Structure of 5-acetyl-1-(3,5-O-isopropylidene-β-D-xylofuranosyl)uracil
✍ Scribed by Jones, D. W. ;Sowden, J. M.
- Book ID
- 114528632
- Publisher
- International Union of Crystallography
- Year
- 1982
- Weight
- 407 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0567-7408
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The structures of the title compounds (2b and 3) have been investigated in the solid state by X-ray methods. The crystals of 2b are monoclinic, space group P2,, and of 3 orthorhombit, space grtup P2,2,2,. The cell dimensions are: for 2b, a = 9.910(2), b = 11;745W, c = 11.810(3) A, /3 = 97.32(l)"; a
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
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