MCAT Organic Chemistry Question 75: Answer and Explanation

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Question: 75

15. Which of the following will convert a cyclic acetal to a carbonyl and a dialcohol?

A. Aqueous acid
B. LiAlH₄
C. CrO₃
D. Acetone

Correct Answer: A

Explanation:

An acetal can be converted to a carbonyl and a dialcohol by treatment with aqueous acid. This is the final step when using alcohols as protecting groups, called deprotection.

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