How is L-Homopropargylglycine hydrochloride (CAS: 942518-19-6) typically synthesized?

L-Homopropargylglycine hydrochloride is typically synthesized by the reaction of L-homopropargylglycine with hydrochloric acid. The key steps include the protection of the amino group, followed by the addition of the propargyl group, and finally, the formation of the hydrochloride salt. The process can be optimized using different solvents and temperature conditions to achieve high yield and selectivity.