[PDF] Top 20 5,7 Dimethoxy 2H chromen 2 one
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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 ... See full document
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Crystal structure of 3 [2 (thiophen 3 yl)ethynyl] 2H chromen 2 one
... S1 0.0356 (4) 0.0357 (4) 0.0303 (4) −0.0118 (2) 0.0144 (3) 0.0005 (2) O1 0.0231 (7) 0.0234 (7) 0.0148 (6) −0.0009 (5) 0.0109 (5) 0.0002 (5) O2 0.0262 (7) 0.0299 (8) ... See full document
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4 Methyl 7 [3 (4 o tolylpiperazin 1 yl)propoxy] 2H chromen 2 one
... The crystal packing of (I) shows an intermolecular – interaction and a C—H O hydrogen bond. Ring B stacks with a symmetry-equivalent ring at (2 x, 1 y, z), with an interplanar distance of 3.48 (2) A ˚ and ... See full document
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7 Diethylamino 3 {(E) 4 [(E) 2 (pyridin 4 yl)ethenyl]styryl} 2H chromen 2 one
... [1.392 (3) Å]. The coumarin ring, phenyl ring, and pyridine ring were connected by the two C—C double bonds (C6—C7 bond and C14—C15 bond), which make the three rings in good conjugation. In addition, the dihedral angles ... See full document
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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
... structure one is flipped so that the lactone and alcohol moieties face each other, whereas in the present case alcohol faces alcohol and lactone faces lactone), (ii) a contraction ... See full document
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Design, synthesis and biological evaluation of 3-(2-aminooxazol-5-yl)-2H-chromen-2-one derivatives
... Tube dilution method [31] was used for evaluating the antimicrobial potential of the compounds and the standard drugs used were cefadroxil (antibacterial) and fluconazole (antifungal). The microbial species used in the ... See full document
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7 Diethylamino 3 [(2Z) 3 (6 methoxy 2 naphthyl)prop 2 enoyl] 2H chromen 2 one
... Compounds incorporating benzopyrone structural units possess a wide range of biological activities (Pawar & Mulwad, 2004). Coumarins are an important class of molecules because of their applications in synthetic ... See full document
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Crystal structure of 2 oxo 2H chromen 7 yl 4 fluorobenzoate
... tuents at the 7 position (Ramasubbu et al., 1982; Gnanaguru et al., 1985; Parveen et al., 2011; Ji et al., 2014, 2017). In these structures and those of meta-substituted coumarin esters (Abou et al., 2013; Bibila ... See full document
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Ethyl 2 [(2 oxo 2H chromen 7 yl)oxy]acetate
... To a stirred solution of 7-hydroxycoumarin (500 mg, 3 mmol) in dry acetone, potassium carbonate (900 mg, 6 mmol) was added. After stirring for five minutes, ethyl chloroacetate (564 mg, 4.6 mmol) and a catalytic ... See full document
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3 Hydroxymethyl 6,8 dimethoxy 2H chromen 2 one
... A strain of fungus (No. 2090) was deposited in the Department of Applied Chemistry, Zhongshan University, Guangzhou, People's Republic of China. Culture conditions: GYT medium (glucose 10 g /L, peptone 2 g /L, ... See full document
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Crystal structure of 7 hydroxy 8 [(4 methylpiperazin 1 yl)methyl] 2H chromen 2 one
... Coumarin (2H-chromen-2-one) derivatives have wide appli- cations in diverse areas such as pharmaceuticals (Neyts et al., 2009), dyes (Hara et al., 2003) and liquid crystal (Schadt et al., ... See full document
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The crystal structures of two new coumarin derivatives: 2 (4 {2 [(2 oxo 2H chromen 4 yl)oxy]acetyl}piperazin 1 yl)acetamide and N (2,4 dimethoxybenzyl) 2 [(2 oxo 2H chromen 4 yl)oxy]acetamide
... Compound (II) N,N-Diisopropylethylamine (DIPEA; 1.82 g, 3.1 equiv.) was added to a mixture of 2-(2-oxo-2H- chromen-4-yloxy)acetic acid (1.0 g, 1.0 equiv.), 1-ethyl-3-(3- ... See full document
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Potassium (4 methyl 2 oxo 2H chromen 7 yloxy)sulfate
... chains with K K D,E distances of 4.648 (2) A ˚ (for symmetry codes see Fig. 4 caption). Additionally, sulfate atom O7 coordinates to a potassium cation from an adjacent chain, and atom O8 acts as the bridging atom ... See full document
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Crystal structure of 3 [2 (4 methylphenyl)ethynyl] 2H chromen 2 one
... O1 0.0288 (4) 0.0177 (4) 0.0170 (4) 0.0023 (3) 0.0054 (3) 0.0017 (3) O2 0.0459 (6) 0.0265 (5) 0.0239 (4) 0.0070 (4) 0.0132 (4) 0.0074 (3) C1 0.0237 (6) 0.0236 (6) 0.0164 (5) 0.0020 (4) 0.0046 (4) 0.0019 (4) ... See full document
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4 (4 Fluorophenyl) 2 methyl 3 (1 oxy 4 pyridyl)isoxazol 5(2H) one
... of 2-(4-fluorophenyl)-3-oxo-3-pyridin-4-yl-N-oxide-propionic acid ethyl ester (see ...Na 2 SO 4 and concentrated under vacuum, affording an oil that was chromatographed ... See full document
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6 Bromo 3 {2 [2 (diphenylmethylene)hydrazinyl] 1,3 thiazol 5 yl} 2H chromen 2 one chloroform monosolvate
... of one 6-bromo-3-(2-(2-(diphenylmethyl- ene)hydrazinyl)thiazol-5-yl)-2H- chromen-2-one molecule and one chloroform solvent ... See full document
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3 [2 (Triphenylphosphanylidene)acetyl] 2H chromen 2 one
... O2 0.0203 (5) 0.0268 (6) 0.0200 (5) 0.0101 (4) 0.0074 (4) 0.0050 (4) O3 0.0249 (5) 0.0174 (5) 0.0173 (5) 0.0062 (4) 0.0046 (4) 0.0023 (4) C1 0.0199 (7) 0.0190 (7) 0.0177 ... See full document
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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
... A mixture of 3-(2-bromoacetyl)coumarin (1.33 g, 0.005 mol) and thiosemicarbazide (0.45 g, 0.005 mol) was taken in 10 ml of acetylacetone and stirred for 5 minutes at room temperature. The solid separated ... See full document
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Coumarins via knoevenagel condensation reaction (KCR) and pechmann condesation reaction
... and 7-(diethylamino)-3- (1-oxobutyl)coumarin were synthesized by KCR method which involved the condensation of salicylaldehyde or 4-(diethylamino)salicylaldehyde with ethyl acetoacetate, 4-(diethylamino)- ... See full document
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Crystal structure of 4 methyl 7 propoxy 2H chromen 2 one
... molecules, A and B, that are interconnected through an offset – interaction [inter-centroid separation = 3.6087 (4) A ˚ ]. The fused benzene and pyran-2-one rings in each molecule are essentially coplanar, ... See full document
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