Ultraviolet Spectra of Alkaloids

Sangster, Alfred W.; Stuart, K. L.

doi:10.1021/cr60233a003

Cited by 304 publications

(124 citation statements)

References 102 publications

(138 reference statements)

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“…spectrum of BNC-1 (h,,, 250 mp, log, 3.8) was similar to that of 5 (15) and indicative of the vinyl amide grouping as in 7. Such a grouping was further suggested by the i.r.…”

Section: Introductionmentioning

confidence: 78%

5,6-Dehydrolupanine, a New Alkaloid, and Lupanine from Thermopsis rhombifolia (Nutt.) Richards

Cho¹,

Martin²

1971

Can. J. Chem.

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“…spectrum of BNC-1 (h,,, 250 mp, log, 3.8) was similar to that of 5 (15) and indicative of the vinyl amide grouping as in 7. Such a grouping was further suggested by the i.r.…”

Section: Introductionmentioning

confidence: 78%

5,6-Dehydrolupanine, a New Alkaloid, and Lupanine from Thermopsis rhombifolia (Nutt.) Richards

Cho¹,

Martin²

1971

Can. J. Chem.

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“…The UV data of compound 4 indicated an Amaryllidaceae alkaloid of the 5,10b-ethanophenanthridine type, with a dioxyaryl chromophore [15] [16]. The presence of two s at d(H) 6.57 and 6.80 in the 1 H-NMR spectrum, assigned to the two aromatic signals for HÀC (7) and HÀC(10), respectively, indicated disubstitution at C(8) and C(9) [17], and the appearance of two olefinic signals at d(H) 6.63 (d, HÀC(1)) and 5.96 (dd, HÀC(2)) indicated the presence of a D 1 C¼C bond and a substituent at C(3).…”

mentioning

confidence: 99%

Phytochemical and Biological Investigation of Hymenocallis littoralisSalisb.

Abou‐Donia

Toaima

Hammoda

et al. 2008

Chemistry & Biodiversity

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A phytochemical investigation of the bulbs and flowers of Hymenocallis littoralis SALISB., cultivated in Egypt, was carried out, which resulted in the isolation of four alkaloids, lycorine (1), hippeastrine (2), 11-hydroxyvittatine (3), and (+)-8-O-demethylmaritidine (4), and of two flavonoids, quercetin 3'-O-glucoside (5), and rutin (6). The volatile constituents of the plant flowers were analyzed for the first time by GC/MS, which led to the identification of 26 known compounds (Table 1). Finally, the antimicrobial activity of the petroleum ether extract of the flowers of H. littoralis was investigated.

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“…The IR spectrum showed bands at 3340 and 1634 cm À1 due to NH and conjugated ketone functions, respectively. The UV spectrum showed absorption maxima at 239 and 313 nm, characteristic of a 2-acylindole chromophore [26]. The EI-MS of 5 showed a molecular ion at m/z 282, which corresponds to C 17 (6), which is also in a-position to the indole moiety.…”

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confidence: 99%

Biologically Active Ibogan and Vallesamine Derivatives from Tabernaemontana divaricata

Kam

Pang

Choo

et al. 2004

Chemistry & Biodiversity

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Six new indole alkaloids, viz., (3S)-3-cyanocoronaridine (2), (3S)-3-cyanoisovoacangine (3), conolobine A (5), conolobine B (6), conolidine (7), and (3R/3S)-3-ethoxyvoacangine (8), in addition to 36 known ones, were obtained from the stem-bark extract of the Malayan Tabernaemontana divaricata. The structures were determined by NMR and MS analysis. The CN-substituted alkaloids showed appreciable cytotoxicity towards the KB human oral epidermoid carcinoma cell-line.

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Ultraviolet Spectra of Alkaloids

Cited by 304 publications

References 102 publications

5,6-Dehydrolupanine, a New Alkaloid, and Lupanine from Thermopsis rhombifolia (Nutt.) Richards

5,6-Dehydrolupanine, a New Alkaloid, and Lupanine from Thermopsis rhombifolia (Nutt.) Richards

Phytochemical and Biological Investigation of Hymenocallis littoralisSalisb.

Biologically Active Ibogan and Vallesamine Derivatives from Tabernaemontana divaricata

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