Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Rauniticine

Akuammigine exists in solution at room temperature as an equilibrium mixture of trans-c/d and cis-c/d conformations [372] and [373], and at low temperatures the 13C NMR spectrum shows signals for both conformations. Comparison of the shifts of C(6) and C(14) in the room temperature spectrum (S 19-2 and 50-3) with those in the separate conformations permits an estimation of the position of equilibrium. (226) Iso-3-rauniticine [374] (228) is shown to adopt the trans-c/d conformation by its similar C(3), C(5), and C(6) shifts to those in [372]. For reference purposes, particularly in connection with the analysis of the 13C NMR spectra of the roxburghines (Section XII.K), 13C shifts for ajmalicine (normal series) and for 3-iso-19-epi-ajmalicine (pseudo series) are shown in [375] and [376]. (226)... [Pg.119]

Rauniticine oxindole A (77) Rauniticine pseudoindoxyl (77) Tetrahydroalstonine (77) Tetrahydroalstonine A/-oxide (77) Uncarine A (77)... [Pg.24]

Since 1957 five new alkaloids belonging to this group have been described rauvanine, raunitidine, rauniticine, neoreserpiline, and holoinine. Other sources, as given, have also been found for ajmalicine, Rauwolfia sumatrana (Miq.) Jack. (33) and R. javanica Koord et Val (34) tetrahydroalstonine, Lochnera lancea Boj. (ex A.DC.) (35) and... [Pg.707]

Selenium dehydrogenation of rauniticine gives alstyrine similarly obtained from ajmalicine. These alkaloids differ only in that raunitidine is a monomethoxyrauniticine. Their IR-spectra (3.4 p) indicates a C/D trans junction with the C-3-H axial. That the D/E junction is cis follows... [Pg.715]

See other pages where Rauniticine is mentioned: [Pg.129]    [Pg.864]    [Pg.365]    [Pg.164]    [Pg.24]    [Pg.24]    [Pg.27]    [Pg.166]    [Pg.167]    [Pg.184]    [Pg.291]    [Pg.693]    [Pg.715]    [Pg.715]    [Pg.715]    [Pg.716]    [Pg.159]    [Pg.168]    [Pg.333]    [Pg.333]    [Pg.168]    [Pg.168]    [Pg.168]    [Pg.168]    [Pg.389]    [Pg.389]    [Pg.425]    [Pg.427]    [Pg.83]    [Pg.97]    [Pg.97]    [Pg.97]    [Pg.97]    [Pg.109]    [Pg.109]    [Pg.109]    [Pg.110]    [Pg.110]    [Pg.110]    [Pg.110]    [Pg.116]    [Pg.117]   
See also in sourсe #XX -- [ Pg.291 , Pg.707 , Pg.715 ]

See also in sourсe #XX -- [ Pg.159 , Pg.168 , Pg.333 ]

See also in sourсe #XX -- [ Pg.389 ]

See also in sourсe #XX -- [ Pg.83 , Pg.116 , Pg.142 ]

See also in sourсe #XX -- [ Pg.9 , Pg.171 ]

See also in sourсe #XX -- [ Pg.9 , Pg.171 ]

See also in sourсe #XX -- [ Pg.57 ]



SEARCH



Rauniticine oxindole

© 2024 chempedia.info