2-Ethoxyethyl 4-methylbenzene-1-sulfonate

This compound acts as a versatile building block, introducing the necessary ethoxyethyl group and serving as a protecting group for hydroxyls or as a good leaving group in nucleophilic substitutions during Bilastine’s complex multi-step manufacturing process, ensuring high yield and purity. 2-Ethoxyethyl 4-methylbenzene-1-sulfonate is a key intermediate, mainly employed to synthesize the second-generation antihistamine Bilastine, which treats allergies like hay fever (allergic rhinitis) and hives (urticaria).