Chemical investigation of Cedrela toona
TL;DR: Occurrence of 1,2-dihydrocedrelone, a new tetranortriterpenoid, provides further interesting evidence of the chemotaxonomic feature of Meliaceae.
...read more
Abstract: Two varieties of Cedrela toona Roxb. are available in West Bengal and the seeds of one variety produces cedrelone, 1,2-dihydrocedrelone, bergapten and β-sitosterol. Occurrence of 1,2-dihydrocedrelone, a new tetranortriterpenoid, provides further interesting evidence of the chemotaxonomic feature of Meliaceae .
...read more
Citations
More filters
TL;DR: This paper aims to demonstrate the efforts towards in-situ applicability of EMMARM, as to provide real-time information about concrete mechanical properties such as E-modulus and compressive strength.
...read more
Abstract: Natural Science Foundation of China[30000213, 30370160, 30670214]; National Basic Research Program of China (973 Program)[2009CB522300]; Chinese Academy of Sciences
...read more
315 citations
TL;DR: From a literature search for reports on the chemical constituents of these plants, most constituents were found to be quinone derivatives or other compounds with unsaturated carbonyl groups.
...read more
Abstract: Seventy-five Myanmar timber extracts belonging to 27 families were examined for their leishmanicidal activities. Some timber extracts had significant leishmanicidal activity, especially extracts of Millettia pendula, which exhibited the most potent activity (MLC 3.1 μg/ml, MIC 1.6 μg/ml). Other timber extracts showing potent activity included those from Cedrela serrata, Cedrela toona, Cordia fragrantissima, Calophyllum kunstleri, Dalbergia cultrate, Grevillea robusta, Haplophragma adenophyllum, Michelia champaca, and Tectona grandis. From a literature search for reports on the chemical constituents of these plants, most constituents were found to be quinone derivatives or other compounds with unsaturated carbonyl groups.
...read more
68 citations
TL;DR: Results show that cedrelone was the most effective in reducing rust pustule emergence, indicating the importance of specific structural features for activity.
...read more
Abstract: Natural tetranortriterpenoids such as cedrelone from Toona ciliata, azadiradione from Azadirachta indica, limonin, limonol and nomilinic acid from Citrus medica, along with some cedrelone derivatives were tested for their antifungal activity against Puccinia arachidis, a groundnut rust pathogen. Results show that cedrelone was the most effective in reducing rust pustule emergence. Replacement of functional groups or modification of the A or the B ring in cedrelone reduced the effectiveness indicating the importance of specific structural features for activity.
...read more
58 citations
01 Jan 1984-
Abstract: The purpose of this article is to review the chemistry of the limonoids isolated from plants of the natural order Meliaceae; limonoids from the Rutaceae and Cneoraceae are not included. The chemistry of the limonoids was last reviewed in this series by Dreyer (84); a more recent review is by Connolly, Overton and Polonsky (73). Taxonomic aspects have been reviewed recently by the present author (199), and chemistry and phyto-chemistry have been discussed at a recent meeting (81). The present article sets out to review advances in limonoid chemistry since the last review in this series (84); the tables however are intended to be comprehensive.
...read more
58 citations
TL;DR: Evolutionary trends of meliacin chemistry thus correspond to the morphological division of the Meliaceae, according to their basic skeletal specialization and state of oxidation.
...read more
Abstract: The structural types of limonoids or meliacins can be characterized in terms of complexity by their position along biosynthetic routes on a biogenetic map, as well as by their basic skeletal specialization and state of oxidation. Genera of the Melioidease, one major subfamily of the Meliaceae, contain meliacins formed along several biosynthetic routes and characterized by relatively low skeletal specializations and oxidation states. Genera of the Swietenioideas, the other major subfamily of the Meliceae, contain meliacins formed along only one biosynthetic route and characterized by relatively high skeletal specializations and oxidation states. Evolutionary trends of meliacin chemistry thus correspond to the morphological division of the Meliaceae.
...read more
55 citations
References
More filters
TL;DR: Diploid and polyploid forms of Ambrosia dumosa Gray have been found to differ markedly in chemical constitution, and the only identifiable lactonic constituent that is found in both forms is parthenolide.
...read more
Abstract: Diploid and polyploid forms of Ambrosia dumosa Gray have been found to differ markedly in chemical constitution. From a diploid form were isolated four known lactones: coronopilin, ambrosiol, psilostachyin and parthenolide. From a polyploid form were isolated psilostachyin C and parthenolide; and two new lactones, burrodin and apoludin, the structures of which have been established. Parthenolide is the only identifiable lactonic constituent that is found in both forms.
...read more
19 citations