Show how to make these deuterium-labeled compounds, using CD3MgBr and D2O as your sources of deuterium, and any non-deuterated starting materials you wish.d. Ph(CD3)2COD

Ch.10 - Structure and Synthesis of Alcohols

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Wade 9th Edition

Ch.10 - Structure and Synthesis of Alcohols

문제 55d

10장, 문제 55d

Show how to make these deuterium-labeled compounds, using CD₃MgBr and D₂O as your sources of deuterium, and any non-deuterated starting materials you wish.
d. Ph(CD₃)₂COD

검증된 단계별 안내

Start with a non-deuterated benzaldehyde (PhCHO) as your starting material. This compound contains a benzene ring attached to a carbonyl group, which will serve as the electrophilic site for the Grignard reaction.

Prepare the Grignard reagent CD3MgBr. This reagent is a source of the deuterium-labeled methyl group (CD3) and will act as the nucleophile in the reaction.

React PhCHO with two equivalents of CD3MgBr. The first equivalent will add a CD3 group to the carbonyl carbon, forming an intermediate alkoxide. The second equivalent will add another CD3 group, resulting in the formation of Ph(CD3)2C−OMgBr.

Perform an acidic workup using D2O. The D2O will protonate the alkoxide group, replacing the oxygen-bound hydrogen with deuterium, yielding the final product Ph(CD3)2COD.

Isolate and purify the product Ph(CD3)2COD using standard organic chemistry techniques such as extraction, drying, and distillation or recrystallization.

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주요 개념

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Deuterium Labeling

Deuterium labeling involves substituting hydrogen atoms in organic compounds with deuterium, a stable isotope of hydrogen. This process is crucial in tracing reaction pathways and studying mechanisms in organic chemistry. In this question, CD3MgBr serves as a source of deuterium, allowing for the incorporation of deuterium into the final product.

Grignard Reagents

Grignard reagents, such as CD3MgBr, are organomagnesium compounds that react with various electrophiles to form carbon-carbon bonds. They are highly reactive and can be used to introduce deuterium into organic molecules. Understanding their reactivity and how they interact with other functional groups is essential for synthesizing the desired deuterium-labeled compound.

Deuterated Alcohols

Deuterated alcohols, like Ph(CD3)2COD, are compounds where deuterium replaces hydrogen in the hydroxyl group or alkyl chains. The synthesis of such compounds often involves reactions with deuterated reagents and can be used in various applications, including NMR spectroscopy. Recognizing how to form these compounds through specific reactions is key to solving the question.