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Seneciphyllic acid

Pyrrolizidine Group.—Evidence from two sources indicates that the Cio necic acids are derived by the coupling of two units derived from isoleucine. Earlier work had indicated that the left-hand C5 unit of seneciphyllic acid (22) is derived from isoleucine and its biological precursors threonine and aspartic acid. Mevalonic acid was not incorporated but the S-methyl group of methionine served as a fairly specific precursor for C-8. [Pg.8]

The gross structure of seneciphyllic acid was established by Adams et al. (205). It was shown to be dibasic by direct titration and by formation of a dimethyl ester. The IR-maximum at 3452 cm. and at 3497 cm.- for the acid and its ester was indicative of a hydroxyl group, which because of its inertness was recognized as tertiary and because of the yellow color given by seneciphyllic acid with ferric chloride was... [Pg.90]

CXXXII a Isoseneciphyllic acid CXXXII b Seneciphyllic acid CXXXII c Riddellic acid CXXXII d Spartiodinecic acid... [Pg.295]

The total synthesis of the seneciphyllic acids has been effected by Edwards et al. (176). The cyanhydrin of 3-rnethylbut-3-en-2-one (CXXXIII) was converted by way of the orthomethyl ester to methyl... [Pg.295]

Seneciphyllic acid, isolated upon alkaline hydrolysis of seneciphylline by Konovalova and Orekhov (37), is unusual among the necic acids in that it showed no optical activity. Titration with standard alkali indicated that it is a dibasic acid. A Zerewitinoff determination indicated the presence of two active hydrogens. [Pg.149]

Hygrophyllinecic acid monolactone, K23.2 Seneciphyllic acid, K23.8 C10H14O5S... [Pg.204]

In 1966, labelled L-threonine and L-isoleucine were observed to be incorporated into the seneciphyllic acid [63]. Similarly, it was described that labelled DL-valine is a precursor of echimidinic acid [64]. The five-membered angeloylic acid is... [Pg.365]

Crout DHG, Berm MH, hnaseki H, Geissman TA (1966) Pyrrolizidine alkaloids. The biosynthesis of seneciphyllic acid. Phytochemistry 5 1—21... [Pg.377]

Sceletium alkaloid A4, K20 Schellhammericine, K7 Schellhammeridine, K7 Schellhammerine, K7 Scillarenin, T49 Sclareol, T34 Sclerotiorins, Yll Scopolamine, K28 Secodaphniphylline, K26 Secoisolariciresinol, Y7 Secologanin, T13 Securinine, K18 Sedamine, K18 Sedridine, K19 Selenium compounds, A18 Selinane, T19 Selinenes, T19 Semi-a-carotene, T54 Senecic acid, K23 Seneciphyllic acid, K23 Seneol, Y19 Senepoxide, Y19 Sequirins, Y9 Serine, A4 Serpentine, K9 Serratenolone, T44 Serratidine, K25 Serratinidine, K25 Serratinine, K25 Serratine, K25 Sesquicarene, T6 Sesquiphellandrene, T2 Sesquiterpenes, T16-32 Sesterterpenes, T41... [Pg.309]

HgO), which is stated to contain one lactone group and no free carboxyl group, and to exhibit a dualism, one form being probably identical with seneciphyllic acid, C10H14O4 see below). ... [Pg.726]

Seneciphyllic acid Scheme 6 Biosynthesis of senecic acid... [Pg.114]

Senecic acid, K23 Seneciphyllic acid, K23 Seneol, Y19 Senepoxide, Y19 Septamycin, Y6 ... [Pg.167]

See other pages where Seneciphyllic acid is mentioned: [Pg.605]    [Pg.606]    [Pg.801]    [Pg.9]    [Pg.86]    [Pg.89]    [Pg.91]    [Pg.92]    [Pg.93]    [Pg.115]    [Pg.116]    [Pg.295]    [Pg.296]    [Pg.309]    [Pg.311]    [Pg.317]    [Pg.107]    [Pg.159]    [Pg.74]    [Pg.344]    [Pg.366]    [Pg.314]    [Pg.190]    [Pg.195]   
See also in sourсe #XX -- [ Pg.89 ]

See also in sourсe #XX -- [ Pg.278 , Pg.295 ]

See also in sourсe #XX -- [ Pg.148 , Pg.159 ]

See also in sourсe #XX -- [ Pg.148 , Pg.159 ]

See also in sourсe #XX -- [ Pg.23 ]

See also in sourсe #XX -- [ Pg.344 ]

See also in sourсe #XX -- [ Pg.605 , Pg.606 ]



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