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Catharanthus lanceus

Vinca lancea, more properly named Catharanthus lanceus (Boj. ex A.DC.) Pich. and indigenous to Madagascar, has been shown to contain yohimbine (73), ajmalicine (74), tetrahydroalstonine, and a new base (75) with a j8-anilinoacrylate chromophore, lanceine, C20H26N2O3 or C24H30N2O4, mp 198°, [a]D +64° (EtOH) and +62° (CHCI3). The latter compound, upon lithium aluminum hydride reduction, yielded an indoline that was readily acetylated. [Pg.282]

Catharanthus lanceus, Rauwolfia serpentina (Apocvnaceae), Pausinystaliayohim.be (Rubiaceae) [yohimbe bark]... [Pg.180]

Catharanthus lanceus, Rauwofia serpentina (Apocynaceae), Pausinystaliayohimbe (yohimbe) (Rubiaceae) [bark]... [Pg.184]

A group of bases with various C(17)- and Na-substituents in an aspidospermine skeleton have been obtained from Aspidosperma cylindrocarpon, in which the C(5)-side chain occurs as CHOHCOjMe or CH2C02Me. 6,7-Epoxy-20-hydroxytabersonine types have been obtained from Catharanthus lanceus and iVa-formylkopsinol from A. verbascifoliumP ... [Pg.180]

The Eli Lilly team isolated from a Madagascan Catharanthus roseus VLB-sulphate, as well as the new alkaloid leurosine (vinleurosine, VLR), which is chemically closely related to VLB. Leurosine has also been isolated from Catharanthus lanceus Pich. ... [Pg.484]

The roots of Catharanthus lanceus Baj ex A. DC. have afforded another new /3-anilinoacrylate alkaloid (13). From the UV and IR spectra and the high negative optical rotation, the alkaloid was determined to be a member of the /3-anilinoacrylate series. The NMR spectrum confirmed the NH and carbomethoxyl groups and also showed four aromatic protons. Two olefinic protons were observed at 5.9 ppm, confirming the unsaturation at C-14-C-15. The C-18 methyl group appeared as a doublet (J = 7.0 Hz) at... [Pg.205]

Horhammericine (41) was isolated by Abraham and co-workers from the roots of Catharanthus lanceus (29) and horhammerinine (43) from the leaves of C. lanceus (30). [Pg.214]

Callichilia Hedanthera) barteri (Hook, f.) Pichon Calliehilia stenosepala Stapf Callichilia subsessilis Stapf Catharanthus lanceus Boj. ex A. DC. (see Vinca lancea K. Schum.)... [Pg.18]

Blomster RN, Martello RE, Farnsworth NR, Draus FJ 1964 Studies on Catharanthus lanceus. V. Preparation of root alkaloid fractions and the isolation of ajmalicine, yohimbine, pericalline, perimivine and cathalanceine. Lloydia 27 480-485... [Pg.1124]

See other pages where Catharanthus lanceus is mentioned: [Pg.139]    [Pg.223]    [Pg.407]    [Pg.268]    [Pg.25]    [Pg.99]    [Pg.1110]    [Pg.1119]   
See also in sourсe #XX -- [ Pg.282 ]

See also in sourсe #XX -- [ Pg.205 , Pg.214 , Pg.224 , Pg.228 , Pg.268 , Pg.269 ]

See also in sourсe #XX -- [ Pg.18 , Pg.99 , Pg.119 , Pg.216 ]

See also in sourсe #XX -- [ Pg.1110 , Pg.1119 ]



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