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  • Title: Palhicerines A-F, Lycopodium alkaloids from the club moss Palhinhaea cernua.
    Author: Tang Y, Xiong J, Zou Y, Zhang HY, Hu JF.
    Journal: Phytochemistry; 2016 Nov; 131():130-139. PubMed ID: 27576047.
    Abstract:
    Four fawcettimine-type (palhicerines A-D, resp.) and two lycopodine-type (palhicerines E and F) Lycopodium alkaloids together with twenty known ones were isolated from the whole plant of Palhinhaea cernua. The structures and absolute configurations of the palhicerines A-F were determined by extensive spectroscopic methods, single-crystal X-ray diffraction analyses, chemical transformation, and electronic circular dichroism (ECD) calculations or induced electronic circular dichroism (IECD) spectra. Among the isolates, the new C/D-ring of the palhicerines A-C (trans-fused fawcettimine-type alkaloids) are rare, and each possesses a β-oriented C-16 methyl group and a distinctive tertiary methoxy group at C-13. Chemotaxonomy for differentiating species in the genus Palhinhaea is briefly discussed.
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