Acetal
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An acetal is a functional group or molecule containing the functional group of a carbon bonded to two -OR groups. "Acetal" can also refer to polyoxymethylene, an engineering plastic containing acetal groups.
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Acetal.png
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where R, R¹ and R¹¹ are all carbon backbones.
Acetals can be used as carbonyl-protecting groups.
Reactions
Synthesis
- Nucleophilic addition of an alcohol to a resonance stabilized cation
- hemiacetal + alcohol + acid (catalyst) ↔ acetal + water
An acetal can, under certain conditions, be converted back into a hemiacetal and an alcohol.de:Acetale nl:Acetaal pl:Acetal