How is 3-Chloro-2,2-bis(chloromethyl)-1-propanol (CAS: 813-99-0) typically synthesized?

3-Chloro-2,2-bis(chloromethyl)-1-propanol (CAS: 813-99-0) is typically synthesized through the reaction of polyvinyl chloride with hydrochloric acid in the presence of a suitable catalyst, such as aluminum chloride. The process involves the chloromethylation of vinyl chloride monomers followed by ring closure to form the desired 3-chloro-2,2-bis(chloromethyl)-1-propanol. The yield can be up to 90%, depending on the reaction conditions and catalyst selection.