Dimethamine — A new bimolecular alkaloid from Thermopsis alterniflora
SummaryFrom the epigeal part ofThermopsis alterniflora, in addition to the alkaloids found previously, argentine, argentamine, and a new alkaloid, dimethamine, which is a representative of the bimolecular series, have been isolated. The structure of 3-(3′,4′-dihydro-N-methylcytisin-5′-yl)-N-methylcytisine has been proposed for dimethamine on the basis of IR, UV, mass, and NMR spectra and also from its conversion products.
Chinolizidinalkaloide: Konstitution und Konfiguration von Tinctorin aus Genista tinctoria L.
Die Struktur eines neuen Chinolizidinalkaloides aus Genista tinctoria L. wird auf Grund spektroskopischer und chemischer Befunde im Sinne von (–)-N-Methyl-11-(prop-2-enyl)-cytisin = Tinctorin 1 geklart. Die optischen Antipoden der Hydrierungsprodukte sind durch Partialsynthese aus (–)-Angustifolin 2 zuganglich.
STUDIES ON LUPIN ALKALOIDS. 3. ABSOLUTE CONFIGURATIONS OF LUPIN ALKALOIDS. II.
The chemical interrelations between (+)-epilupinine (IX) and (-)-anagyrine (I), and then between I and (-)-cytisine (XII) were carried out. Consequently the absolute configurations of (-)-anagyrine (I), (-)-cytisine (XII) and related alkaloids were clarified.