New skeletal sesquiterpenoids, caprariolides A-D, from Capraria biflora and their insecticidal activity.
Four structurally novel isomeric sesquiterpenes have been isolated from the aerial parts of Capraria biflora. Caprariolides A (1), B (2), C (3), and D (4) have been determined by NMR spectroscopy experiments to be the (3S,5S,9R), (3R,5S,9R), (3R,5R,9R), and (3S,5R, 9R) isomers of 7-(furan-3'-yl)-3,9-dimethyl-1-oxaspiro[4. 5]dec-6-en-2-one, respectively. Both 1 and 2 were found to exhibit insecticidal activity against adult Cylas formicarius elegantulus, one of the most destructive insect pests of the sweet potato, Ipomoea sp.
Collins
D O
DO
Department of Chemistry, University of the West Indies, Mona, Kingston 7, Jamaica, West Indies.
Gallimore
W A
WA
Reynolds
W F
WF
Williams
L A
LA
Reese
P B
PB
D007306:Insecticides / Q000302:isolation & purification* / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008968:Molecular Conformation; D010936:Plant Extracts / Q000032:analysis; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D014900:West Indies
D007306:Insecticides; D010936:Plant Extracts; D012717:Sesquiterpenes