Publications [#233579] of Andrew T. McPhail

Journal Articles

  1. Luhan, PA; McPhail, AT, "Crystal and Molecular Structure of Sceletium Alkaloid A4 by X-Ray Analysis", J. Chem. Soc. Perkin II, 1972(13), 2006-2010 [doi].
    (last updated on 2026/01/21)

    Abstract:
    Sceletium Alkaloid A4, (1). C20H24N 2O2, isolated from Sceletium namaquense L. Bolus crystallizes in the monoclinic system, space group P21, with a=8.33(2), b=14.74(3), c=7.18(2) Å, β=95.04(20)°, and Z=2. The structure was solved from photographic X-ray data by direct phase-determining methods and refined by full-matrix least-squares calculations to R 0.100 over 1523 observed reflexions. The alkaloid which contains a 2,3-disubstituted pyridine moiety is representative of a third structure variant in Sceletium species.