Novel Syntheses of Diphenyl and/or Trimethylene Dithioacetals of Mono- and Oligosaccharides in 90% Trifluoroacetic Acid
作者:Masuo Funabashi、Sachiko Arai、Masashi Shinohara
DOI:10.1080/07328309908543999
日期:1999.1.1
Dithioacetals of aldopentoses (D-arabinose, D-ribose, D-xylose, and D-lyxose), aldohexoses (D-glucose, D-mannose, D-galactose), and common oligosaccharides (cellobiose, lactose, gentibiose, melibiose, maltose, and maltotriose) were conveniently prepared by reacting the corresponding free sugars respectively with benzenethiol and/or 1,3-propanedithiol at room temperature in 90% trifluoroacetic acid in much better yields than by the conventional methods.
Regioselective Dehydration of Sugar Thioacetals under Mild Conditions
作者:Rachel Szpara、Alexander Goyder、Michael J. Porter、Helen C. Hailes、Tom D. Sheppard
DOI:10.1021/acs.orglett.1c00424
日期:2021.4.2
are abundant in waste biomass, making them sustainablechiral building blocks for organic synthesis. The demand for chiral saturated heterocyclic rings for pharmaceutical applications is increasing as they provide well-defined three-dimensional frameworks that show increased metabolic resistance. A range of sugar thioacetals can be dehydratedselectively at C-2 under mild basic conditions, and the