Leontice

L. angustifolius and is, like sparteine, probably found in all lupine species in different concentrations, from main compounds to mere traces. Lupanine is the main alkaloid in the seeds of Lupinus rotundiflorus, Lupinus exaltatus and Lupinus mexicanus. It has been discovered in considerable amounts in Lupinus mon-tanus and Lupinus madrensis, but only traces were noted in Lupinus elegans. Moreover, lupanine occurs in Cytisus scoparius and Leontice eversmannif-. ... 

Leontice alberti Rgl. (181), L. Smirnovii Traut. (182), Ca-moensia maxima Welw. ex. Benth. (183)... 

Leontiformine (68) was isolated from the aboveground portion of Leontice leon-topetalum L. 114-116). There is a band at 1660 cm" in its IR spectrum that is... 

Leontidine was obtained from Leontice and Camoensia (181-183). The pres-cence of a-pyridine ring was evidenced by UV and H-NMR spectroscopy. The IR spectrum showed a transquinolizidine system (2800-2700 cm" ). 

Sophoridine was isolated from Sophora alopecuroides L. (190,191), Lep-torhabdos parviflora Benth. (192), S. flavenscens Ait. (22), and Euchresta jap-onica Benth. (40). (-l-)-Sophoridine was also isolated from Leontice albertii Rgl. (196,197). The structure of the carbon-nitrogen skeleton was established with the formation of octodehydromatrine (177) on dehydrogenation over palladized... 

Albertidine, isolated from Leontice Albertii Rgl. (196,197), is a crystalline, optically active tribase. There are IR absorption bands for a trani-quinolizidine system at 2750 and 2793 cm and a six-membered lactam carbonyl at 1640 cm The absorption in the fingerprint region is similar to that of matrine. The mass spectrum of albertidine is characterized by ion peaks at miz 247 (M -1), 219, 205, 192, 177, 150, 137, 98, and 96 which are typical for matrine alkaloids (209). On the basis of spectroscopic data and taking into account the tranj-quinolizidine band in the IR spectrum, the probable structure 182, with rings A/B-trans, was proposed. 

Darvasine, isolated from Leontice darvasica Rgl. (210,211), is a monoacidic tribase. There are absorption bands in its IR spectrum that are typical for a double bond (1670 cm i) and a lactam (1645 cm ). There is one UV maximum at 244... 

Albertine, isolated from Leontice Albertii Rgl. (216,226,227), is an optically active monoacidic tribase. There are the absorption bands at 1655 (lactam carbonyl), 1675 (double bond), 2795-2760 (tra i-quinolizidine), and 3300 cm (hydroxyl group) in the IR spectrum. The UV spectrum shows an absorption maximum at 224 nm (log e = 4.2) for a —C=C——C=0 group. Albertine... 

Albertamine, (-)-leontalbamine, and (+)-leontismidine were isolated from Leontice albertii and L. Smirnovii (228,229). They have the same composition, C,5H24N202. The IR spectra of these alkaloids are characterized by the absorption bands giving evidence for the presence of hydroxyl and amide carbonyl groups. There is also absorption (except in the albertamine spectrum) in the region of 2700-2800 cm attributed to trans-quinolizidine systems. The UV spectra show absorption maxima at 220 nm. 

S. Barisic, A. Bjelis, i. R. Cooper and B. Leontic (eds.), Quasi One-Dimensional Conductors I , Lecture Notes in... 

Barisic, S., Bjelis, A., Cooper, J. R., Leontic, B. (Eds.) Quasi One-Dimensional Conductors I, Lecture Notes in Physics 95 Springer-Verlag, New York 1979... 

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