Results 151 to 160 of about 2,045 (191)

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
openaire   +2 more sources

Kopsileuconines A-D: bisindole alkaloids with cytotoxic activity from Kopsia hainanensis.

Phytochemistry
Kopsileuconines A-D (1-4), four monoterpenoid bisindole alkaloids with unprecedented skeletons, along with their biosynthetically related precursors (5-8) were isolated from the roots of Kopsia hainanensis.
Ni‐Ping Li, Sha Chen, Wei-Fang Su, Fen Liu, Lianxin Li, Jianguo Song, Min-Jing Cheng, Yi-Yi Li, Runqiang Chen, Xue-Ping Lei, Wen-Cai Ye, Lei Wang   +11 more
semanticscholar   +1 more source

Bisindoles. 30. Acid condensation of bisindoles with aromatic aldehydes and the synthesis of new endole-containing polyamines

Chemistry of Heterocyclic Compounds, 1993
Reaction of 2,2′-diethoxycarbonyl-bis(5-indolyl)sulfone with benzaldehyde gave an active dibromide — 2,2′diethoxycarbonyl-3,3′-di(bromobenzyl)bis(5-indolyl)sulfone; derivatives of di(bisindolyl)phenylmethane have been prepared by condensation of 2,2′-diethoxycarbonyl-bis (N-methyl-5-indolyl)sulfone with benzaldehyde and p-methoxybenzaldhyde.
N. N. Ovsyannikova, Sh. A. Samsoniya, N. N. Suvorov, N. A. Kogan   +3 more
openaire   +1 more source

A De Novo Synthesis of Bisindole Alkaloid Geissolosimine: Collective Synthesis of Geissoschizoline, Akuammicine, (16S)-deshydroxymethylstemmadenine and Aspidospermatan Alkaloids

Organic Chemistry Frontiers
In this study, we accomplished a de novo synthesis of bisindole alkaloid geissolosimine. Geissoschizoline, the north fragment of geissolosimine was first prepared in 15 steps (longest linear sequence, LLS) by...
Jiahang Yan, Yanxia Zhen, Pengyan Wang, Yimeng Han, Huanhuan Zou, Junhan Chen, Weigang He, Weiqing Xie   +7 more
semanticscholar   +1 more source

Bisindole-based small molecules as transmembrane anion transporters and potential anticancer agents.

Organic and biomolecular chemistry
Few synthetic ion transporters have been reported incorporating indole as the core moiety. We have developed a novel bisindole-based transporter capable of efficient transmembrane anion antiport.
S. Salunke, Shreyada N. Save, Naveen J Roy, Ronedy Naorem, Shilpy Sharma, Pinaki Talukdar   +5 more
semanticscholar   +1 more source

New Synthetic Protocol for the Preparation of Unsymmetrical Bisindoles.

ChemInform, 2006
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, please click on HTML or PDF.
Hanns Martin, Kaiser, Wei Fun, Lo, Abdol Majid, Riahi, Anke, Spannenberg, Matthias, Beller, Man Kin, Tse   +5 more
openaire   +2 more sources

The Sources, Structures and Cytotoxicity of Animal‐Derived Bisindole Compounds

Chemistry and Biodiversity
Bisindole compounds constitute a significant class of natural compounds distinguished by their characteristic bisindole structure and renowned for their anticancer properties.
Zi-long Zhang, Haonan Xu, Chuanming Gong, Yu-ze Li, Yi-ming Li, Xiaomei Song, Rui Wang, Dongdong Zhang   +7 more
semanticscholar   +1 more source

Leucophyllinines A and B, bisindole alkaloids from Leuconotis eugeniifolia

Journal of Natural Medicines, 2019
Two new bisindole alkaloids, leucophyllinines A (1) and B (2) consisting of eburnane and quebrachamine-type skeletons were isolated from the bark of Leuconotis eugeniifolia, and their structures were elucidated on the basis of spectroscopic data. Leucophyllinines A and B showed antiplasmodial activities against Plasmodium falciparum 3D7.
Tang, Yiming, Nugroho, Alfarius Eko, Hirasawa, Yusuke, Tougan, Takahiro, Horii, Toshihiro, A. Hadi, A. Hamid, Morita, Hiroshi   +6 more
openaire   +3 more sources

Gold(I)‐Catalyzed Regioselective Cycloisomerization of Bis(indol‐3‐yl)‐ynamides to Access Five‐membered Ring Linked Bisindole Derivatives

Advanced Synthesis & Catalysis
A gold(I)‐catalyzed regioselective cycloisomerization of bis(indol‐3‐yl)‐ynamides for the rapid construction of five‐membered ring linked bisindole derivatives has been reported, affording the desired products in the range of 72% ‐ 94% yields under mild ...
Zhanshuai Xiao, Yin Wei, Min Shi
semanticscholar   +1 more source

Synthesis, structural modification, and biological activity of a novel bisindole alkaloid iheyamine A.

Bioorganic chemistry (Print)
Diseases caused by plant viruses and pathogens pose a serious threat to crop yield and quality. Traditional pesticides have gradually developed drug resistance and brought certain environmental safety issues during long-term overuse.
Xin Guo, Peiyao Zhang, Miaomiao Chen, Taiqing Li, C. Hou, Xinyu Que, Li Xu, Zhenghong Zhou, Qingmin Wang, Ziwen Wang   +9 more
semanticscholar   +1 more source