Simple indole alkaloids and those with a nonrearrangedmonoterpenoid unit

Medicinal property, phytochemistry and pharmacology of several Jatropha species (Euphorbiaceae): a review.

This study describes the antibacterial activity of the pure isolates from Piper longum (L.) (black pepper) and Taxus baccata (L.) (Yew). Three isolates of black pepper were active against Gram-posi...

Antibacterial Activity of Isolates from Piper longum and Taxus baccata

Since the ratification of the Kyoto protocol, a significant eVort has been made worldwide to boost biofuels with the expectation of a positive contribution to renewable fuel and greenhouse gas reduction. The initial recommendations were generally not acted upon except in some particular cases, such as Brazil and Vietnam. The positive

Jatropha curcas: A Review

BACKGROUND: To reduce rates of synthetic insecticide applications, natural product alternatives and synergists are needed. A study has been made of the toxicity of ethanolic senescent leaf extracts (SLEs) of Jatropha gossypifolia and Melia azedarach on larvae of the noctuid pest Spodoptera frugiperda. Their effects as syngergists and inhibitors of several enzyme activities are also reported.

RESULTS: When added to the diet, M. azedarach SLE showed lower toxicity than J. gossypifolia SLE. However, after 2 weeks on the diet, the M. azedarach SLE proved to be lethal to 100% of the larval population. Artificial diets with both SLEs have an antifeedant effect on armyworm larvae. Acute toxicity after topical application in a dipping assay was relatively low for both J. gossypifolia and M. azedarach SLEs (LC50 of 2.6 and 1.4 g L−1, respectively, after 24 h). However, mixtures of the SLEs of M. azedarach and J. gossypifolia had a strong synergistic effect with cypermethrin. Synergism was higher with the J. gossypifolia SLE, perhaps because it contains several natural products with a methylenedioxyphenyl moiety. Both extracts inhibited P450, general esterase and acetylcholinesterase activities in vitro and in vivo.

CONCLUSION: Both J. gossypifolia and M. azedarach SLEs are antifeedants to armyworm larvae when present in the food, and also have a synergistic effect with cypermethrin in topical assays. Although the synergistic effect is less than with piperonyl butoxide, both SLEs have some inhibitor activity against detoxification enzymes and acetylcholinesterase. Thus J. gossypifolia and M. azedarach SLEs may be considered as ecofriendly approaches for the control of S. frugiperda in order to reduce cypermethrin usage. Copyright © 2012 Society of Chemical Industry

Antifeedant activity of Jatropha gossypifolia and Melia azedarach senescent leaf extracts on Spodoptera frugiperda (Lepidoptera: Noctuidae) and their potential use as synergists.

Gossypidien, a lignan from stems of Jatrophagossypifolliafn1fn1Part 29 in the series Studies onPhytochemicals. For Part 28 see Das, B., and Venkataiah,B. (1998). Biochem. Syst. Ecol., in press. iictCommunication No. 4148.

5-Methoxy-1-oxo-tetrahydro-β-carboline has been isolated from Indian Nothapodytes foetida along with camptothecin, 9-methoxycamptothecin and 20-O-acetylcamptothecin. The occurrence of the former in the plant provided an evidence of the biogenetic formation of camptothecins from indole precursors via strictosidine derivatives.

Occurrence of 5-Methoxy-1-oxo-Tetrahydro-β-Carboline in Indian Nothapodytes foetida—An Important Clue to the Biogenetic Formation of Camptothecins1

Phytochemicals. Part 29. Gossypidien, a Lignan from Stems of Jatropha gossypifollia.

Chemical investigation on a sample of the needles of Himalayan Taxus baccata has resulted in the isolation of several taxoids including taxol (1) 10-deacetyl-baccatin III (2) and 2-deacetoxytaxinine J (3) along with different lignans (6 and 7) and simple phenolics (8, 9, 10, 11 and 12). The occurrence of 4-(4'-hydroxyphenyl)-butane-2-one and 4-(4'-hydroxyphenyl)-trans-but 3-ene-2-one (8) in Taxus species is reported for the first time. The spectral data of two rearranged taxiod constituents, brevifoliol (4) and 13-decinnamoyltaxchinin B (5) are presented. The acid-catalyzed decomposition of taxol has been discussed. The synthesis of other two constituents, rhododendrol (10) and hibalactone (7) has been described.

http://www.koreascience.or.kr:80/article/JAKO199803041120664.pdf

Taxoids, Lignans, and Simple Phenolic Compounds from a Sample of the Needles of Himalayan Taxus baccata

Taxol C-13 side chain [N-benzoyl-(2R, 3S)-3-phenylisoserine] has been isolated from a collection of the needles of Himalayan Taxus baccata. This is the first report of the isolation of the compound from a natural source.

G. Anjani

Papers

Gossypidien, a lignan from stems of Jatrophagossypifolliafn1fn1Part 29 in the series Studies onPhytochemicals. For Part 28 see Das, B., and Venkataiah,B. (1998). Biochem. Syst. Ecol., in press. iictCommunication No. 4148.

Occurrence of 5-Methoxy-1-oxo-Tetrahydro-β-Carboline in Indian Nothapodytes foetida—An Important Clue to the Biogenetic Formation of Camptothecins1

Phytochemicals. Part 29. Gossypidien, a Lignan from Stems of Jatropha gossypifollia.

Taxoids, Lignans, and Simple Phenolic Compounds from a Sample of the Needles of Himalayan Taxus baccata

The First Isolation of Taxol C-13 Side Chain From Himalayan Taxus Baccata 1