How is 2,3,4,6-Tetra-O-acetyl-1-S-acetyl-1-thio-alpha-D-glucopyranose (CAS: 62860-10-0) typically synthesized?

2,3,4,6-Tetra-O-acetyl-1-S-acetyl-1-thio-alpha-D-glucopyranose (CAS: 62860-10-0) is typically synthesized through a series of acetylation and thioetherification steps. The acetylation is usually catalyzed by acetic anhydride and a Lewis acid such as aluminum trichloride. The thioetherification involves the reaction of the acetylated glucopyranose with a thiol compound, often catalyzed by a base like sodium hydride. The synthetic route is known for its high selectivity and yield, making it a valuable intermediate in carbohydrate chemistry.