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X-ray crystallographic investigation of 4-O-acetyl-3-O-trityl-1,2-0-[1-cexo-cyano)ethylidene]-β-L-arabinopyranose and 3-O-Acetyl-4-O-Trityl-1,2-O-[1-(Exo-cyano)ethylidene]-β-L-Arabinopyranose

✍ Scribed by M. O. Dekaprilevich; L. G. Vorontsova; O. S. Chizhov


Book ID
112444196
Publisher
Springer
Year
1986
Tongue
English
Weight
315 KB
Volume
35
Category
Article
ISSN
1573-9171

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Vicinal proton-proton spin-coupling constants for methyl 5-O-acetyl-2-O-benzoyl-3,4-O-isopropylidene-fl-L-idoseptanoside (1) have led to the assignment [1] of the twist-chair conformation, °'ITC2, 3 [2], for the seven-membered ring in 1 in which the pseudo-axis of symmetry passes through C-5. Since