4H-CHROMENE
Crystal structure of 6,7 dichloro 4 oxo 4H chromene 3 carbaldehyde
... The mean deviation of the least-square plane for the non-hydrogen atoms of the 4H-chromene ring is 0.0188 Å, and the largest deviation is 0.043 (2) Å for the C3 atom (Fig. 2). The α,β-unsaturated carbonyl ...
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IN SILICO DESIGN, SYNTHESIS, CHARACTERIZATION, IN VITRO ANTI INFLAMMATORY, AND ANTIOXIDANT STUDIES OF 4 ARYL 4H CHROMENE DERIVATIVES
... 4-phenyl-4H chromene derivatives were imperiled to in silico modeling studies at the molecular ...of 4H chromene was carried out by one-step condensation of aldehyde with malononitrile and ...
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Crystal structure of 7 iodo 4 oxo 4H chromene 3 carbaldehyde
... We have previously reported the crystal structures of 6,8-dichloro-4-oxochromene-3-carbaldehyde (6,8-dichloro-3- formylchromone; Ishikawa & Motohashi, 2013) and 6,8-di- ...
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Crystal structure of 6 bromo 7 fluoro 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonds and halogen halogen interactions have recently attracted much attention in medicinal chemistry, chemical biology, supramolecular chemistry and crystal engi- neering (Auffinger et al., 2004; Metrangolo et ...
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Crystal structures of ethyl 6 (4 methylphenyl) 4 oxo 4H chromene 2 carboxylate and ethyl 6 (4 fluorophenyl) 4 oxo 4H chromene 2 carboxylate
... by dihedral angles) may be due to packing factors. Preliminary results for the structures of similar compounds such as 6-(phenyl)-4-oxo-4H-chromene-2-carboxylate, 6-(4-methoxy- ...
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6 Chloro 8 nitro 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonds have been found to occur in organic, inorganic, and biological systems, and have recently attracted much attention in medicinal chemistry, chemical biology and supramolecular chemistry (Auffinger et al., ...
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A green approach for the synthesis of 2-amino-4H-chromene derivatives using Polystyrene-Supported 1-Methylimidazolium tetrachloroferrate as an efficient heterogeneous catalyst in water
... The chromene moiety, including that of 2H-chromene and 4H-chromene, belongs to a major class of natural oxygen-containing heterocycliccompounds, which are widely found in edible fruits and ...
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Crystal structure of 8 bromo 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonding has attracted much attention in medicinal chemistry, chemical biology, supramolecular chemistry and crystal engineering (Auffinger et al., 2004, Metrangolo et al., 2005, Wilcken et al., 2013, Sirimulla et ...
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Crystal structure of 7 bromo 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonding and halogen···halogen interaction have recently attracted much attention in medicinal chemistry, chemical biology, supramolecular chemistry and crystal engineering (Auffinger et al., 2004, Metrangolo et ...
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The crystal structures of four N (4 halophenyl) 4 oxo 4H chromene 3 carboxamides
... The conformational features herein established are prob- ably most relevant for the extrapolation of the inhibitory MAO-B activities of chromone carboxamides as they are related to the intermolecular forces responsible ...
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Polymorphism in the structure of N (5 methylthiazol 2 yl) 4 oxo 4H chromene 3 carboxamide
... The conformation around the amide rotamer for chromone carboxamides can be either -anti or -syn. The former appears to be more probable since it lowers the steric hindrance between the two aromatic rings as compared to ...
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6 Bromo 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonds have been found to occur in organic, inorganic, and biological systems, and have recently attracted much attention in medicinal chemistry, chemical biology and supramolecular chemistry (Auffinger et al., ...
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Crystal structure of 7,8 dichloro 4 oxo 4H chromene 3 carbaldehyde
... I have recently reported the crystal structures of chlorinated 3-formylchromone derivatives 7-chloro-4-oxo-4H-chromene- 3-carbaldehyde (Ishikawa, 2014b), 8-chloro-4-oxo-4H-chro- mene-3-carbaldehyde ...
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Crystal structure of 2 amino 7 hydroxy 4 (4 hydroxyphenyl) 4H chromene 3 carbonitrile
... In the crystal structure, N—H···O, O—H···O, O—H···N and C—H···O hydrogen bonds link the adjacent molecules, forming the three dimensional network (Table 1, Fig. 2). In addition, a weak π-π stacking interaction [Cg1···Cg1 ...
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7 Chloro 4 oxo 4H chromene 3 carbaldehyde
... carbaldehyde (Ishikawa & Motohashi, 2013), and monochlorinated 3-formylchromone derivatives 6-chloro-4-oxo-4H- chromene-3-carbaldehyde (Ishikawa, 2014a) and ...
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6 Chloro 7 fluoro 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonding and halogen···halogen interactions have recently attracted much attention in medicinal chemistry, chemical biology, supramolecular chemistry and crystal engineering (Auffinger et al., 2004, Metrangolo et ...
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Synthesis of 2-Amino-4H-chromene Derivatives under Solvent-Free Condition Using MOF-5
... MOF-5 has been employed as a powerful catalyst for the preparation of 2- amino-4H-chromene. A wide variety of aromatic aldehydes was condensed with malononitrile and 2-naphthol under mild and solvent-free ...
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8 Fluoro 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonds have been found to occur in organic, inorganic, and biological systems, and have recently attracted much attention in medicinal chemistry, chemical biology and supramolecular chemistry (Auffinger et al., ...
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3 Hydroxy 4 oxo 2 phenyl 4H chromene 6 carboxylic acid dimethylformamide solvate
... The chromene molecule of (I) is roughly planar, the largest deviation from the mean plane being 0.241 (2) A ˚ for O4 (Fig. 1). The dimethylformamide solvent and the 3-hydroxo-4- ...
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6 Fluoro 4 oxo 4H chromene 3 carbaldehyde
... monohalogenated 3-formylchromone derivatives 6-bromo-4-oxo-4H-chromene-3-carbaldehyde (Ishikawa, 2014a) and 6- chloro-4-oxo-4H-chromene-3-carbaldehyde (Ishikawa, 2014b). Halogen bonding is ...
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