D.J. Slatkin

Quaternary alkaloids of Thalictrum foliolosum

Abstract The isolation and identification of eleven alkaloids from the quaternary alkaloid fraction of a root extract of Thalictrum foliolosum are described

Trigilletine and tricordatine: Two new bisbenzylisoquinoline alkaloids from Triclisia species

Abstract Trigilletine and tricordatine, two new alkaloids from Ghanian menispermaceous species, have structures Ib and Ic, respectively and are examples of phenolic isotrilobine-type (Ia) alkaloids from higher plants.

RUSCODIBENZORURAN, A NEW DIBENZOFURAN FROM RUSCUS ACULEATUS L. (LILIACEAE)

The structure of ruscodibenzofuran, a new naturally occurring dibenzofuran from the roots of Ruscus aculeatus L. (Farn. Liliaceae), was determined by spectral means, the synthesis of model compounds and was confirmed by X-ray diffraction analysis.

Pachyovatamine, a bisbenzylisoquinoline alkaloid, and other alkaloids from Pachygone ovata

Abstract A new dibenzo- p -dioxin biphenyl bisbenzylisoquinoline alkaloid, pachyovatamine, has been isolated from an extract of the leaves and stems of Pachygone ovata from Sri Lanka. The alkaloid was characterized by a consideration of its physicochemical data and conversion to O -acetyltiliacorinine. Pachygonamine, N -methylpachygonamine and tiliamosine were also isolated from the same extract.

Dehydrodiscretine, an infrequently occurring quaternary protoberberine alkaloid from heptacyclum zenkeri

Abstract Dehydrodiscretine, a quaternary protoberberine alkaloid, has been isolated from Heptacyclum zenkeri Engl. (syn. Penianthus zenkeri Diels). This is the first reported isolation of this alkaloid from a member of the Menispermaceae and only the second reported isolation from nature.