Names | |
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IUPAC name Methyl (20βH)-3-oxo-19,20-dihydrovobasan-17-oate | |
Systematic IUPAC name Methyl (2S,5S,6S,14S)-5-ethyl-3-methyl-8-oxo-2,3,4,5,6,7,8,9-octahydro-1H-2,6-methanoazeceno[5,4-b]indole-14-carboxylate | |
Identifiers | |
3D model (JSmol) | |
ChEBI | |
ChEMBL | |
ChemSpider | |
PubChem CID | |
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Properties [1] | |
C21H26N2O3 | |
Molar mass | 354.450 g·mol−1 |
Melting point | 207 °C (405 °F; 480 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Tabernaemontanine is a naturally occurring monoterpene indole alkaloid found in several species in the genus Tabernaemontana including Tabernaemontana divaricata .
Tabernaemontanine was first reported in 1939 [1] but its structure was only fully confirmed in the 1970s as there was confusion in the original literature regarding the configuration of the ethyl group in the piperidine ring of this alkaloid and its isomer dregamine, so that their identities had been reversed. [2] [3] [4] Both compounds were isolated from plants of the dogbane (Apocynaceae) family including Tabernaemontana coronaria . [5] They have structures that are reduced versions of vobasine.
As with other Indole alkaloids, the biosynthesis of tabernaemontanine starts from the amino acid tryptophan. This is converted into strictosidine before further elaboration. [6]
Tabernaemontanine is found commonly in the genera Tabernaemontana and Kopsia , [7] including the species Ervatamia hirta , [8] Tabernaemontana elegans [9] and Tabernaemontana divaricata . [10] [11] The latter species is known to produce many other alkaloids including catharanthine, ibogamine and voacristine. [12]
Plant metabolites have been of interest for their possible biological activity and alkaloids in particular are major subjects for ethnobotanical research. [13] [14] Tabernaemontanine has been studied, for example as a potential anti-cancer agent, [15] [16] [17] [18] for its antimalarial activity [19] [20] and in antifertility research. [21] However, the alkaloid itself has not been developed as a drug.
Gramine is a naturally occurring indole alkaloid present in several plant species. Gramine may play a defensive role in these plants, since it is toxic to many organisms.
Voacangine is an alkaloid found predominantly in the root bark of the Voacanga africana tree, as well as in other plants such as Tabernanthe iboga, Tabernaemontana africana, Trachelospermum jasminoides, Tabernaemontana divaricata and Ervatamia yunnanensis. It is an iboga alkaloid which commonly serves as a precursor for the semi-synthesis of ibogaine. It has been demonstrated in animals to have similar anti-addictive properties to ibogaine itself. It also potentiates the effects of barbiturates. Under UV-A and UV-B light its crystals fluoresce blue-green, and it is soluble in ethanol.
Indole alkaloids are a class of alkaloids containing a structural moiety of indole; many indole alkaloids also include isoprene groups and are thus called terpene indole or secologanin tryptamine alkaloids. Containing more than 4100 known different compounds, it is one of the largest classes of alkaloids. Many of them possess significant physiological activity and some of them are used in medicine. The amino acid tryptophan is the biochemical precursor of indole alkaloids.
Vincamine is a monoterpenoid indole alkaloid found in the leaves of Vinca minor, comprising about 25–65% of its indole alkaloids by weight. It can also be synthesized from related alkaloids.
Tabernaemontana corymbosa is a species of plant in the family Apocynaceae. It is native to Brunei, China, Indonesia, Laos, Malaysia, Myanmar, Singapore, Thailand, and Vietnam. Glossy green leaves and faintly sweet scented flower. Flowers continuously all year. Frost tolerant. Grows to about 2 metres. Likes full sun to part shade. A number of cultivars are available.
Ibogamine is an anti-convulsant, anti-addictive, CNS stimulant alkaloid found in Tabernanthe iboga and Crepe Jasmine. Basic research related to how addiction affects the brain has used this chemical.
Voacamine, also known under the older names voacanginine and vocamine, is a naturally occurring dimeric indole alkaloid of the secologanin type, found in a number of plants, including Voacanga africana and Tabernaemontana divaricata. It is approved for use as an antimalarial drug in several African countries. Voacamine exhibits cannabinoid CB1 receptor antagonistic activity.
Tabernaemontana elegans, the toad tree, is a shrub or small tree in the family Apocynaceae. It is native to eastern Africa.
Akuammicine is a monoterpene indole alkaloid of the Vinca sub-group. It is found in the Apocynaceae family of plants including Picralima nitida, Vinca minor and the Aspidosperma.
Affinine is a monoterpenoid indole alkaloid which can be isolated from plants of the genus Tabernaemontana. Structurally it can be considered a member of the vobasine alkaloid family and may be synthesized from tryptophan. Limited pharmacological testing has indicated that it may be an effective inhibitor of both acetylcholinesterase and butyrylcholinesterase.
Affinisine is a monoterpenoid indole alkaloid which can be isolated from plants of the genus Tabernaemontana. Structurally, it can be considered a member of the sarpagine alkaloid family and may be synthesized from tryptophan via a Pictet-Spengler reaction.
Stemmadenine is a terpene indole alkaloid. Stemmadenine is believed to be formed from preakuammicine by a carbon-carbon bond cleavage. Cleavage of a second carbon-carbon bond is thought to form dehydrosecodine. The enzymes forming stemmadenine and using it as a substrate remain unknown to date. It is thought to be intermediate compound in many different biosynthetic pathways such as in Aspidosperma species. Many alkaloids are proposed to be produced through intermediate stemmadenine. Some of them are:
Apparicine is a monoterpenoid tricyclic indole alkaloid. It is named after Apparicio Duarte, a Brazilian botanist who studied the Aspidosperma species from which apparicine was first isolated. It was the first member of the vallesamine group of indole alkaloids to be isolated and have its structure established, which was first published in 1965. It has also been known by the synonyms gomezine, pericalline, and tabernoschizine.
Dregamine is a naturally occurring monoterpene indole alkaloid found in several species in the genus Tabernaemontana including Ervatamia hirta and Tabernaemontana divaricata.
Conophylline is a autophagy inducing vinca alkaloid found in several species of Tabernaemontana including Ervatamia microphylla and Tabernaemontana divaricata. Among its many functional groups is an epoxide: the compound where that ring is replaced with a double bond is called conophyllidine and this co-occurs in the same plants.
Ervaticine is a 2-acylindole alkaloid. It occurs in Ervatamia coronaria and Tabernaemontana divaricata.
Vobasine is a naturally occurring monoterpene indole alkaloid found in several species in the genus Tabernaemontana including Tabernaemontana divaricata.
Voacristine is a indole alkaloid occurring in Voacanga and Tabernaemontana genus. It is also an iboga type alkaloid.
Vinervine is a monoterpene indole alkaloid of the Vinca sub-group. It is a derivative of akuammicine, with one additional hydroxy (OH) group in the indole portion, hence it is also known as 12-hydroxyakuammicine.
19,20-Dihydroervahanine A is an alkaloid, a natural product which is found in the root of the Southeast Asian plant Tabernaemontana divaricata. It inhibits acetylcholinesterase in vitro more potently than galantamine.