Prenylflavonoids from Flourensia fiebrigii

• Published in: Phytochemistry (Oxford) Vol. 68; no. 9; pp. 1295 - 1299
• Main Authors: Uriburu, María L., Gil, Roberto R., Sosa, Virginia E., de la Fuente, Juana R.
• Format: Journal Article
• Language: English
• Published: OXFORD Elsevier Ltd 01.05.2007; Elsevier
• Subjects: 5-Deoxyflavonoids; Asteraceae; Asteraceae - chemistry; Biochemistry & Molecular Biology; Biological and medical sciences; chemical analysis; Chemical constitution; flavonoids; Flavonoids - chemistry; Flavonoids - isolation & purification; Flourensia; Flourensia fiebrigii; Fundamental and applied biological sciences. Psychology; Life Sciences & Biomedicine; methoxyflavanone; Molecular Structure; Plant Components, Aerial - chemistry; Plant physiology and development; Plant Sciences; Prenylated flavonoids; prenylflavonoids; Science & Technology; spectral analysis; trihydroxyflavanone; Argentina; Flourensia fiebrigii; Prenylated flavonoids; 5-Deoxyflavonoids; Asteraceae; FLAVANONE; prenylated flavonoids; 5-deoxyflavonoids; FLAVONOIDS; PLATYLEPIS; CONSTITUENTS; Molecular structure; Compositae; Flavonoid; Flavanone derivatives; Dicotyledones; Angiospermae; Isolation; Above ground plant part; Spermatophyta
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/j.phytochem.2007.01.004

Three flavonoids were isolated from Flourensia fiebrigii, amongst them the 5-deoxyprenylflavonoids ( 1, 2) and 4″-hydroxyprenylflavonoids ( 2, 3), together with known compounds previously determined in the genus. Their structures were established with the aid of spectroscopic analyses. Three compounds: (2 S)-8-(3″-methylbut-2″-enyl)-7,3′,4′-trihydroxyflavanone, (2 S)-8-(3″-methyl-4″-hydroxy-but-2″-enyl)-7,3′,4′-trihydroxyflavanone and (2 S)-8-(3″-methyl-4″-hydroxy-but-2″-enyl)-5,3′,4′-trihydroxy-7-methoxyflavanone, along with five previously known compounds, were isolated from the aerial parts of Flourensia fiebrigii. Their structures were elucidated by application of various spectroscopic methods, including 1D and 2D NMR techniques.