How is 2-Hydroxy-N,N,N-trimethylethanaminium 2-[4-(4-chlorobenzoyl)phenoxy]-2-methylpropanoate (CAS: 856676-23-8) typically synthesized?

2-Hydroxy-N,N,N-trimethylethanaminium 2-[4-(4-chlorobenzoyl)phenoxy]-2-methylpropanoate is typically synthesized via a multistep process involving the reaction of 4-chlorobenzoyl chloride with 2-hydroxy-N,N,N-trimethylaminium 2-methylpropanoate. The synthesis involves the use of anhydrous organic solvents and may require the presence of a suitable catalyst to enhance the reaction rate and yield. The product is obtained with moderate to high yield depending on the reaction conditions and purification methods.