How is N,N,N-Trimethyl-2-propen-1-aminium chloride (CAS: 1516-27-4) typically synthesized?

N,N,N-Trimethyl-2-propen-1-aminium chloride is typically synthesized through the reaction of 2-propen-1-amine with methyl iodide in the presence of a base like sodium hydroxide. The process involves the formation of the corresponding trimethylammonium ion followed by the chloride substitution to yield the final product. The reaction is carried out under mild conditions to ensure high yield and selectivity.