13035-12-6Relevant articles and documents
Synthesis and reactivity of halogenated 1,2,4-triazole nucleoside analogues with high potential for chemical modifications
Libnow, Stefanie,Wille, Susanne,Christiansen, Andrea,Hein, Martin,Reinke, Helmut,Koeckerling, Martin,Miethchen, Ralf
, p. 496 - 508 (2007/10/03)
1,2,4-Triazole nucleoside analogues bonded at N-1 of the base were synthesized by addition of N-halo-3,5-dibromo-1,2,4-triazoles to 1,2-unsaturated carbohydrate derivatives (glycals). Examples are given for 1,5-anhydro-3,4,6- tri-O-acetyl-2-deoxy-D-arabino-hex-1-enitol (tri-O-acetyl-D-glucal), and 1,5-anhydro-3,4,6-tri-O-benzyl-2-deoxy-D-arabino-hex-1-enitol (tri-O-benzyl-D-glucal), respectively. The graduated reactivity of the three halogens [C-5 (triazole) > C-2 (sugar) > C-3 (triazole)] in the addition products allows subsequent regioselective replacement and deprotection reactions like hydrodehalogenations, nucleophilic substitutions (by methoxide, hydrazine, benzylamine, thiophenolate), deacetylations, and debenzylations, respectively. Thus, the paper opens a new synthetic approach to triazole nucleoside analogues of 2-deoxy-sugars. X-ray analyses support the structures of nine products. Georg Thieme Verlag Stuttgart.