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Vinca elegantissima

Methoxy tetraphy llicine] Vinca elegantissima var. Vinca meg or 83... [Pg.281]

A full structural analysis of an alkaloid from Vinca elegantissima led to the assignment of a structure previously given - to isomajdine. The melting points reported for the two alkaloids are effectively identical. [Pg.195]

Vincarpin and Dihydrovincarpin are two additional examples of pseudo-cross-conjugated mesomeric betaines. They were isolated from Vinca major elegantissima (76TL4887) (Scheme 82). [Pg.137]

Two new zwitterionic alkaloids with a 5,6-dihydroindolo[2,3-a]quinolizine ring system have been isolated from Vinca major L. var. elegantissima Hort (13). The structures of vincarpine (4) and dihydrovincarpine (5) have been determined on the basis of their spectral data and via some derivatives obtained by either catalytic or hydride reduction. Interestingly, the H-NMR spectrum of vincarpine in TFA solution corresponds to structure 6 derived by lactonization of 4 in the presence of acid. [Pg.144]


See other pages where Vinca elegantissima is mentioned: [Pg.203]    [Pg.215]    [Pg.203]    [Pg.215]    [Pg.165]    [Pg.93]    [Pg.136]   
See also in sourсe #XX -- [ Pg.93 ]




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