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Phenyl Cinnamate Derivatives from Oxalis pes‐caprae

2008; Wiley; Volume: 5; Issue: 11 Linguagem: Inglês

10.1002/cbdv.200890205

1612-1880

Marina DellaGreca, Raffaella Purcaro, Lucio Previtera, Armando Zarrelli,

Biological Control of Invasive Species

Abstract During the screening of Mediterranean invasive plants, Oxalis pes‐caprae was identified as promising species. The fresh leaves and twigs of the plant were crumbled and extracted with AcOEt. The solution was concentrated, and separated into acidic and neutral fractions. The crude neutral residue was fractionated by chromatographic procedures, followed by structure elucidation on the basis of 1 H‐ and 13 C‐NMR, and MS data analysis, and six new phenyl cinnamate derivatives were identified. The phytotoxic effects of the isolated compounds on the germination and growth of the dicotyledon Lactuca sativa L. (lettuce) were studied in the concentration range from 10 −4 to 10 −7 M .