13C-n.m.r. analysis of the effects of dissociation of the hydroxyl groups of 1-β-d-arabinofuranosylcytosine and its O’-methyl derivatives on conformation
✍ Scribed by Stanislaw J. Komorowski; Irena Ekiel; Edward Darzynkiewicz; David Shugar
- Book ID
- 108308701
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 719 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0008-6215
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The 'H-and "C-n.m.r. spectra of seven in&lo1 methyl ethers were recorded and assigned. They were classified into five types, and the effect of 0methyl&ion on the chemical shifts of each type is discussed. NOTE ADDED IN PROOF Type F, not encountered in our work, occurs in 1,6-anhydro-3-O-methyl-& D
X-ray crystallographic analyses are reported for the two title compounds (8 and 9), of which the former crystallized in two modifications (8n and 8b). In all three structures, the pyranose rings have the %, (D) conformation and the substituents at C-l are axial and those at C-24-4 are equatorial. Th