What is a cyclic acetal?
A cyclic acetal is an acetal in which the acetal carbon and one or both oxygen atoms are members of a ring.
An acetal is a compound that contains two ether groups on the same carbon atom.
If the two OH groups are part of a 1,2- or a 1,3-diol, the product is a cyclic acetal.
The video below describes how a cyclic acetal is formed from a diol.
Hence, cyclic acetals are more stable and easier to prepare than acyclic acetals.