Question
Question: The following reaction is performed:...
The following reaction is performed:
A
A bicyclic hemiacetal
B
A bicyclic acetal
C
A bicyclic enol ether
D
A bicyclic ether
Answer
A bicyclic acetal
Explanation
Solution
The starting material is a bicyclic acetal. The reaction shown is the acid-catalyzed hydrolysis of an acetal, which yields a carbonyl compound and two molecules of alcohol (or one molecule of diol in this case, forming a cyclic hemiacetal intermediate which then opens to a keto-alcohol). The question asks for the nature of the starting material, not the product. The structure depicted is a cyclic acetal formed from a ketone and a diol.