Two New Alkaloids from Capparis himalayensis

Abstract

Two new alkaloids, Capparin A (1) and B (2), along with seven known compounds 6-methoxyindoline-2,3-dione (3), wogonin (4), oroxylin A (5), kaempferol (6), apigenin (7), quercetin (8) and luteolin (9), were isolated from the whole plant of Capparis himalayensis. Their structures have been established on the basis of spectral methods and the structure of 1 was confirmed by X-ray crystallographic analysis.

Synthesis, crystal structure, DNA binding properties and antioxidant activities of transition metal complexes with 3-carbaldehyde-chromone semicarbazone

“…S7a and Table S4). The metal complexes clearly show higher scavenging hydroxyl radicals activity compared with that of standard antioxidants like mannitol (IC 50 : 10.19 μM) [30]. In comparison with all the compounds, Cu(II) complex shows the higher scavenging effect than the other compounds.…”

Synthesis, Characterization and Biological Evaluation of Mononuclear Co(II), Ni(II), Cu(II) and Pd(II) Complexes with New N2O2 Schiff Base Ligands

“…Electronic Spectra The Co(II) complex exhibited well resolved bands at 1040-1090, 518-540 nm and a strong high energy band at 426-494 nm and are assigned to transitions, 4 T 2g ← 4 T 1g (F) (n 1 ), 4 A 2g ← 4 T 1g (F) (n 2 ) and 4 T 1g (P)← 4 T 1g (F) (n 3 ) for a high spin octahedral geometry.…”

“…The synthesis and application of Schiff bases and their coordination compounds have been highly considered in inorganic, organic and biological fields, since their structural properties similar to some of the biological systems. [1][2][3][4][5][6] Additionally, tetradentate Schiff bases composed of N 2 O 2 donor atoms set have been recognized as a kind of important chelating ligands for designing medicinally and catalytically useful metal complexes. [7][8][9] The flexible coordination behavior of these types of chelating ligands could also be useful to generate interesting dimeric and polymeric structures as synthones for supramolecular chemistry.…”

QSAR study of flavonoid–metal complexes scavenging O2·−

“…according to different structural characteristics, can act as metallic chelators due to their structures [1]. In the most basic sense, flavonoids chelate metal ions to form complexes that have new pharmacological activities or enhance the intrinsic pharmacological activities focusing attention on flavonoid-metal complexes, especially their synthesis and pharmacological properties [2][3][4][5][6][7][8][9][10][11][12][13][14]. Many studies about the synthesis of flavonoid-metal complexes have been reported.…”