Results 141 to 150 of about 1,584 (196)

Bisindole alkaloids from Tabernaemontana corymbosa

Phytochemistry, 2018
Continued study in bioactive monoterpenoid alkaloids led to the isolation of nine undescribed alkaloids, taberyunines A-I, together with 32 known ones from the aerial parts of Tabernaemontana corymbosa Roxb. ex Wall (Apocynaceae). Among the undescribed alkaloids, taberyunines A-G and H-I were assigned to Aspidosperma-Aspidosperma and Vobasinyl-Ibogan ...
Bing-Jie, Zhang, Jing-Song, Lu, Mei-Fen, Bao, Xiu-Hong, Zhong, Ling, Ni, Jing, Wu, Xiang-Hai, Cai   +6 more
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ChemInform Abstract: Bisindole Alkaloids

ChemInform, 2009
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Toh‐Seok Kam, Yeun‐Mun Choo
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Anticancer activity of bisindole alkaloids derived from natural sources and synthetic bisindole hybrids

Archiv der Pharmazie, 2020
AbstractThe bisindole moiety, as a versatile pharmacophore, is one of the widespread heterocycles in naturally occurring and synthetic bioactive compounds. The bisindole alkaloids derived from natural sources possess structural and mechanistic diversity, and they were found to be generally more active than monoindole alkaloids against various cancer ...
Yue Zhang, Chunhong Hu
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Monoterpenoid Bisindole Alkaloids

2016
This chapter covers the literature on bisindole alkaloids consisting of monoterpenoid indoles, published up to June 2015. Bisindole alkaloids isolated from plants belonging to the families Apocynaceae and Loganiaceae, including Iboga-vobasine type, Aspidosperma-Aspidosperma type, eburnan-Aspidosperma type, Strychnos-Strychnos type, macroline-macroline ...
Mariko, Kitajima, Hiromitsu, Takayama
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Synthesis of Marine Sponge Bisindole Alkaloids Dihydrohamacanthins

Organic Letters, 2002
[structure: see text] A convergent synthesis of the marine sponge bisindole alkaloids dihydrohamacanthins is described. The synthesis centers on the construction of 3,5- and 3,6-linked pyrazinones and their reduction to the requisite piperazinones with sodium cyanoborohydride.
Fumiko Y, Miyake, Kenichi, Yakushijin, David A, Horne   +2 more
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Bisindole alkaloid artifacts from Gonioma malagasy

Tetrahedron Letters, 2013
Abstract Three new bisindole alkaloids ( 1 – 3 ), possessing a rare carbon skeleton formed by two indole moieties fused via a dihydropyran unit, were isolated from the alkaloid extract of the stem bark of Gonioma malagasy . Their structure and absolute configuration were assigned thanks to a combination of one and two dimensional NMR spectroscopy ...
Beniddir, Mehdi A, Martin, M. T., Tran, Huu Dau Marie Elise, Rasoanaivo, Philippe, Guéritte, Francoise, Litaudon, Marc   +5 more
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New Bisindole Alkaloids from Petchia Ceylanica

HETEROCYCLES, 1988
Two new bisindole alkaloids, ceylanine and ceylanicine, habe been isolated from Petchia ceylanica and their structures have been established on the basis of spectroscopic ...
_ Atta-ur-Rahman, Azra Pervin, Anjun Muzaffar, Kuruneruge Tuley Dayanada de Silva, Wellage Susil Jayalath Silva   +4 more
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New Bisindole Alkaloids from Tabernaemontana corymbosa

Journal of Natural Products, 2002
Ten new bisindole alkaloids of the vobasinyl-ibogan type, viz., conodiparines A-F (1-6), conodutarines A and B (7, 8), and cononitarines A and B (9, 10), were obtained from the leaf extract of the Malayan species Tabernaemontana corymbosa. The structures were determined using NMR and MS analysis.
Toh-Seok, Kam, Kooi-Mow, Sim, Huey-Shen, Pang   +2 more
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Alternative partial synthesis of bisindole alkaloids

Tetrahedron Letters, 1990
Abstract Indoline derivatives of the pericyclivine series are oxidized at position 6 with DDQ; the corresponding alcohols are coupled with nucleophilic indolines under acid conditions to yield dimers similar to undulatine.
G. Massiot, J.M. Nuzillard, B. Richard, L. Le Men-Olivier   +3 more
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Biologically active indole and bisindole alkaloids from Tabernaemontana divaricata

Organic & Biomolecular Chemistry, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Kam, Toh-Seok, Pang, Huey-Shen, Lim, Tuck-Meng   +2 more
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