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|Title:||Synthesis, reactions, and crystal structure of 5-azido-6-O-benzoyl-3,5-dideoxy-3-fluoro-1,2-O-isopropylidene-α-D-gluc ofuranose|
|Authors:||Lee, C.-K. |
|Citation:||Lee, C.-K., Jiang, H., Koh, L.L. (1992-01-01). Synthesis, reactions, and crystal structure of 5-azido-6-O-benzoyl-3,5-dideoxy-3-fluoro-1,2-O-isopropylidene-α-D-gluc ofuranose. Carbohydrate Research 225 (1) : 99-111. ScholarBank@NUS Repository.|
|Abstract:||5-Bromo-6-O-tert-butyldiphenylsilyl-5-deoxy-1,2-O-isopropylidene-β-L-t alofuranose (7) was obtained by treatment of 3,5-O-benzylidene-6-O-tert-butyldiphenylsilyl-1,2-O-isopropylidene-α-D -glucofuranose (3) with N-bromosuccinimide followed by Zemplen O-deacylation and an oxidation-reduction sequence. Nucleophilic displacement of the bromide in 7 with potassium azide readily gave the corresponding 5-azido-5-deoxy-allo derivative 8. Treatment of the 3-trifluoromethanesulphonate of 8 with tris(dimethylamino)sulphonium difluorotrimethylsilicate gave 5-azido-6-O-tert-butyldiphenylsilyl-3,5-dideoxy-3-fluoro-1,2-O-isopropy lidene-α-D-glucofuranose (17). The configuration at C-3 in 17 was confirmed by X-ray crystallography of the 6-benzoate 19.|
|Source Title:||Carbohydrate Research|
|Appears in Collections:||Staff Publications|
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