The crystal structures of methyl 4,6-O-(R)-benzylidenen-2,3-di-O-methyl-α-d-gluco- and β-d-galacto-pyranoside
✍ Scribed by John C. Barnes; John S. Brimacombe; Brian H. Nichols; Timothy J.R. Weakly
- Book ID
- 108308808
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 660 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0008-6215
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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
Condensation of 2,4-di-O-acetyl-3,6-di-O-methyl-a-~glucopyranosyl bromide with either ally1 or benxyl2,4-di-0-methyl-cu+rhamnopyranoside in the presence of mercuric cyanide, followed by 0-deacetylation, gave the title oligosaccharides in excellent yields.