Preparation and some reactions ofD-glucosyl derivatives of 2-thioxo-1,3,4-oxadiazoles and 2-thioxo-1,3,4-thiadiazoles and their 2-oxo analogues
作者:Farouk M.E. Abdel-Megeid、Mohamed A.-F. Elkaschef、Hamed M.A. Abdel-Bary
DOI:10.1016/s0008-6215(00)83296-6
日期:1977.11
-glucopyranosyl bromide in the presence of potassium hydroxide to yield thioglucosides (2a–d , respectively, in good yield) and N -glucosyl derivatives (3a–d , respectively, in poor yield). Oxidation of 2a–d with potassiumpermanganate yielded the corresponding sulphones (4a–d) , whereas 3a–d yielded the corresponding 2-oxo derivatives (5a–d) . The acetates 2a–d , 3a–d , and 5a–d were deacetylated with
The structure of the title compound, C22H24N2O9S2, is described. This compound consists of a sugar ring and a heterocyclic base linked unusually by an S atom. The sugar is in a C-4(1) chair conformation and forms dihedral angles of 49.54 (4) and 33.42 (5)degrees with the thiadiazole and phenyl rings, respectively. The S atom occupies an equatorial position of the sugar ring and lies 1.807 (2) angstrom out of the corresponding mean plane.