[PDF] Top 20 Crystal structure of 3 acetyl 4H chromen 4 one
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Crystal structure of 3 acetyl 4H chromen 4 one
... O1 0.0172 (5) 0.0250 (6) 0.0351 (6) −0.0015 (4) 0.0041 (5) 0.0048 (5) O2 0.0169 (6) 0.0302 (6) 0.0419 (7) −0.0011 (5) 0.0043 (5) 0.0109 (5) O3 0.0269 (6) 0.0319 (7) 0.0468 (8) 0.0004 (5) 0.0032 (6) 0.0164 (6) C1 ... See full document
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Crystal structure of (2E) N methyl 2 [(4 oxo 4H chromen 3 yl)methylidene]hydrazinecarbothioamide
... 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
7
Crystal structure of (4E) 4 (8 methoxy 2H chromen 2 ylidene) 3 methyl 1 phenyl 1H pyrazol 5(4H) one
... In (I), the benzene ring A (C1–C6) and the (4E)-4-(8-methoxy-2H-chromen-2-ylidene)-5-methyl-2,4-dihydro-3H- pyrazol-3-one (C7 –C20/N1/N2/O1/O2/O3) part of the molecule are planar with r. m. s. ... See full document
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ANTIMICROBIAL ACTIVITIES; IONIC LIQUID AND MICROWAVEASSISTED SYNTHESIS OF RING SUBSTITUTED 3 (3 BROMO 4 OXO 4H CHROMEN 2 YL) 4H CHROMEN 4 ONE
... flavonoidic structure exhibit important biological properties such as antiviral, cardioprotective, antioxidant, hepatoprotective, antitumoral and antiflammatory ...The 3-Formylchromone derivatives have been ... 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
... methoxy-4-hydroxyphenyl)methanediyl]bis(4-hydroxy-2H- chromen-2-one), much lower than expected cytotoxic activity was found (Rehman et ... See full document
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2 (Dibromomethyl) 4H chromen 4 one
... stacking is observed, with the distance between the benzene ring centroids, Cg1 Cg1b, being 3.672 (3) A ˚ (see Fig. 2 for details). These interactions are very similar to those observed in our previous report on ... See full document
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Crystal structure of 4 benzyl 2H benzo[b][1,4]thiazin 3(4H) one
... solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012); software used to prepare material ... 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 ... See full document
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Crystal structure of 3 (2,2 dibromoacetyl) 4 hydroxy 2H chromen 2 one
... An excess amount of bromine dissolved in acetic acid was added dropwise to a solution of 3-acetyl-4-hydroxy-2H- chromen-2-one in acetic acid (Fig. 4). During the reaction, the ... See full document
7
Crystal structure of 8 ethoxy 3 (4 nitrophenyl) 2H chromen 2 one
... of 3-ethoxysalicylaldehyde and 0.50 g m (3.083 mmol) of 4-nitro phenylaceto- nitrile were dissolved in ethanol (25 ml), followed by the addition of ... See full document
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Structure of 7 hydroxy 3 (2 methoxyphenyl) 2 trifluoromethyl 4H chromen 4 one
... 1-(2,4-Dihydroxyphenyl)-2-(2-methoxyphenyl)ethan-1-one (1 mmol), trifluoroacetic anhydride (3 mmol) and trimethyl- amine (2 ml) were refluxed for 1 h. After cooling, water (15 ml) was added. The solution ... See full document
10
4 (4 Bromophenyl) 2 methylamino 3 nitro 5,6,7,8 tetrahydro 4H chromen 5 one
... The six membered carbocyclic ring (C8-C10/C11-C13) of the chromene moiety adopts an envelope conformation on C11 atom which deviates by 0.302 (4) Å out of the mean plane formed by the remaining ring atoms. The ... See full document
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rac 7 Methyl 3 [(7 methyl 4 oxochroman 3 yl)methyl] 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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Crystal structure of 4 methyl 7 propoxy 2H chromen 2 one
... The title compound was prepared by SN2 reaction between 7- hydroxy-4-methyl-2H-chromen-2-one and n-propyl bromide. 7-Hydroxy-4-methyl-2H-chromen-2-one (0.4 g, 2.27 mmol) and ... See full document
9
Crystal structure of 4 azidomethyl 6 isopropyl 2H chromen 2 one
... In the title compound (Fig. 1), the benzopyran ring system is essentially planar with a maximum deviation of 0.017 (1)Å for atom C10. Atom N1 of the azido group deviates by 0.168 (2)Å from the mean-plane of the ... See full document
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Spontaneous resolution and crystal structure of (2S) 2 (3 nitrophenyl) 3 phenyl 2,3,5,6 tetrahydro 4H 1,3 thiazin 4 one; crystal structure of rac 2 (4 nitrophenyl) 3 phenyl 2,3,5,6 tetrahydro 4H 1,3 thiazin 4 one
... Geometry . All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, ... See full document
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Crystal structure and Hirshfeld surface analysis of (Z) 4 (4 hydroxybenzylidene) 3 methylisoxazol 5(4H) one
... intramolecular C—H O contact forming an S(7) ring. In the crystal, molecules stack head-to-tail in columns along the b-axis direction, linked by offset – interactions [intercentroid distances of 3.676 (1) and ... See full document
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3 (3 Nitrobenzyl) 4H chromen 4 one
... molecular structure of the title compound is shown in ...the crystal packing, a number of weak intermolecular C—H···O hydrogen bonds are noted and are listed in Table ... See full document
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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
... to one another with a dihedral angle of ...molecular structure is stabilized by an intramolecular N—H···O hydrogen bond, which generates an S(6) ring motif (Table 1 and ... See full document
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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
... 4-Hydroxycoumarin (0.81 g, 5 mmol), 6-bromo-4-oxo-4H-chromene-3-carbaldehyde (0.78 g, 5 mmol) and NMSM (0.74 g, 5 mmol) were mixed in ethanol at room temperature (3 h) in the presence ... See full document
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