Crystal and molecular structure of sceletium alkaloid A4 by X-ray analysis
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 13,p. 2006-2010
- https://doi.org/10.1039/p29720002006
Abstract
Sceletium Alkaloid A4, (1), C20H24N2O2, 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.Keywords
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