps necessary is indicated over each reaction arrow.
(c)

검증된 단계별 안내

Step 1: Perform an elimination reaction on the starting molecule (cyclopentylmethyl bromide) to form an alkene. Use a strong base, such as potassium tert-butoxide, to remove the bromine atom and generate cyclopentylmethyl alkene (CH2=CH-cyclopentane).

Step 2: Carry out an ozonolysis reaction on the alkene formed in Step 1. Use ozone (O3) followed by a reducing agent like dimethyl sulfide (DMS) or zinc in acetic acid to cleave the double bond and form two products: formaldehyde (H2C=O) and cyclopentylacetaldehyde.

Step 3: Oxidize the aldehyde group in cyclopentylacetaldehyde to a ketone. Use a mild oxidizing agent such as PCC (pyridinium chlorochromate) or a stronger oxidizing agent like Jones reagent (CrO3/H2SO4) to convert the aldehyde to cyclopentylacetone.

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영상 길이:

주요 개념

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

Synthesis in Organic Chemistry

Synthesis in organic chemistry refers to the process of constructing complex organic molecules from simpler ones through a series of chemical reactions. Understanding the synthesis pathway is crucial, as it involves selecting appropriate reagents and conditions to achieve the desired product efficiently. Each step in the synthesis must be carefully planned to minimize the number of reactions while maximizing yield.

Reaction Mechanisms

A reaction mechanism describes the step-by-step sequence of elementary reactions by which overall chemical change occurs. It provides insight into how reactants transform into products, including the formation and breaking of bonds. Familiarity with common mechanisms, such as nucleophilic substitution or elimination, is essential for predicting the outcomes of synthetic routes.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups is vital for understanding reactivity and guiding synthesis, as different groups can dictate the types of reactions that can occur. For example, carbonyl groups (C=O) are key in many synthesis pathways, including the formation of aldehydes and ketones.

Beginning with the molecules on the left of each chemical equation, synthesize the molecules shown. While there can be multiple ways of doing each synthesis, the minimum number of steps necessary is indicated over each reaction arrow.(c)