Abstract
Methyl 6-(N-benzenesulfonylamino)-N,O-isopropylidene-2,3,6,8-tetradeoxy-α-d-erythrooct-2-enopyranos-4-uloside, C18H23N1O6S1, (3) crystallizes in the orthorhombic space groupP212121. The unit cell parameters are:a=7.839(2),b=10.111(2),c=24.217(5) A. The dihydropyranone ring adopts a deformed sofa conformation with the O5 atom deviating 0.586(2) A from the least-squares plane and the β-face of the carbonyl group shielded by the terminal (C8) methyl group. 1,1-O,O-Ethylidene-3,4-dideoxy-d,l-hex-3-enoz-2-ulopyranos-5-ulose, C8H10O5, (6) crystallizes in the monoclinic space groupP21/n. The unit cell parameters are:a=6.310(1),b=18.656(3),c=7.604(1) A, β=106.01(1)°. The dihydropyranone ring adopts a deformed sofa conformation with O6 atom deviating 0.482(1) A from the leastsquares plane and the hydroxy and dioxolanyl substituents are in pseudoaxial and pseudoequatorial positions, respectively. The average planes of six-membered and five-membered rings are approximately coplanar.
Published Version
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