Chemical study of indian yam beans (Pachyrrhizus erosus)

Krishnamurti, M.; Sambhy, Y.R.; Seshadri, T. R.

doi:10.1016/s0040-4020(01)92883-2

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…12a-Hydroxydolineone [6] is reported now for the first time from N. mitis, while complete and detailed -nmr (360 MHz) and I3C-nmr data are given. Our more detailed 'H-nmr values corresponded with those reported earlier (19,22). (CDCl,)…”

Section: (S)supporting

confidence: 89%

“…The petroleum ether total extract of N. mitis roots showed significant acaricidal properties that were attributed to the presence of 12a-hydroxyrotenone [7].Neorautanenia species are a widespread group of Fabaceae (Papilionaceae) plants of Central and South Africa and are known for their poisonous properties (1). These plants are used by the native population as fish poison (2-5) and insecticide (6,7), while in the traditional medicine of Central Africa they are used against syphilis (8) and the treatment of female frigidity.4 The possible use of some of these plants for killing bilharziacarrying fresh water snails of the genera Bulinus and Biophalaria has also been reported (9).Several chemical studies have been performed already on Neorautanenia species, among others N. ficifolia (3,14,15), N. edulis (2,4,12,16,18), N. pseudopachyrrhiza (10,11,13), N. amboensis (5,12,17,19), and the related Pachyrrhizus erosus (20)(21)(22). In the course of our investigation on medicinal plants from Rwanda (Central Africa) we investigated Neorautanenia mitis (A.…”

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confidence: 99%

“…Several chemical studies have been performed already on Neorautanenia species, among others N. ficifolia (3,14,15), N. edulis (2,4,12,16,18), N. pseudopachyrrhiza (10,11,13), N. amboensis (5,12,17,19), and the related Pachyrrhizus erosus (20)(21)(22). In the course of our investigation on medicinal plants from Rwanda (Central Africa) we investigated Neorautanenia mitis (A.…”

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Isolation and Structural Elucidation of Potentially Insecticidal and Acaricidal Isoflavone-Type Compounds from Neorautanenia mitis

Vanpuyvelde¹,

Dekimpe²,

Mudaheranwa³

et al. 1987

J. Nat. Prod.

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Investigation of the roots of Neorautanenia mitis, collected in Rwanda (Central Africa), revealed the presence of three compounds, neotenone [1], dolineone [3], and pachyrrhizine [2], which were previously isolated from Neorautanenia pseudopachyrrhiza, the former name of the title plant. However, neotenone [1], which was previously reported as an optically inactive substance, was isolated now in optically active form for the first time. In addition, four isoflavanone-type compounds were isolated for the first time from N. mitis, including dehydroneotenone [51, neoduline [4], 12a-hydroxydolineone [6], and 12a-hydroxyrotenone [7]. Detailed 360 MHz nmr spectra of all compounds are reported for the first time, providing correction to previously incorrectly reported low resolution data. Also, the 13C-nmr and mass spectral data of all these compounds are reported for the first time. The petroleum ether total extract of N. mitis roots showed significant acaricidal properties that were attributed to the presence of 12a-hydroxyrotenone [7].Neorautanenia species are a widespread group of Fabaceae (Papilionaceae) plants of Central and South Africa and are known for their poisonous properties (1). These plants are used by the native population as fish poison (2-5) and insecticide (6,7), while in the traditional medicine of Central Africa they are used against syphilis (8) and the treatment of female frigidity.4 The possible use of some of these plants for killing bilharziacarrying fresh water snails of the genera Bulinus and Biophalaria has also been reported (9).Several chemical studies have been performed already on Neorautanenia species, among others N. ficifolia (3,14,15), N. edulis (2,4,12,16,18), N. pseudopachyrrhiza (10,11,13), N. amboensis (5,12,17,19), and the related Pachyrrhizus erosus (20)(21)(22). In the course of our investigation on medicinal plants from Rwanda (Central Africa) we investigated Neorautanenia mitis (A. Rich.) Verdcourt (local name "Igitembatenibe" or "Amakubwe") on its insecticidal and acaricidal properties because of some promising

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confidence: 89%

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Isolation and Structural Elucidation of Potentially Insecticidal and Acaricidal Isoflavone-Type Compounds from Neorautanenia mitis

Vanpuyvelde¹,

Dekimpe²,

Mudaheranwa³

et al. 1987

J. Nat. Prod.

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“…Fusion of naturally occurring benzopyrans with a base has given products which are the result of rearrangements and/or cleavage of side-chain m~ieties.~','~ Birch and co-workersIs1 showed that 2,2-dirnethyl-2H-l-benzopyran (91) was cleaved to 2-(3-methyl-2-butenyI)phenol (276) by the use of lithium in ammonia. Cleavage of 5,7-dimethoxy-2,2-diethyl-2H-l-benzopyran ( hydroxide.182 However, when 5-or 7-hydroxy groups are attached to the aromatic moiety, such as in evodionol (47), acetone is p r o d~c e d .~~~'~~~ Sometimes acetaldehyde is also found and thus the reaction mechanism has been postulated'2,'82,183 to involve (277) to (280).…”

Section: Base Cleavage and Rearrangementmentioning

confidence: 99%

2 H ‐ and 4 H ‐1‐Benzopyrans

Schweizer

Meeder‐Nycz

1977

Chemistry of Heterocyclic Compounds: A Series of Monographs

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“…The toxic principle of the seeds was considered to be a saponin by Nag, Banerjee & Pain (1935). Subsequently Krishnamurti, Sambhy & Seshadri (1970) showed that the toxicity is comparable to that of the rotenone bearing roots of Derris and Lonchocarpus. From the seeds we have isolated and purified two proteins with molecular mass of 33 and 26 kDa, respectively, which may be members of an RIP's class based on the similar molecular mass of type I RIP's.…”

Section: Introductionmentioning

confidence: 99%