- D-arbinose-based synthesis of homo-C-d4T and homo-C-thymidine
-
2,3,5-Tri-O-benzyl-D-arabinofuranosyl halides (chloride, bromide) were reacted with AllMgBr, MeMgBr, and VinMgBr to furnish anomeric mixtures of the C-glycosyl products. The factors that influenced the β/α ratio are discussed. The α,β-C-vinyl derivative was transformed into 1-deoxy-1-C-hydroxymethyl-β and α-D-arabinofuranoses (2,5-anhydro-D-glucitol and -mannitol, respectively), separable after isopropylidenation step. 2,5-Anhydro-1,3-O-isopropylidene-D-glucitol was converted into 2,5-anhydro-6-O-triphenylmethyl-D-erythro-hex-3,4-enitol and 2,5-anhydro-4,6-di-O-benzoyl-3-deoxy-D-ribo-hexitol, which were coupled with N-3-benzoylthymine under the Mitsunobu conditions to furnish two analogs of nucleosides with a -CH2- insert between sugar moieties and thymine. (Chemical Equation Presented).
- Doboszewski, Bogdan
-
experimental part
p. 875 - 901
(2010/08/19)
-
