Chromen-2
5,7 Dimethoxy 2H chromen 2 one
... Coumarin derivatives, found in many plants, have aromatic properties, and have been widely used as a main component for fragrances (Pang & Wang, 2005). The title compound, (I), belongs to this class of molecules. It ...
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Antibacterial activity of coumarine derivatives synthesized from 4,7 dihydroxy–chromen 2 one and comparison with standard drug
... In present paper , we report the organic syntheses of four compounds from 4,7-Dihydroxy-chromen-2-one and describe the results of antibacterial activity of purified compounds. Compounds ...
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Antibacterial Activity of Coumarine Derivatives Synthesized from 4-Chloro-chromen-2-one. The Comparison with Standard Drug.
... 4-Butylamino- chromen-2-one (1a) , 4-Butylamino-2-oxo-2H-chromene-3-sulfonyl chloride (2a) , 4-Butylamino- 2-oxo-2H-chromene-3-sulfonic acid (2-hydroxy-phenyl)-amide (3a), ...
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MASS SPECTRAL STUDY ON THE FRAGMENTATION OF 3 [2 (3,5 DIMETHYL 1H PYRAZOL 1 YL)THIAZOL 4 YL] 2H CHROMEN 2 ONE BY AM1 METHOD
... www.wjpr.net Vol 7, Issue 08, 2018. 813 tubercular [11] , anti-diabetic [12] etc. Thus, the combination of thiazole, pyrazole and coumarin rings have been extensively examined in the ...
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3 [1 (2 Hydroxyanilino)ethylidene] 3H chromen 2,4 dione
... 2-aminophenol and 3-acetyl-4-hydroxycoumarin. An intra- molecular N—H O hydrogen bond generates an S(6) ring motif. In the crystal, the molecules are linked into chains extending in the [010] direction by O—H O ...
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4 Bromomethyl 6 tert butyl 2H chromen 2 one
... weak C—H O interactions link the molecules into zigzag chains extending along the c-axis direction. These chains are further assembled into (100) layers via – stacking inter- actions between inversion-related chromenone ...
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3 [2 (Triphenylphosphanylidene)acetyl] 2H chromen 2 one
... 0.524 g). The mixture was stirred for 3 hrs at room temperature. The solvent was evaporated and washed with diethyl ether, to obtain a yellow crystalline solid (96% yield, 1.14 g). In the next step ...
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3 Hydroxymethyl 6,8 dimethoxy 2H chromen 2 one
... contains four independent molecules. In the crystal structure, intermolecular O—H O hydrogen bonds link the molecules into one-dimensional infinite chains. They are arranged in a nearly parallel fashion along the b axis ...
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Crystal structure of 3 [2 (4 methylphenyl)ethynyl] 2H chromen 2 one
... Data collection: CrysAlis PRO Agilent, 2011; cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; programs used to solve structure: SIR2014 Burla et al., 2015; programs used to r[r] ...
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2 Oxo 2H chromen 4 yl 4 methylbenzoate
... supramolecular aggregation is completed by the presence of π···π stacking interactions between two parallel chromen-2- one rings; in the latter, the centroid···centroid distances, Cg1···Cg6 (x - 1, y, z) = ...
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2-oxo-2H-chromen-3-yl Propionate and 2-oxo-2H-chromen-3-yl Acetate: Short-step Synthesis, Characterization and Fluorescence Properties
... Abstract: Natural or synthetic coumarins are of great interest, since many of them show prominent biological activity and photochemical characteristics. In particular, hydroxycoumarins and their derivatives have been ...
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“Synthesis, Characterization and Antibacterial Studies of 2-Amino-5-{4-(4-amino-4-carboxy-butylamino)-3-[1-(2-hydroxy-phenylimino)-ethyl]-2-oxo-2H-chromen-7-ylamino}-pentanoic acid and its Metal (II) Complexes” by Aziz Behrami, Skender Demaku, Bahrije Dobra, Ilir Shehu, Kosova.
... ethyl]- chromen -2- one (3a), 4-[3-[1-(2- Hydroxy-phenylimino)-ethyl]-2-oxo-4-(4-oxo-butylamino)- 2H-chromen-7-ylamino]-butyraldehyde (4a) , 2-Amino-5- ...
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Crystal structure of the triethylammonium salt of 3 [(4 hydroxy 3 methoxyphenyl)(4 hydroxy 2 oxo 2H chromen 3 yl)methyl] 2 oxo 2H chromen 4 olate
... methoxy-4-hydroxyphenyl)methanediyl]bis(4-hydroxy-2H- chromen-2-one), much lower than expected cytotoxic activity was found (Rehman et al., 2013), which may be attributed to insufficient solubility. The ...
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Coumarins via knoevenagel condensation reaction (KCR) and pechmann condesation reaction
... or 2- methylresorcinol with ethyl acetoacetate, and resorcinol, 1-napthol, 2-methylresorcinol or pyrogallol with ethyl butyrylacetate, respectively in the presence of sulphuric acid as a ...
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2 (4 Hydroxyphenyl) 3 methoxy 4H chromen 4 one
... The title compound was synthesized in four steps. First, 1-(2-hydroxyphenyl)-3-{4-[(4-methoxybenzyl)oxy]phenyl}- prop-2-en-1-one (chalcone) was prepared by the condensation (with the elimination of water) ...
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DESIGN, SYNTHESIS, MOLECULAR DOCKING AND EVALUATION OF ANTIMICROBIAL ACTIVITY OF 4 AMINO N [(4 OXO 2 (PHENYLAMINO) 4H CHROMEN 3 YL) METHY LENE]BENZENESULFONAMIDE AND THEIR DERIVATIVES
... another very important group of drugs. These are used widely as antiviral 11 , antimicrobial, high ceiling diuretics 2 , antithyroid and anti- inflammatory agents 13 . The mechanism through which sulfonamides ...
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Crystal structure of 2 oxo 2H chromen 3 yl propanoate
... Quantum-chemical calculations were performed to compare with the experimental analysis. An ab-initio Hartree–Fock (HF) method was used with the standard basis set of 6-31G using the GAUSSIAN03 software package (Frisch et ...
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4 (2 Bromophenyl) 2 phenylpyrano[3,2 c]chromen 5(4H) one
... Recently He et al., 2010, synthesized various functionalized pyranochromenones and reported the crystal structure of the 2,4-diphenyl pyrano(3,2 - c)chromen-5(4H)-one (2). Structurally, both compounds 1 and ...
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2 Oxo 2 (2 oxo 2H chromen 3 yl)ethyl pyrrolidine 1 carbodithioate
... There are two independent molecules in the asymmetric unit of 2-oxo-2- (2-oxo-2H-chromen-3-yl)ethyl pyrrolidine-1- carbodithioate is shown in Fig. 1. The 2H-chromene ring systems ...
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2 Oxo 2H chromen 7 yl 4 tert butylbenzoate
... To a solution of 4-tert-butylbenzoyl chloride (6.17 mmol; 1.3 g) in dry tetrahydrofuran (30 to 40 ml), was added dry tri- methylamine (2.6 ml; 3 molar equivalents) and 7-hydroxy- coumarin (6.17 mmol; 1g) in small ...
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