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The title compound, acetic acid-3,5-diacetoxy-2-acetoxymethyl-6-(4-quinoxalin- 2-yl-phenoxy)-tetrahydro-pyran-4-yl-ester 8 (C28H28N2O10, Mr = 552.54), has been synthesized and its crystal structure was determined by X-ray diffraction analysis. It crystallizes in monoclinic, space group P21, a = 10.060(8), b = 5.648(4), c = 24.11(2) ?, β = 91.078(10)o, Z = 2, V = 1369.9(19) ?3, Dc = 1.339 g/cm3, μ(MoKα) = 1.03 cm-1, F(000) = 580.00, T = 1?93.1 K, ?θmax = 25.03, (?/σ)max = 0.0000, Flack = –0.0(24), the final R = 0.0680 and wR = 0.140 (w = 1/[0.0016Fo2 + 1.0000σ(Fo2)]/(4Fo2)) for 3126 observed reflections (I > 2σ(I)). The pyranoid ring adopts chair conformation in the sugar moiety, and all of the acetyl groups are in the e bond of the pyranoid ring, so the sugar moiety is very stable.
The title compound, acetic acid-3,5-diacetoxy-2-acetoxymethyl-6- (4-quinoxalin- 2 -yl- phenoxy) -tetrahydro- pyran- 4-yl- ester 8 (C28H28N2O10, Mr = 552.54), has was synthesized and its crystal structure was determined by X-ray diffraction analysis. It crystallizes in monoclinic space group P21 with a = 10.060 (8), b = 5.648 (4), c = 24.11 10 = 0, Z = 2, V = 1369.9 (19)? 3, Dc = 1.339 g / cm3, μ (MoKα) = 1.03 cm-1, F = 25.03, (? /?) Max = 0.0000, Flack = -0.0 (24), the final R = 0.0680 and wR = 0.140 (w = 1 / [0.0016Fo2 + 1.0000σ (Fo2)] / (4Fo2)) for 3126 observed reflections (I> 2σ (I)). The pyranoid ring chair chair conformation in the sugar moiety, and all of the acetyl groups are in the e bond of the pyranoid ring, so the sugar moiety is very stable.