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2005
Nucleic acids
U 0700
Synthesis of 9-Halogenated 9-Deazaguanine N7-(2'-Deoxyribonucleosides). —
The synthesis of nucleosides (V) is described. Since the yields obtained from haloge09- 204 nation of nucleoside (IIIa) are low, regioselective halogenation of nucleobase (Ia) prior
the glycosylation reaction is more suitable. By variation of the deprotection conditions,
either fully deprotected nucleosides (V), or sugar-deprotected derivatives (IV) and (VI)
are obtained. — (SEELA*, F.; SHAIKH, K. I.; WIGLENDA, T.; LEONARD, P.;
Helv. Chim. Acta 87 (2004) 10, 2507-2516; Lab. Org. Bioorg. Chem., Inst. Chem.,
Univ. Osnabrueck, D-49069 Osnabrueck, Germany; Eng.) — Klein
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