Arnebia densifloradan naftakinonların izolasyonu ve yapı tayini
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Abstract
Ill ÖZET Bu çalışmada, Sivas-Kangal yöresinden toplanan Arnebia densiflora köklerinin n- hekzan ekstresinden kromatografik yöntemlerle izole edilen üç naftakinon türevinin yapısı aydınlatılmıştır. Bunlar terakrilalkannin, a-metil-«butilalkannin+izovalerilalkannin karışımı ve P,P-dirrıetilakrilalkannindir. Aynca İTK-Densitometrik yöntemle Sivas-Kangal ve Eskişehir-Sivrihisar materyallerinde oda ve azot atmosferinde hazırlanan ekstrelerde terakrilalkannin ve a-metil-n- butüalkannin+izovalerilalkannin'in miktar tayinleri gerçekleştirilmiştir. Anahtar kelimeler: Arnebia densiflora, Terakrilalkannin, P,P-dimetilakrilalkannin, a-metil-«-butilalkannin, izovalerilalkannin, UV, İR, NMR, Kütle Spektroskopisi, iTK-Densitometri. IV SUMMARY In this study, Arnebia densiflora roots collected from Sivas-Kangal and Eskişehir- Sivrihisar regions were extracted with n-hexane. Three naphthaquinone derivatives, teracrylalkannin, a mixture of oc-methyl-w-butylalkannin and izovalerylalkannin, and P,P-dimethylacrylalkannin, were isolated by chromatographic methods from the extract and identified by spectroscopic methods. In addition, The quantities of teracrylalkannin and the mixture of a-methyl-n- butylalkannin and izovalerylalkannin were determinated in extract by TLC-Densitometric methods. Key words : Arnebia densiflora, Teracrylalkannin, a-Methyl-n-butylalkannin, Isovalerylalkannin, UV, IR, NMR, Mass spectrometry, TLC -Densitometry.
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