Results 121 to 130 of about 1,260 (160)

Rotenoid synthesis via radical cyclisation

Journal of the Chemical Society, Chemical Communications, 1988
The (±)-6aα, 12aα, 12α-chromanochromanol acetate (11; R = Ac), representing the core structure of the insecticidal rotenoid alcohol (2), has been synthesised in six steps from the chromone (4); the cis,cis-stereochemistry is obtained in an intramolecular 6-exo aryl radical addition.
S. Asiah Ahmad-Junan, Donald A. Whiting
openaire   +1 more source

12-nor-Rotenoids and other cytotoxic constituents of Pachyrhizus erosus seeds.

Phytochemistry
Five previously undescribed compounds, including three 12-nor-rotenoids, were isolated from Pachyrhizus erosus seeds. A brief survey on the dealkylation of selected rotenoids with BBr3 was undertaken.
Suriphon Singha, J. Yahuafai, S. Sutthivaiyakit   +2 more
semanticscholar   +1 more source

Insecticidal Active Rotenoids from Plant Parts and Callus Culture of Medicago sativa L. from a Semiarid Region of India (Rajasthan)

, 2020
Vector-borne diseases are quite prevalent globally and are one of the major causes of deaths due to infectious diseases. There is an availability of synthetic insecticides, however, their excessive and indiscriminate use have resulted in the emergence
S. Vats, Preeti Mehra
semanticscholar   +1 more source

Dimethylchromene rotenoids from Tephrosia candida

Phytochemistry, 1997
Abstract The hexane and ethyl acetate extracts of roots of Tephrosia candida afforded a new rotenoid, 12a-hydroxy-β-toxicarol, together with a series of known ones, identified as: deguelin, α-toxicarol, tephrosin, 6a,12a-dehydrodeguelin, 12a-hydroxy-α-toxicarol, 6a,12a-dehydro-α-toxicarol and 6a,12a-dehydro-β-toxicarol.
Cesar C. Andrei, Paulo C. Vieira, João B. Fernandes, M.Fátima das G.F. da Silva, Edson Rodrigues^Fo   +4 more
openaire   +1 more source

Rotenoids from Amorpha canescens roots

Phytochemistry, 1975
Abstract A new rotenoid termed amorpholone has been isolated from a hexane extract of Amorpha canescens roots and identified as 6-hydroxydehydrorotenone by spectroscopic methods. Its structure was conformed by its conversion to rotenonone and by synthesis from rotenone. Also isolated were rotenonone and acetylursolic acid.
David M. Piatak, Gary A. Flynn, Paul D. Sorensen   +2 more
openaire   +1 more source

Rotenoids and Isoflavones fromSarcolobus globosus

Planta Medica, 2005
Sarcolobus globosus is a medicinal plant growing in mangrove forests in Asia. No constituents from this plant have been reported previously. From the diethyl ether extract of S. globosus a new rotenoid sarcolobin and a new isoflavone sarcolobone, as well as the previously known rotenoids tephrosin, 12aalpha-hydroxydeguelin, 11-hydroxytephrosin, 12a ...
Helle, Wangensteen, Mahiuddin, Alamgir, Sultana, Rajia, Anne Berit, Samuelsen, Karl Egil, Malterud   +4 more
openaire   +2 more sources

Antiinflammatory activity of rotenoids from Clitoria fairchildiana

Phytotherapy Research, 2002
Five structurally related rotenoids were isolated from the roots of Clitoria fairchildiana. The antiinflammatory activity was investigated using a capillary permeability assay. The protective effect was measured as the inhibition in vascular permeability produced by acetic acid in the peritoneal cavity. The results suggest that for maximum activity the
Bernadete, Pereira da Silva, José, Paz Parente   +1 more
openaire   +2 more sources

A New Rotenoid from Derris malaccensis

HETEROCYCLES, 2008
A new rotenoid named 6-oxo-dehydroelliptone (2) was isolated from the roots of Derris malaccensis Prain, along with six known compounds. The isolation of dehydroelliptone (1) from a natural source and its unequivocal 1 H and 13 C NMR assignments were reported for the first time.
Kittisak Likhitwitayawuid, Ruchira Wangteeraprasert   +1 more
openaire   +1 more source

Reactions of rotenoids with hydroxylamine

Liebigs Annalen der Chemie, 1988
AbstractReaction of rotenone (1a) and amorphigenin (2a) with hydroxylamine in alkaline medium affords a mixture of the isoximes 5 and 6, and the new 6a‐NH2 spiro derivatives 12a, b and 13a, b. The structures, stereochemistry, and the mechanisms of formation of these products are discussed.
openaire   +1 more source

Rotenoids from roots of Millettia pachycarpa

Phytochemistry, 1982
Abstract Roots of Millettia pachycarpa furnished retenone, cis -12a-hydroxyrotenone, rot-2′-enonic acid and cis -12a-hydroxyrot-2′-enonic acid.
Ashok Kumar Singhal, Ram Prakash Sharma, Jogendra Nath Baruah, Serengolam V. Govindan, Werner Herz   +4 more
openaire   +1 more source