As part of a programme involving X-ray crystallographic studies" of cis-and tpuns-fused hexopyranosides, we now report on the crystal structures of methyl 2-~-methyl-~-D-glucop~anoside\* (11, which was obtained by debe~lidenation of methyl 4,~-O-benzyIidene-2-O-methyI-3-O-~-tolylsulfonyl-~-~-glucopy
X-Ray crystallographic and n.m.r. (1H and 13C) studies of methyl 4,6-O-(R)-benzylidene-3-O-methyl-2-O-p-tolylsulfonyl-α-d-glucopyranoside and methyl 4,6-O-(R)-benzylidene-2-O-methyl-3-O-p-tolylsulfonyl-β-d-glucopyranoside
✍ Scribed by Elizabeth Lee; Patrick McArdle; Noeleen Melody; Desmond Cunningham; John Gallagher
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 457 KB
- Volume
- 208
- Category
- Article
- ISSN
- 0008-6215
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📜 SIMILAR VOLUMES
The secondary hydroxyl groups in methyl 4,6-0-benzylidene-/3-Dglucopyranoside (1) show i, towards various reagents, little selectivity in partial etherification and esterification reactions, compared to those in the corresponding cr-D-glucopyranoside derivative. Most of the selective benzylatiorG,
Both 'H-and 13C-n.m.r. spectroscopy have been employed in structural studies of the 4,6-O-benzylidene-D-aldohexopyranosides and derivatives, including some deoxy sugars . I4 We now report i3C-n.m.r. data (Table I) for the 4,6-O-benzylidene derivatives of methyl 2-deoxy-( 2) 2-deoxy-3-O-methyl-(3),
Acylated ]3-o-xylopyranose derivatives are known to exist as a mixture of the 1C 4 and 4C I conformers in rapid equilibrium in solution [3]. Several conformations have also been reported for/3-D-xylopyranose derivatives in the solid state [4]. In the course of our study to investigate the functions
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