ChemInform Abstract: A Benzil and an Isoflavone from Iris tenuifolia (original) (raw)

A benzil and isoflavone from Iris tenuifolia

Phytochemistry, 2008

Two compounds, tenuifodione (1) and tenuifone (2), and 12 known compounds, izalpinin (3), alpinone (4), arborinone (5), irilin B (6), irisone A (7), irisone B (8), betavulgarin (9), b-sitosterol (10), 5,7-dihydroxy-2 0 ,6-dimethoxyisoflavone (11), 2 0 ,5-dihdroxy-6,7-methylenedioxy flavanone , irisoid A (13) and ethyl-b-D-glucopyranoside were isolated from the whole plant of Iris tenuifolia Pall. All compounds, except 12, were isolated for the first time from this plant. Compounds 2, 3 and 11 have shown a considerable DPPH radical scavenging activity. Structures of these compounds were identified on the basis of spectroscopic techniques, including 2D NMR. Compounds 3, 5 and 7 were also subjected to single-crystal X-ray diffraction analysis and their structures were unambiguously deduced.

Major secondary metabolites of Iris spp

Phytochemistry Reviews, 2013

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New isoflavones from Iris kashmiriana

Journal of Asian Natural Products Research, 2008

Phytochemical investigation of the rhizomes of Iris kashmiriana (Iridaceae) led to the isolation of three isoflavones characterized by 1D and 2D NMR, IR, UV, and MS as 4 0-hydroxy-8-methoxy-6,7-methylenedioxyisoflavone (isonigricin, 1), 5,6-dihydroxy-4 0 ,7-dimethoxyisoflavone (isoirisolidone, 2), and 5,7-dihydroxy-4 0 ,6-dimethoxyisoflavone (irisolidone, 3). Compound 1 is a new isoflavone, while 2 is reported for the first time from a natural source.

Isoflavonoid Glycosides from the Rhizomes of Iris germanica

CHEMICAL & PHARMACEUTICAL BULLETIN, 2002

Plants of the genus Iris (Iridaceae) have been previously recognized as rich sources of secondary metabolites, 1-4) and comprise over 300 species. Some of these are ornamental, and among them, 16 species are found in Pakistan. 5,6) Previous phytochemical investigations of the Iris plants have resulted in the isolation of a variety of compounds including flavonoids, isoflavonoides and their glycosides, benzoquinones, triterpenoids and stilbene glycosides. 1,5,7) The compounds isolated from these species were reported to have piscicidal, antineoplastic, antioxidant, anti-tumor, antiplasmodial, and antituberculosis properties. Iris germanica L. is widely distributed in most parts of the world, and is also cultivated as an ornamental plant. Rhizomes of the plant yield an essential oil which is used in perfumes and cosmetics, while the leaves are a rich source of ascorbic acid and vitamins. 6) A number of secondary metabolites from I. germanica have been reported earlier.

Alkylated benzoquinones from Iris kumaonensis ☆

Phytochemistry, 2002

Six novel alkylated p-Benzoquinones irisoquin (A-F) (1-2, 4-7) together with a known cytotoxic quinone, irisoquin (3) along with three known isoflavones, tectoregenin, iristectorin and irigenin were isolated from the rhizomes of Iris kumaonensis and characterized. The structures of compounds 1-2, 4-7 were confirmed by extensive spectroscopic analysis, IR, MS, HRMS, GC, GC-MS, 1D (1 H, 13 C, NOE) and 2D (HMQC and HMBC) NMR and comparison with literature data of known compounds.

Isoflavones from Podocarpus amarus

Australian Journal of Chemistry, 1985

The isoflavone irisolidone is a major constituent of Podocarpus amarus heartwood. Its structure has been securely established by 13C n.m.r. studies upon a range of derivatives. The isoflavones biochanin A, genistein and daidzein are also present in the tree.

Four New Flavones and a New Isoflavone from Iris bungei

Journal of Natural Products, 2001

Four new irisflavones AD (1-4) and irilin D (5) have been isolated from the underground parts of Iris bungei along with known isoflavones, irilins A-B (6-7) and tlatancuayin (8). The structures of the new compounds were determined using NMR and mass spectroscopic methods and were found to be 2′,

New ceramides and isoflavone from the Egyptian Iris germanica L. rhizomes

Two new ceramides, irisamides A (1) and B (2), together with a new isoflavone, iridin S (3) have been isolated from the MeOH extract of the rhizomes of Iris germanica L. (Iridaceae). Their structures were established by UV, IR, HRESIMS, 1D and 2D NMR experiments, in addition to comparison with literature data. The isolated compounds were tested for their cytotoxic activity against different cancer cell lines.