Phytotoxic and antimicrobial constituents of Argyreia speciosa and Oenothera biennis

Shukla, Y. N.; Srivastava, A. K.; Kumar, Sunil; Kumar, Sushil

doi:10.1016/s0378-8741(99)00017-3

Cited by 82 publications

(52 citation statements)

References 4 publications

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“…It can scavenge peroxyl radicals [2] and has antifungal activity [3], as well. But investigations of its coordination chemistry are relatively rare.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of cesium 3,4,5-trihydroxybenzoate dihydrate, Cs[C7H5O5] · 2H2O

Hu¹,

Wang²,

Jiang³

et al. 2007

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialTo the solution of 10 mmol gallic acid in 200 ml bidistilled water, solution of equimolar amount of cesium hydroxide was added dropwise. After reflux for 10 h with continuous stirring, the resulting solution was evaporated to about 20 ml in vacuum and filtered hot. The filtrate was then set aside for crystallization at room temperature. Brown crystals of the title compound suitable for Xray structure determination were isolated a month later. Experimental detailsThe H atoms associated with the aromatic C atoms were placed in idealized positions and included in the refinement in the riding model approximation with U iso fixed at 1.5Ueq(C) (d(CH) = 0.93 Å). H atoms associated with O atoms were located in Fourier difference maps and refined with OH bond lengths restrained to 0.82(1) Å and fixed U iso values. DiscussionGallic acid (3,4,5-trihydroxybenzoic acid; GA) is a natural plant phenol with well-known antioxidant properties [1], which occurs in many medicinal plants and presents mostly in a conjugated form. It can scavenge peroxyl radicals [2] and has antifungal activity [3], as well. But investigations of its coordination chemistry are relatively rare. Only the structure of a nickel complex has been reported [4], in which GA was used as a reagent, but has no direct interactions with the central cation. The asymmetric unit of the title crystal structure consists of one Cs atom, one gallic acid anion and crystal water molecules (figure, top). The occupancies of O6 and O8 are both 0.5 according to the symmetry constraints, thus the asymmetric unit contains two water molecules. The water molecule O8 has no interactions with the cesium cation. O3, O5, O6, O7 are on dibridging positions (figure, bottom), among which O3, O5 and O7 form Cs 2O2 rings with their symmetry-related water molecules and two cesium cations bridged. Two carboxylate oxygen atoms (O1/O2) and a phenolic oxygen atom were involved in coordination leading to a coordination number of ten for the cation. The CsO distances cover a wide range from 3.051(4) Å to 3.748(4) Å, which seem to be normal comparing to those previously found in cesium 2,4-dinitrophenoxide monohydrate, 3.120(4) Å to 3.805(5) Å [5]. The CsOCs angles are 120.1(1)°, 129.58(8)°and 114.42(8)°for O3, O5 and O7, respectively. The crystal structure is assembled into a rather complicated three-dimensional network owing to the m 2 -O atoms and the bridging function of the ligand GA.Z. Kristallogr.

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“…It can scavenge peroxyl radicals [2] and has antifungal activity [3], as well. But investigations of its coordination chemistry are relatively rare.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of cesium 3,4,5-trihydroxybenzoate dihydrate, Cs[C7H5O5] · 2H2O

Hu¹,

Wang²,

Jiang³

et al. 2007

Zeitschrift Für Kristallographie - New Crystal Structures

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“…Pharmacological properties of coumarin aroused our interest to explore new analogs of coumarin for antimicrobial activity. Coumarin and its analogues are widely distributed in plants and they are responsible for wide variety of the activities especially antibacterial and antifungal [1][2][3][4][5][6][7][8][9][10]. The in vitro antimicrobial activity of phenothiazine was first described by Paul Ehlich early in the twentieth century [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and antimicrobial activity of novel oxime derivatives of phenothiazine

Barve

Noolvi²,

Subhedar

et al. 2011

Eur. J. Chem.

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“…Antimicrobial activity and chemical constituents from O. biennis roots have been reported. [11][12][13] This paper deals with the isolation and structure elucidation of two new compounds, oenotheralanosterol A (1), oenotheralanosterol B (2) on the basis of 1 H and 13 C NMR, DEPT spectroscopic studies, including 2D-NMR, COSY, HETCOR, HSQC, and chemical reactions from the roots. This is the first report of the isolated compounds (1-2) along with four known compounds β-sitosterol oleanolic acid, gallic acid, β-sitosterol-β-D-glucoside from the roots of O. biennis.…”

Section: Introductionmentioning

confidence: 99%

New Oenotheralanosterol A and B Constituents from the Oenothera biennis Roots

2010

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Phytotoxic and antimicrobial constituents of Argyreia speciosa and Oenothera biennis

Cited by 82 publications

References 4 publications

Crystal structure of cesium 3,4,5-trihydroxybenzoate dihydrate, Cs[C7H5O5] · 2H2O

Crystal structure of cesium 3,4,5-trihydroxybenzoate dihydrate, Cs[C7H5O5] · 2H2O

Synthesis and antimicrobial activity of novel oxime derivatives of phenothiazine

New Oenotheralanosterol A and B Constituents from the Oenothera biennis Roots

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