Show how you would accomplish the following multistep syntheses, using the indicated starting material and any necessary reagents.
(d)

검증된 단계별 안내

Step 1: Protect the phenolic hydroxyl groups of gallic acid by methylation. Use a methylating agent such as dimethyl sulfate or methyl iodide in the presence of a base like potassium carbonate to convert the hydroxyl groups into methoxy groups. This will yield trimethoxybenzoic acid.

Step 2: Reduce the carboxylic acid group of trimethoxybenzoic acid to an aldehyde. This can be accomplished using a reagent like diisobutylaluminum hydride (DIBAL-H) under controlled conditions to selectively reduce the carboxylic acid to an aldehyde, forming trimethoxybenzaldehyde.

Step 3: Perform a reductive amination reaction to introduce the ethylamine group. React trimethoxybenzaldehyde with ethylamine in the presence of a reducing agent such as sodium cyanoborohydride (NaBH3CN) or hydrogen gas with a catalyst like palladium on carbon (Pd/C). This will yield mescaline.

Step 4: Purify the product using techniques such as recrystallization or chromatography to isolate mescaline from any side products or unreacted starting materials.

Step 5: Confirm the structure of mescaline using spectroscopic methods such as NMR (nuclear magnetic resonance) and IR (infrared spectroscopy) to ensure the synthesis was successful.

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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.

Multistep Synthesis

Multistep synthesis involves a series of chemical reactions that transform a starting material into a desired product through intermediate compounds. Each step typically requires specific reagents and conditions, and understanding the reactivity of functional groups is crucial for planning the sequence of reactions effectively.

Reagents and Reaction Conditions

Reagents are substances used to bring about a chemical reaction, while reaction conditions include temperature, pressure, and solvent choice. Selecting the appropriate reagents and optimizing conditions are essential for achieving high yields and desired selectivity in each step of the synthesis.

Functional Group Transformation

Functional group transformation refers to the process of converting one functional group into another during a chemical reaction. This concept is vital in organic synthesis, as it allows chemists to modify the structure and properties of molecules, facilitating the construction of complex organic compounds from simpler precursors.

Show how you would accomplish the following multistep syntheses, using the indicated starting material and any necessary reagents.(d)