10.1016/0008-6215(91)80095-5
The research focuses on the synthesis and acetolytic deacetalation of branched-chain thiosugar derivatives, specifically 8 and 13, derived from 1,2-O-isopropylidene-D-xylofuranose. The study investigates the effects of temperature on the reaction outcomes, revealing that lower temperatures lead to the formation of novel thiolanes (9 and 17) due to furanose ring opening, while higher temperatures yield the desired 1,2-di-O-acetyl furanoses (6 and 14). Key chemicals involved in the synthesis include p-toluenesulfonic acid (TsOH), acetic anhydride, lithium aluminium hydride, trichloroacetic acid, and tert-butyldiphenylsilyl chloride. The research also explores the use of boron trifluoride etherate and camphorsulfonic acid (CSA) as alternative catalysts, highlighting the significant role of reaction temperature in determining product distribution and the potential for ring-opening and ring-expansion pathways in the acetolysis of these thiosugars.