2-OXO-2H-CHROMENE
Methyl 2 oxo 2H chromene 3 carboxylate
... Ethyl 2-oxo-2H-chromene-3-carboxylate irreversibly inhibits phospholipase A2 (sPLA2) from Crotalus durissus ruruima venom with an IC50 of ...
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Crystal structures of 4 methyl 2 oxo 2H chromene 7,8 diyl diacetate and 4 methyl 2 oxo 2H chromene 7,8 diyl bis(pent 4 ynoate)
... room temperature in anhydrous THF (2 mL). Ice-cold water (25 mL) was added to the reaction flask, and the filtered crude product was washed with hexanes followed by recrystalliza- tion from ethanol to obtain small ...
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Ethyl-8-ethoxy-2-oxo-2H -chromene-3-carboxylate: Synthesis, characterization, crystal and molecular structure and Hirshfeld surface analysis
... A mixture of 3-ethoxysalicylaldehyde (2 g, 11.48 mmol) and diethylmalonate(1.83 g, (11.48mmol) were dissolved in ethanol (25 ml), followed by addition of catalytic amount of piperidine. This reaction mixture was ...
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Potentiometric and thermodynamic studies of [2 oxo 2h chromene 3 carbohydrazide] and its metal complexes
... ligand dissociation constant of [2-oxo-2H-chromene-3-carbo ligand stability constants of its complexes with metal ions (Ni +2 and Cu +2 ) have been determined potentiometrically ...
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Studies on the synthesis and antimicrobial activity of 2 oxo 2H chromene 3 carbohydrazide derivatives
... 2-(2-Oxo-2H-chromene-3-carbonyl)hydrazinyl)carbonylbenzoic acids (2a,b) and 4-oxo-4-(2-(2-oxo-2H-chromene- 3-carbonyl)hydrazinyl)butanoic acids ...
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Crystal structure of 4 bromophenyl 2 oxo 2H chromene 3 carboxylate
... 4-(octyloxy)phenyl 2-oxo-2H-chromene-3-carboxylate (IV) (Palakshamurthy, Devarajegowda et ...phenyl 2-oxo-7-trifluoro- methyl-2H-chromene-3-carboxylate (V) ...
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Crystal structure of 4 methoxyphenyl 2 oxo 2H chromene 3 carboxylate
... 2-oxo-2H-chromenes (coumarins) have been also used in the field of medicine, cosmetics and fluorescent dyes. They are efficient fluorophores characterized by good emission quantum yields and are used ...
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4 (Octyloxy)phenyl 2 oxo 2H chromene 3 carboxylate
... A mixture of 2-oxo-2H-chromene-3-carboxylic acid (19 mg,1 mmol), 4-(octyloxy)phenol (22.2 mg,1 mmol), N,N -di- cyclohexylcarbodiimide (23 mg,1.2 mmol) and a catalytic quantity of ...
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Crystal structures and Hirshfeld surface analyses of (E) N′ benzylidene 2 oxo 2H chromene 3 carbohydrazide and the disordered hemi DMSO solvate of (E) 2 oxo N′ (3,4,5 trimethoxybenzylidene) 2H chromene 3 carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former
... For both structures, data collection: CrysAlis PRO (Rigaku OD, 2019); cell refinement: CrysAlis PRO (Rigaku OD, 2019); data reduction: CrysAlis PRO (Rigaku OD, 2019); program(s) used to solve structure: OSCAIL (McArdle ...
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4′ Cyanobiphenyl 4 yl 7 diethylamino 2 oxo 2H chromene 3 carboxylate
... The 2H-chromene ring (O2/C5–C13) system in (I) is almost planar, with a maximum deviation of ...between 2H-chromene ring (O2/C5–C13) with the benzene(C15–C20) terminal benzene(C21— C26) rings ...
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7 Diethylamino 2 oxo 2H chromene 3 carbohydrazide
... Data collection: RAPID-AUTO Rigaku Corporation, 1998; cell refinement: RAPID-AUTO; data reduction: CrystalStructure Rigaku/MSC & Rigaku Corporation, 2002; programs used to solve structur[r] ...
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N [1 Hydroxy 3 (methylsulfanylmethylsulfinyl)propan 2 yl] 2 oxo 2H chromene 3 carboxamide
... hydroxy-1H-benzotriazole (0.5 mmol). The reaction mixture was stirred for 24 h at room temperature. Compound (I) was obtained by flash chromatographic purification. Crystals of (I) suitable for single- crystal X-ray ...
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tert Butyl 6 benzoyl 5 hydroxy 2 oxo 2H chromene 4 carboxylate
... The molecular structure of (I) is illustrated in Fig 1. The inclinations of the planes of the t-butoxycarbonyl, hydroxy and benzoyl substitutents with respect to the coumarin ring system are 89.93, 3.15 and 53.80°, ...
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Crystal structures and Hirshfeld surface analyses of (E) N′ benzylidene 2 oxo 2H chromene 3 carbohydrazide and the disordered hemi DMSO solvate of (E) 2 oxo N′ (3,4,5 trimethoxybenzylidene) 2H chromene 3 carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former Corrigendum
... O1 0.40457 (2) 0.68439 (13) 0.52398 (3) 0.01627 (16) O2 0.46021 (2) 0.81610 (14) 0.59671 (4) 0.02005 (17) O31 0.53178 (2) 0.20068 (14) 0.57120 (3) 0.01931 (17) O343 0.72470 (2) 0.31586 (14) ...
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N′ (2 Hydroxybenzoyl) 2 oxo 2H chromene 3 carbohydrazide
... All chemicals used in this work were of analytical grade available commercially. The title compound was prepared by reacting ethyl coumarin-3-carboxylate with an equivalent amount of 2-hydroxy- benzohydrazide ...
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7 Methoxy 2 oxo 2H chromene 3 carboxylic acid
... C8 0.0283 (18) 0.038 (2) 0.036 (2) −0.0008 (16) 0.0032 (16) −0.0028 (17) C9 0.0295 (19) 0.0305 (19) 0.031 (2) 0.0036 (16) 0.0048 (15) −0.0013 (16) C10 0.0278 (19) 0.038 (2) 0.034 (2) ...
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4 (Decyloxy)phenyl 2 oxo 7 trifluoromethyl 2H chromene 3 carboxylate
... For the synthesis and liquid crystal behaviour of the title compound, see: Mahadevan et al. (2013). For the biological activity of coumarins and their derivatives, see: Borges et al. (2005); Kontogiorgis & ...
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4 [4 (Heptyloxy)benzoyloxy]phenyl 2 oxo 7 trifluoromethyl 2H chromene 3 carboxylate
... 7-(trifluoromethyl)- 2-oxo-2H-chromene-3-carboxylate (II), 4-(octyloxy)phenyl 2- oxo-2H-chromene-3 –carboxylate (III) (Palakshamurthy, Sreenivasa et ...
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6 Methyl 2 oxo N (quinolin 6 yl) 2H chromene 3 carboxamide: crystal structure and Hirshfeld surface analysis
... the oxo O atom of the coumarin system allows the establishment of an intra- molecular N32—H32 O2 hydrogen bond between the amino group of the carboxamide and the oxo group of the coumarin system, and of a ...
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Crystal structure of 2 oxo N′ phenyl 2H chromene 3 carbohydrazide
... The 2H-chromene moiety is essentially planar with an r.m.s. deviation of the nine constituent atoms from the mean plane of 0.0093 Å. The dihedral angle between this plane and that of the pendant phenyl ring ...
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