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Communication | Regular issue | Vol 24, No. 6, 1986, pp.1513-1516
Published online, 1st January, 1970
DOI: 10.3987/R-1986-06-1513
The Structures of Four New Diterpenoid Alkaloids

Antonio G. González, Gabriel de la Fuente,* Matías Reina, and Rafael Díaz Acosta

*Instituto de QUímica Orgánica, Instituto de Productos Naturales Orgánicos, C. S. I. C./ Unversidad de La Laguna, La Laguna, Tenerife, Canary Islands, Spain

Abstract

Together with karakoline, dihydrogadesine and 14-acetyldihydrogadesine, the new alkaloids 14-benzoylgadesine and 14-benzoyldihydrogadesine were isolated from Delphinium cardiopetalum. The new bases gadeline and 14-acetylgadesine were also isolated from Delphinium pentagynum. The structures of the new compounds were determined with the aid of 1H and 13C-nmr spectroscopy and chemical correlation to known alkaloids. The 13C-nmr chemical shifts for gadesine, dihydrogadesine and 14-acetyldihydrogadesine are also presented.