[PDF] Top 20 Crystal structure of 2 methylamino 4 (6 methyl 4 oxo 4H chromen 3 yl) 3 nitropyrano[3,2 c]chromen 5(4H) one with an unknown solvate
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Crystal structure of 2 methylamino 4 (6 methyl 4 oxo 4H chromen 3 yl) 3 nitropyrano[3,2 c]chromen 5(4H) one with an unknown solvate
... the crystal structure of a very similar compound, the 6-chloro-4-oxo-4H-chromen-3-yl derivative, see: Raja et ... See full document
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4 (4 Bromophenyl) 2 methylamino 3 nitro 5,6,7,8 tetrahydro 4H chromen 5 one
... molecular structure is stabilized by an intramolecular N—H O hydrogen bond, which generates an S(6) ring ...the crystal, molecules are linked via C— H O hydrogen bonds, which generate ... See full document
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Methyl 2 amino 4 (4 nitrophenyl) 5 oxo 5,6 dihydro 4H pyrano[3,2 c]quinoline 3 carboxylate dimethylformamide solvate
... The synthesis of pyranoquinolines and their derivatives is of great interest in organic chemistry, because some of these compounds possess antibacterial activity (Madkour et al., 2001) and moderate acetylcholine esterase ... See full document
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4 (4 Bromophenyl) 7,7 dimethyl 2 methylamino 3 nitro 7,8 dihydro 4H chromen 5(6H) one including an unknown solvate
... the methyl C atoms lying 0.027 (4) and 1.929 (4) A ˚ from the mean plane of the chromene ...dimethyl-substituted C atom as the flap. The methylamine and nitro groups are slightly ... See full document
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Ethyl 2 amino 4 (4 methyl 1,3 thiazol 5 yl) 5 oxo 4H,5H pyrano[3,2 c]chromene 3 carboxylate
... solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare ... See full document
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Crystal structure of 2 methylamino 3 nitro 4 p tolylpyrano[3,2 c]chromen 5(4H) one
... Geometry . All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of ... See full document
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(4S*) 2 Methylamino 3 nitro 4 (4 nitrophenyl) 5,6,7,8 tetrahydro 4H chromen 5 one
... solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et ... See full document
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rac 4 (4 Chlorophenyl) 2 methylamino 3 nitro 5,6,7,8 tetrahydro 4H chromen 5 one
... and crystallizes as a racemate. The methylene group -positioned to the carbonyl group is partially (21%) disordered. It flips to the opposite sides of the corresponding six-membered carbocycle by 0.304 (3) and ... See full document
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Crystal structure of 4 (4 methoxyphenyl) 7,7 dimethyl 2 methylamino 3 nitro 7,8 dihydro 4H chromen 5(6H) one
... carbocyclic ring of the chromene moiety adopts an envelope conformation with the dimethyl-substituted C atom as the flap. The pyran ring has a flat-boat conformation. The methoxy- phenyl ring is orthogonal to the ... See full document
9
Crystal structure of 4 (6 bromo 4 oxo 4H chromen 3 yl) 2 methylamino 3 nitropyrano[3,2 c]chromen 5(4H) one chloroform monosolvate
... to one another with a dihedral angle of 88.20 (2)° between their mean ...The nitro group is bonded to the pyran ring at CC with the torsion angle C12—C11—N1—O5 0f ...related structure (Raja et ... See full document
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Crystal structure of (2E) N methyl 2 [(4 oxo 4H chromen 3 yl)methylidene]hydrazinecarbothioamide
... India, c Department of Chemistry, National Institute of Technology, Trichy 620 015, India, and d Deparment of Chemistry, National Institute of Technology, Trichy 620 015, ... See full document
7
Crystal structure of 4 (6 chloro 4 oxo 4H chromen 3 yl) 2 methylamino 3 nitro 4H,5H pyrano[3,2 c]chromen 5 one chloroform monosolvate
... C16 0.0344 (14) 0.0395 (14) 0.0299 (13) −0.0102 (11) 0.0023 (11) −0.0017 (11) C17 0.0350 (14) 0.0467 (16) 0.0361 (15) −0.0128 (12) 0.0056 (12) −0.0031 (12) C18 0.0346 (15) 0.0508 (17) 0.0432 (16) −0.0115 (13) −0.0014 ... See full document
11
2 (4 Hydroxyphenyl) 3 methoxy 4H chromen 4 one
... For general features of flavones and flavonols (derivatives of 3-hydroxy-2-phenyl-4H-chromen-4-one), see: Demchenko (2009); Ma et al. (2012). For related structures, see: Wera et ... See full document
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6 Ethyl N methyl 3 nitro 4 nitromethyl 4H chromen 2 amine
... For the biological and pharmacological importance of 4H- chromene derivatives, see: Cai (2007, 2008); Cai et al. (2006); Gabor (1988); Brooks (1998); Hyana & Saimoto (1987); Tang et al. (2007). For related ... See full document
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Crystal structure of 2 (2,3 dimethoxynaphthalen 1 yl) 3 hydroxy 6 methoxy 4H chromen 4 one
... and the 4H-chromenon skeleton is 88.96 (3)°, which shows they are almost orthogonal each other. In our previous report on flavonol (Yoo et al., 2014), the angle between 4H-chromenon and benzene ring ... 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
... Hydrophobic molecules are not only ineffective inside biological fluids but they may also accumulate inside an organism. Increasing the solubility by increasing the hydro- philicity of potentially bioactive molecules may ... See full document
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Ethyl (E) 3 (6 methyl 4 oxo 4H chromen 3 yl)prop 2 enoate
... Geometry . All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of ... See full document
7
3 (3 Nitrobenzyl) 4H chromen 4 one
... Geometry . All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of ... See full document
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N,6 Dimethyl 4 (methylsulfanyl) 3 nitro 4H chromen 2 amine
... C5 0.0361 (6) 0.0465 (7) 0.0386 (6) −0.0025 (5) 0.0082 (5) 0.0013 (5) C6 0.0409 (7) 0.0552 (8) 0.0474 (7) −0.0120 (6) 0.0090 (6) −0.0001 (6) C7 0.0352 (7) 0.0667 ... See full document
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(E) 4 Methoxy N′ [(6 methyl 4 oxo 4H chromen 3 yl)methylidene]benzohydrazide monohydrate
... The 4H-chromen-4-one segment segment is slightly twisted with a dihedral angle between the two 6-membered rings of 3.30 (5)°. The dihedral angles between the pyranone ring and ... See full document
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