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18-Desoxy-Wieland-Gumlich aldehyde

All dimeric curare alkaloids are derived from the monomeric units Wieland-Gumlich aldehyde (32) and 18-desoxy-Wieland-Gumlich aldehyde (34) or their respective iV(j,)-metho-salts (33) and (35). The key substance for the synthesis of the dimeric calabash alkaloids is therefore Wieland-Gumlich aldehyde (32). Under the name caracurine VII it has been isolated from the South American Strychnos toxifera F. Schomb. and S. subcordata Spruce in the form of its V(j,)-metho-salt (= alkaloid 8 = hemitoxiferine = caracurine VII metho-salt). [Pg.209]

Acid-catalysed hydrolysis of C-dihydrotoxiferine under oxygen-free conditions gives 18-desoxy-Wieland-Gumlich aldehyde metho-salt (35) (hemi-dihydrotoxi-ferine), which on warming in dilute acetic acid condenses back to C-dihydro-toxiferine (46). [Pg.210]

Wieland-Gumlich aldehyde (open form) = CHgOH 18-Desoxy-Wieland-Gumlich aldehyde Ri =Me... [Pg.65]

Desoxy-Wieland-Gumlich aldehyde metho salt... [Pg.65]

Among the examples of artefacts cited by Gorman et al. (267) are toxiferine (4d) and dihydrotoxiferine (4f). As pointed out above, 18-desoxy-Wieland-Gumlich aldehyde metho salt (2e) is not known to occur naturally in Strychnos species, but on warming in the presence of acid it dimerizes very rapidly to 4f, the isolation of which from an extract is no proof that it was present in the original material. However, the occurrence of calebassine (cf. Scheme 1.1) as a main alkaloid is taken to indicate the natural existence of 4f (267). [Pg.69]

Desoxy-Wieland-Gumlich aldehyde = Nor-dihydrofluororcurarine = Nor-hemi-dihydrotoxiferine... [Pg.150]

Desoxy-Wieland-Gumlich aldehyde metho salt = Dihydrofluorocurarine 2,16-Didehydro-18-desoxy-Wieland-Gumlich aldehyde metho salt = Fluorocurarine... [Pg.150]

Dimethylisochondrodendrine = Cycleanine Dihydrofluorocurarine = 18-Desoxy-Wieland-Gumlich aldehyde metho salt 0,0-Dimethylwarifteine = 0-Methylcissampareine... [Pg.150]

Hemi-dihydrotoxiferine = 18-Desoxy-Wieland-Gumlich aldehyde metho salt Hemitoxiferine [I] = Wieland-Gumlich aldehyde metho salt Homomoschatoline = 0-Methylmoschatoline 0-Methylcissampareine = Dimethylwarifteine Nor-dihydrofluorocurarine = 18-Desoxy-Wieland-Gumlich aldehyde Nor-hemi-dihydrotoxiferine = 18-Desoxy-Wieland-Gumlich aldehyde Profluorocurine = C-Alkaloid Y... [Pg.150]

Tertiary bases nordihydrotoxiferine, 18-desoxy-Wieland-Gumlich aldehyde 0.52% Quaternary bases containing ca. 40 components (2D-PC), incl. fluorocurine, fluorocurarine, calebassinine, curarine, calebassine, C-alkaloids D-G, and 15 others... [Pg.374]

Tertiary bases diaboline, Wieland-Gumlich aldehyde, 18-desoxy-Wieland-Gumlich aldehyde Much alkaloid present... [Pg.374]

Dimeric indole alkaloids such as C-toxiferine I, nor-dihydrotoxiferine, and curarine V are derived from Wieland-Gumlich aldehyde and 18-desoxy-Wie-land-Gumlich aldehyde or their corresponding Nb-methosalts (123). [Pg.241]

See other pages where 18-Desoxy-Wieland-Gumlich aldehyde is mentioned: [Pg.212]    [Pg.325]    [Pg.241]    [Pg.64]    [Pg.212]    [Pg.325]    [Pg.241]    [Pg.64]    [Pg.64]   
See also in sourсe #XX -- [ Pg.36 ]



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Wieland-Gumlich aldehyde

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