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Isolation and Phytotoxicity of Apocarotenoids from Chenopodium a lbum

2004; American Chemical Society; Volume: 67; Issue: 9 Linguagem: Inglês

10.1021/np049857q

1520-6025

Marina DellaGreca, Cinzia Di Marino, Armando Zarrelli, Brigida D’Abrosca,

Natural product bioactivities and synthesis

Two new compounds (1, 2) and 16 apocarotenoids (3−18) were isolated from the weed Chenopodium album. The structures of new apocarotenoids were determined to be (3R,6R,7E,9E,11E)-3-hydroxy-13-apo-α-caroten-13-one (1) and (6S,7E,9E,11E)-3-oxo-13-apo-α-caroten-13-one (2) by spectroscopic, NMR, and MS analysis. Five of the known compounds (5, 6, 13, 15, and 17) were previously reported only as synthetic compounds. Effects of these compounds on germination and growth of Lactuca sativa (lettuce) were studied in the 10-4−10-7 M concentration range.