Etudees en série indolique—VI : Transformation des alcaloïdes du type vobasine en alcaloïdes du type dehydroervatamine Analyse aux rayons X de l'ervatamine |
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| Authors: | A Husson Y Langlois C Riche H-P Husson P Potier |
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| Institution: | Institut de Chimie des Substances Naturelles, C.N.R.S., 91190, Gif s/Yvette, France |
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| Abstract: | N-oxides of vobasine alkaloids lead to dehydroervatamine alkaloids on treatment with trifluoroacetic anhydride (modified Polonovski reaction) followed by reduction of the intermediate immonium. X-ray analysis of ervatamine shows that the reported configurations of the ethyl chain of both dregamine and tabernaemontanine should be revised. |
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