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Details van artikel 106 van 178 gevonden artikelen
| Titel: |
Reacttvite Comparee de Divers Accepteurs de la d-Glucosamine lors de la Synthese de Precurseurs du Chitobiose |
| Auteur: |
Lafont, Dominique Boullanger, Paul Fenet, Bernard |
| Verschenen in: |
Journal of carbohydrate chemistry |
| Paginering: | Jaargang 13 (1994) nr. 4 pagina's 565-583 |
| Jaar: |
1994-06-01 |
| Inhoud: |
Six d-glucosamine derivatives, diversely substituted at the nitrogen atom, were tested as acceptors in glycosylation reactions with 1,3,4,6-tetra-O-acetyl-2-allyloxycarbon-ylamino-2-deoxy-β-d-glucopyranose (1) as the donor and trimethylsilyl trifluoromethane-sulfonate as the promoter. The observed yields were high with 2-phthalimido- and 2-azido d-glucosamine acceptors and more generally good with acceptors of the 1,6-anhydro-d-glucosamine series. The disaccharides benzyl 4-O-(3,4,6-tri-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-d-glucopyranosyl)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-dgluco-pyranoside (20), benzyl 4-O-(3,4,6-tri-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-d-glucopyranosyl)-2-allyloxycarbonylamino-3,6-die-O-benzyl-2-deoxy-β-d-glucopyranoside (21), 4-O-(3,4,6-tri-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-d-glucopyranosidel)-1,6-anhydro-2-azido-3-O-benzyl-2-deoxy-β-d-glucopyranose (22), 4-O-(3,4,6-tri-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-d-glucopyranosyl)-2-allkyloxycarbonylamino-1,6-an-hydro-3-O-benzyl-2-doxy-β-d-glucopyranose (23), 2-acetamido-4-O-(3,4,6-tri-O-acetyl-2-allyloxycarbonylamino-2-deoxy-β-d-glucopyranosyl)-1,6-anhydro-3-O-benzyl-2-deoxy-β-d-glucopyranose (24) and 2-acetamido-4-O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-d-glucopyranosyl)-1,6-anhydro-3-O-benzyl-2-deoxy-β-d-glucopyranose (25) have thus been synthesized. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 106 van 178 gevonden artikelen
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