scholarly journals Synthesis of a Seco iso-Secologanin Aglycone Analogue of Interest toward Secoiridoids and Monoterpene Indole Alkaloids

2021 ◽  
Author(s):  
Hussein Abou-Hamdan ◽  
Régis Guillot ◽  
Cyrille Kouklovsky ◽  
Guillaume Vincent
Keyword(s):  
Indole Alkaloids ◽  
Monoterpene Indole Alkaloids

scholarly journals Chemical Diversity and Bioactivities of Monoterpene Indole Alkaloids (MIAs) from Six Apocynaceae Genera

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 488
Author(s):  
Afrah E. Mohammed ◽  
Zainab H. Abdul-Hameed ◽  
Modhi O. Alotaibi ◽  
Nahed O. Bawakid ◽  
Tariq R. Sobahi ◽  
...  
Keyword(s):  
Biological Activities ◽  
Indole Alkaloids ◽  
Natural Compounds ◽  
Molecular Target ◽  
Chemical Diversity ◽  
Drug Lead ◽  
The Family ◽  
Monoterpene Indole Alkaloids ◽  
Drug Leads ◽  
Anti Hiv

By the end of the twentieth century, the interest in natural compounds as probable sources of drugs has declined and was replaced by other strategies such as molecular target-based drug discovery. However, in the recent times, natural compounds regained their position as extremely important source drug leads. Indole-containing compounds are under clinical use which includes vinblastine and vincristine (anticancer), atevirdine (anti-HIV), yohimbine (erectile dysfunction), reserpine (antihypertension), ajmalicine (vascular disorders), ajmaline (anti-arrhythmic), vincamine (vasodilator), etc. Monoterpene Indole Alkaloids (MIAs) deserve the curiosity and attention of researchers due to their chemical diversity and biological activities. These compounds were considered as an impending source of drug-lead. In this review 444 compounds, were identified from six genera belonging to the family Apocynaceae, will be discussed. These genera (Alstonia, Rauvolfia, Kopsia, Ervatamia, and Tabernaemontana, and Rhazya) consist of 400 members and represent 20% of Apocynaceae species. Only 30 (7.5%) species were investigated, whereas the rest are promising to be investigated. Eleven bioactivities, including antibacterial, antifungal, anti-inflammatory and immunosuppressant activities, were reported. Whereas cytotoxic effect represents 47% of the reported activities. Convincingly, the genera selected in this review are a wealthy source for future anticancer drug lead.

scholarly journals Neuroinflammatory inhibitors from Gardneria nutans Siebold & Zuccarini

RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27085-27091
Author(s):  
Ying-Ying Si ◽  
Wei-Wei Wang ◽  
Qing-Mei Feng ◽  
Zhen-Zhu Zhao ◽  
Gui-Min Xue ◽  
...  
Keyword(s):  
Indole Alkaloids ◽  
Monoterpene Indole Alkaloids ◽  
New Compounds

Four new compounds were isolated from G. nutans. Compounds 1–2 are two rare monoterpene indole alkaloids with the glucosyl moiety located at C-12 and represent the first two examples of enantiomer of ajmaline type monoterpene indole alkaloids.

scholarly journals The chemistry of mavacurane alkaloids: a rich source of bis-indole alkaloids

2021 ◽  
Author(s):  
Audrey Mauger ◽  
Maxime Jarret ◽  
Cyrille Kouklovsky ◽  
Erwan Poupon ◽  
Laurent Evanno ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Indole Alkaloids ◽  
Rich Source ◽  
Monoterpene Indole Alkaloids

This review presents the chemistry of mavacuranes, a subfamily of the monoterpene indole alkaloids, from their isolation, biosynthesis, total synthesis to their tendency to assemble with other partners to form intricate bis-indole alkaloids.

Bioactive monoterpene indole alkaloids from Nauclea officinalis

2019 ◽  
Vol 83 ◽  
pp. 1-5 ◽  
Author(s):  
Yan-Ping Liu ◽  
Qing-Long Liu ◽  
Xiang-Lin Zhang ◽  
Hai-Yuan Niu ◽  
Chun-Yan Guan ◽  
...  
Keyword(s):  
Indole Alkaloids ◽  
Monoterpene Indole Alkaloids

scholarly journals Bioinspired Oxidative Cyclization of the Geissoschizine Skeleton for the Enantioselective Total Synthesis of Mavacuran Alkaloids

2019 ◽  
Author(s):  
Maxime Jarret ◽  
Victor Turpin ◽  
Aurélien Tap ◽  
Jean-Francois Gallard ◽  
Cyrille Kouklovsky ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Oxidative Coupling ◽  
Indole Alkaloids ◽  
Oxidative Cyclization ◽  
Total Syntheses ◽  
Enantioselective Total Synthesis ◽  
Biosynthetic Precursor ◽  
Monoterpene Indole Alkaloids ◽  
Coupling Approach

We report the enantioselective total syntheses of mavacurans alkaloids, (+)-taberdivarine H, (+)-16-hydoxymethyl-pleiocarpamine, (+)-16-epi-pleiocarpamine, and their postulated biosynthetic precursor 16-formyl-pleiocarpamine. This family of monoterpene indole alkaloids is a target of choice since some of its members are subunits of intricate bisindole alkaloids such as bipleiophylline. Inspired by the biosynthetic hypothesis, we explored an oxidative coupling approach from the geissoschizine framework to form the N1-C16 bond. Quaternization of the aliphatic nitrogen was key to achieve the oxidative coupling induced by KHMDS/I<sub>2 </sub>since<sub> </sub>it hides the nucleophilicity of the aliphatic nitrogen and locks the required cis conformation.

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