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.
A synthesis of 1,2-trans-related glycofuranosyl acetates
作者:Robert J. Ferrier、Stephen R. Haines
DOI:10.1016/0008-6215(84)85117-4
日期:1984.4
Facile exchange of glycosyl S,S-acetals to their O,O-acetals and preparation of glycofuranosides from acyclic glycosyl S,S-acetals under metal-free reaction conditions in the presence of 1,3-dibromo-5,5-dimethylhydantoin
作者:Soni Kamlesh Madhusudan、Anup Kumar Misra
DOI:10.1016/j.carres.2004.12.002
日期:2005.2
Exchange of acyclic glycosyl dithioacetals to their O,O-acetals has been achieved by a generalized reaction protocol mediated by 1,3-dibromo-5,5-dimethylhydantoin under mild, metal-free and neutral conditions. This methodology has been extended to the synthesis of alkyl glycofuranosides. (C) 2004 Published by Elsevier Ltd.