2H-CHROMENE
2H Chromene 2 thione
... Coumarin has been identi®ed as an important compound in the area of photochemistry, especially as a building block in the crystal lattice for photo-cycloaddition reactions (Vishnu- murthy et al. , 2001). Coumarin ...
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4 (Decyloxy)phenyl 2 oxo 7 trifluoromethyl 2H chromene 3 carboxylate
... A mixture of 7-(trifluoromethyl)-2-oxo-2H-chromene-3-carboxylic acid (0.100 g, 0.1 mmol), 4-(decyloxy) phenol (0.100 g, 0.1 mmol) dicyclohexylcarbodiimide (DCC) (0.100 g, 0.1 mmol) and catalytic quantity 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)
... 4-Methyl coumarin derivatives have previously been used as acetyl-group donors for post-translational modification of proteins via an acetyl–CoA independent mechanism (Raj, Singh et al., 2005; Raj, Kumari et al., 2006). ...
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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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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 as materials ...
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Crystal structure of 4 bromophenyl 2 oxo 2H chromene 3 carboxylate
... probes and laser dyes (Chandrasekharan et al., 2002). In continuation of our work on 2-oxo-2H-chromene derivatives (Sreenivasa et al., 2013; Palakshamurthy, Sreenivasa et al., 2013; Palakshamurthy, ...
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Studies on the synthesis and antimicrobial activity of 2 oxo 2H chromene 3 carbohydrazide derivatives
... Phthalic anhydride was reacted with 2-oxo-2H-chromene-3-carbohydrazides (1a,b) in dry toluene to form 2-(2- oxo-2H-chromene-3-carbonyl)hydrazinyl)carbonylbenzoic acids(2a-d) ( scheme 1 ). The ...
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4 (Octyloxy)phenyl 2 oxo 2H chromene 3 carboxylate
... The 2H-chromene ring (O1/C1–C9) system is planar, with a maximum deviation of ...between 2H-chromene ring (O1/C1–C9) and benzene ring (C11–C16) is ...
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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 at 298, 308 and 318 K. The ...
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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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4 [4 (Heptyloxy)benzoyloxy]phenyl 2 oxo 7 trifluoromethyl 2H chromene 3 carboxylate
... As a part of our continued efforts to study the structure of coumarin based liquid crystals (LC), we report herein the crystal structure of 4-(4-(heptyloxy)benzoyloxy)phenyl ...
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A Simple and Convenient Synthesis of Isolated Fused Heterocycles Based on: 2 Imino N phenyl 2H chromene 3 carboxamide
... Starting from 2-imino-N-phenyl-2H-chromene-3-carbox-amide, (1) a series of functionalized chromenes were achieved; such as, 2-ethoxy-2,3-dihydro-3-phenylchromeno[2,3-d]pyrimidin-4-one (2), and ...
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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
... The N-acylhydrazone functional group, –C(O)—NH— N CH–, is found in many compounds having important and diverse biological activities (Fraga & Barreiro, 2006; Singh et al., 2016), including their use in the fight ...
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DESIGN, SYNTHESIS AND ANTICANCER ACTIVITY OF STRUCTURALLY MODIFIED 1, 3, 4-OXADIAZOLE INCORPORATED 2H-CHROMENE DERIVATIVES AS ANTICANCER AGENTS
... In view of above biological information of chromenes and 1, 3, 4-oxadiazole moieties, it is worth full to combined these two moieties in the single frame work and to know the biological effects of these moieties. We have ...
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Succinimidyl 7 methoxy 2H chromene 3 carboxylate
... The title compound, (2), was obtained from the reaction of 7-meth- oxy-2H-chromene-3-carboxylic acid, (1), with N-hydroxysuccinimide, whose preparation has been described previously (Berthelot et al., ...
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Methyl 2 oxo 2H chromene 3 carboxylate
... Coumarins (2H-1-benzopyran-2-ones) are natural lactones and amongst the best known oxygen heterocycles, well represented as a structural motif in numerous natural products (Surya et al., 2006). Various coumarin ...
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6,8 Dibromo 3 nitro 2 phenyl 2H chromene
... 3-Nitro-2H-chromene derivatives are important intermediates for synthesis of (-)-epigallocatechin gallate (EGCG) which is a promising candidate for drug development for its cancer preventive, antiviral, and ...
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8 Methoxy 2H chromene 3 carbaldehyde
... Chromenes have been important heterocyclic components in biologically active pharmaceuticals which show anti- inflammatory (Gebhardt et al. 2007) and anticancer (Mun et al., 2012) activities. The ...
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tert Butyl 6 benzoyl 5 hydroxy 2 oxo 2H chromene 4 carboxylate
... Data collection: APEX2 Bruker, 2005; cell refinement: APEX2; data reduction: APEX2; programs used to solve structure: SHELXTL Sheldrick, 2008; programs used to refine structure: SHELXTL;[r] ...
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N′ (2 Hydroxybenzoyl) 2 oxo 2H chromene 3 carbohydrazide
... Data collection: TEXRAY Molecular Structure Corporation, 1999 ; cell refinement: TEXRAY; data reduction: TEXSAN; programs used to solve structure: SHELXS97 Sheldrick, 1997; programs used[r] ...
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