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13C NMR and 2D (H,H and H,C COSY) Spectra of Triazolo-triazino-indole Derivatives and the Conformational Analysis of the Respective C-Nucleoside Analogues
Authors:N. Rashed  A. El Nemr  E. S. H. El Ashry
Affiliation:Chemistry Department, Faculty of Science , Alexandria University , Alexandria, Egypt
Abstract:13C NMR and 2D (H,H and H,C COSY) spectra of selected examples of sugar (5H-1,2,4-triazino[5,6-b]-indol-3-yl) hydrazones, peracetylated sugar-1-acetyl -1- (5-acetyl-1,2,4-triazino[5,6-b]indol-3-yl)hydrazones, and 10-acetyl-3-(per-0-acetylalditol-1-yl)-1,2,4-triazolo[4′, 3′:2,3][1,2,4]triazino[5,6-b]indole have been reported. The conformation of the latter C-nucleoside analogues have been determined by analysis of their 1H NMR spectra. The D-galacto, D-manno and L-arabino isomers are preponderantly existing in the planar zigzag arrangement of carbon atoms.
Keywords:3-(alditol-l-yl) triazolo[4′,3′: 2,3]-1,2,4-triazino[5,6-b]indoles  13C NMR spectra  H,H and H,C COSY spectra  conformational analysis
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