Before you begin, you'd probably cover the glass with masking tape.
Organic chemists do something remarkably similar.
Many molecules contain several reactive groups that would all try to react at once. If a chemist wants to change only one specific part of the molecule, the others often need to be temporarily ""covered"" first.
These temporary masks are called protecting groups, and they are among the most elegant ideas in modern synthetic chemistry.
(S)-(+)-2,2-Dimethyl-1,3-dioxolane-4-methanol belongs to a family of molecules widely used for this purpose. Its cyclic acetal structure can help protect sensitive alcohol functions during multi-step syntheses, allowing chemists to perform reactions that would otherwise be impossible.
Global Chemical Database