[PDF] Top 20 Crystal structure of a new polymorph of 3 acetyl 8 methoxy 2H chromen 2 one
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Crystal structure of a new polymorph of 3 acetyl 8 methoxy 2H chromen 2 one
... Derivatives of 2H-chromen-2-one are some of the most important heterocycles in natural and synthetic organic chemistry. These substances are bioactive compounds and have a wide range of ... See full document
9
Crystal structure of 8 hydroxyquinoline: a new monoclinic polymorph
... of 8-hydroxyquinoline with acetaminophen by cocrystallization from chloroform–ethanol solvent mixture at room ...with 8-hydroxyquinoline have been already reported (Prout & Wheeler, 1967; Castellano ... See full document
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Crystal structure of 7 hydroxy 8 [(4 methylpiperazin 1 yl)methyl] 2H chromen 2 one
... liquid crystal (Schadt et ...flexible structure and a high solubility not only in organic solvents but also in water, its derivatives form complexes with various metal ions in chair and boat confor- ...and ... See full document
8
Crystal structure of (4E) 4 (8 methoxy 2H chromen 2 ylidene) 3 methyl 1 phenyl 1H pyrazol 5(4H) one
... solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); ... 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 ... See full document
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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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Crystal structure of 7 [(2E) 2 benzylidene 3 oxobutoxy] 4 methyl 2H chromen 2 one
... C35 0.0454 (7) 0.0492 (7) 0.0348 (6) 0.0043 (6) −0.0035 (5) −0.0045 (5) C36 0.0536 (9) 0.0573 (9) 0.0480 (8) 0.0108 (7) 0.0037 (7) −0.0078 (6) C37 0.0534 (8) 0.0515 (8) 0.0526 (8) 0.0113 (7) ... See full document
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3 Hydroxymethyl 6,8 dimethoxy 2H chromen 2 one
... The title compound was isolated from the endophytic fungus No. 2090 of the mangrove tree from the South China Sea coast. This substance was previously isolated from the organic extracts of the fungus Verticilliumdahliae ... See full document
13
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 (I) To a solution of 1 equiv. of 4-(2-(piperazine-1- yl)ethoxy)-2H-chromen-2-one (1.0 g) in dichloromethane (10 ml) at 273–278 K were added triethylamine (0.7 g, 2.0 equiv.) ... See full document
17
Crystal structure of 2 (3,4 dimethoxyphenyl) 3 hydroxy 4H chromen 4 one
... C9 0.0352 (12) 0.0279 (11) 0.0355 (12) 0.0019 (9) 0.0047 (9) −0.0007 (9) O3 0.0531 (12) 0.0278 (9) 0.0499 (11) 0.0098 (8) −0.0076 (9) −0.0076 (8) C10 0.0287 (11) 0.0295 (11) 0.0319 (11) 0.0007 (9) 0.0056 ... See full document
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Crystal structure of (E) 2 [(4 chloro 2H chromen 3 yl)methylidene] N cyclohexylhydrazinecarbothioamide
... C1 0.0760 (17) 0.0745 (19) 0.0699 (15) 0.0181 (15) 0.0253 (13) 0.0081 (14) C2 0.0698 (17) 0.086 (2) 0.095 (2) 0.0314 (16) 0.0410 (16) 0.0311 (19) C3 0.0520 (14) 0.089 (2) 0.106 (2) 0.0117 (15) ... See full document
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Synthesis, characterization and antimicrobial study of some new schiff’s bases derived from 3 acetyl 4 hydroxy 2H chromen 2 one
... 3-acetyl-4-hydroxy-2H-chromen-2-one (2) is prepared as per previous reported method.[17]The imines (3a-3d, Fig.1) were prepared by adding ... See full document
5
Crystal structure and Hirshfeld surface analysis of 2 [(2 oxo 2H chromen 4 yl)oxy]acetic acid dimethyl sulfoxide monosolvate
... The crystal structure features O—H O and C—H O hydrogen bonds (Table 1; ...Fig. 3). In the crystal, the A and B molecules are linked by O—H O hydrogen bonds, forming chains running along the ... See full document
12
Crystal structure of 2 oxo 2H chromen 3 yl 4 chlorobenzoate and Hirshfeld surface analysis
... Quantum-chemical calculations were performed and the results compared with the experimental analysis. An ab-initio Hartree–Fock (HF) method was used with the standard 6-31G basis set using the GAUSSIAN03 software package ... 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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Crystal structure of 1 (8 methoxy 2H chromen 3 yl)ethanone
... dihydropyran ring is fused with the benzene ring. The dihydropyran ring is in a half-chair conformation, with the ring O and methylene C atoms positioned 1.367 (3) and 1.504 (4) A ˚ , respectively, on either side ... See full document
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Crystal structure of 8 ethoxy 3 (4 nitrophenyl) 2H chromen 2 one
... Coumarin derivatives are found to be one of the major groups of compounds used as fluorescent brighteners (Tian et al., 2000) or fluorescent dyes and they have exhibited good bleed fastness and durability for ... See full document
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Crystal structure of 3 (2,2 dibromoacetyl) 4 hydroxy 2H chromen 2 one
... of 3-acetyl-4-hydroxy-2H-chromen-2-one with bromine in acetic ...the crystal, – interactions between the rings of the bicycle [intercentroid distances = ... See full document
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Crystal structure of 3 [2 (4 methylphenyl)ethynyl] 2H chromen 2 one
... related structure in the literature is of the derivative where the methyl group of the title compound has been replaced by an isopropoxy group (Elangovan et ... See full document
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Synthesis of Biological Active N' (1 (4 Hydroxycumarinyl)Ethylidene) Benzohydrazides
... 3-acetyl-4-hydroxycumarine (d) was synthesized by conventional method [15]. 4-hydroxycumarine (3 g, 18.6 mmoles), 16 ml of acetic acid and 5.6 ml phosphoryl chloride (5.6 ml) mixture was heated at ... See full document
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