Two isoflavonoids isolated from Dalbergia sympathetica were identified as 5,4'-dihydroxy-7-methoxyisoflavone (1) (Prunetin) and Prunetin-4'-O-beta-D-gentiobioside (2) (Dalsympathetin). The natural occurrence of Dalsympathetin is reported for the first time. The position of glycosylation in Dalsympathetin at 4'-position has been confirmed by 2D-NMR spectral studies.
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Background: Flavonoids are polyphenolic compounds found to be present in nature and abundant in flowers and fruits. Flavonoidal class phytochemicals have gained interest in the scientific field because of their important pharmacological activities. Several scientific studies have revealed anti-bacterial, anti-oxidant, anti-fungal, analgesic, anti-viral, anti-inflammatory, anti-tumor, anti-parasitic and anti-allergic activities of flavonoidal class phytochemicals.
View Article and Find Full Text PDFComments on 'Piperidone derivative from Dalbergia sympathetica'.
Magn Reson Chem
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Syngenta Crop Protection AG, CH 4002 Basel, Switzerland.
Alcoholic extraction of Dalbergia sympathetica leaves yielded N-methyl-trans-4-hydroxy-L-proline and not 3,6-dihydroxy-N-methyl-2-piperidone, as previously reported. This is shown by the identity of the 1H and 13C NMR data of the isolated compound with those of N-methyl-trans-4-hydroxy-L-proline.
View Article and Find Full Text PDFDalsympathetin--a new isoflavone gentiobioside from Dalbergia sympathetica (Dennst.).
Nat Prod Res
February 2006
Department of Chemistry, Gandhigram Rural Institute, Deemed University, Gandhigram - 624 302, Tamil Nadu, India.
Two isoflavonoids isolated from Dalbergia sympathetica were identified as 5,4'-dihydroxy-7-methoxyisoflavone (1) (Prunetin) and Prunetin-4'-O-beta-D-gentiobioside (2) (Dalsympathetin). The natural occurrence of Dalsympathetin is reported for the first time. The position of glycosylation in Dalsympathetin at 4'-position has been confirmed by 2D-NMR spectral studies.
View Article and Find Full Text PDFPiperidone derivative from Dalbergia sympathetica.
Magn Reson Chem
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Department of Chemistry, Gandhigram Rural Institute, Deemed University, Gandhigram-624 302, Tamil Nadu, India.
An alcoholic extract of Dalbergia sympathetica, on column chromatography, yielded a compound which analyzed for C(6)H(11)NO(3) (M(+) 145). The IR spectrum of the compound showed the presence of carbonyl and hydroxyl groups. PMR, (13)C and DEPT NMR spectral studies of the compound showed the presence of one N-methyl, two methine and two methylene groups.
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