Carbohydrate Research p. 153 - 176 (1985)
Update date:2022-08-03
Topics:
Paulsen, Hans
Lorentzen, Jens Peter
Kutschker, Wolfram
The azidonitration of 3,4,6-tri-O-acetyl-1,5-anhydro-2-deoxy-D-arabino-hex-1-enitol at low temperature afforded preponderantly the azidonitrate having the D-manno configuration.After reaction with sodium acetate, 1,3,4,6-tetra-O-acetyl-2-azido-2-deoxy-α-D-mannopyranose was directly isolated and deblocking gave 2-azido-2-deoxy-D-mannopyranose. 3,4,6-Tri-O-acetyl-2-azido-2-deoxy-α-D-mannopyranosyl bromide and 2-azido-3,4,6-tri-O-benzyl-α-D-mannopyranosyl bromide were prepared and are suitable for selective α- and β-glycoside synthesis.In the presence of platinum-oxygen, the catalytic oxidation of benzyl 2-azido-2-deoxy-α-D-mannopyranoside gave in high yields (benzyl 2-azido-2-deoxy-α-D-mannopyranosid)uronic acid from which 2-amino-2-deoxy-D-mannopyranuronic acid was obtained.By catalytic oxidation, selectively blocked derivatives of 2-amino-2-deoxy-D-mannopyranose were converted into the correspondind uronic acid derivatives.
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