Results 11 to 20 of about 10,732 (222)
Synthesis, Spectral Characterization and Biocidal Studies of Copper(II) Complexes of Chromen-2-one-3-carboxy Hydrazide and 2-(Chromen-3'-onyl)-5-(aryl)-1,3,4-oxadiazole Derivatives [PDF]
E-Journal of Chemistry, 2011 Copper(II) complexes of chromen-2-one-3-carboxyhydrazide and 2-(chromen-3'-onyl)-5-(aryl)-1,3,4-oxadiazole derivatives have been synthesized. The structural features have been determined from their microanalytical, magnetic susceptibility, molar ...
Glory Mathew +3 more
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Фармация и фармакология (Пятигорск), 2021 The aim is based on the results of the in silico prediction, to obtain and characterize a number of (E)-3-(3-(4-oxo-4H-chromen-3-yl)acryloyl)-2H-chromen-2-one derivatives, and also to study their antioxidant activity.Materials and methods.
S. S. Shatokhin +4 more
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Molecules, 2006 (7-Hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid hydrazide (2) was prepared from (7-hydroxy-2-oxo-2H-chromen-4-yl)-acetic acid ethyl ester (1) and 100% hydrazine hydrate.
Elizabeth Has-Schon +3 more
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(E)-4-Methyl-N′-[(4-oxo-4H-chromen-3-yl)methylidene]benzohydrazide
Acta Crystallographica Section E, 2014 In the title chromone-tethered benzohydrazide derivative, C18H14N2O3, the 4H-chromen-4-one and the –CH=N–NH–CO– units are each essentially planar, with the largest deviations from thei planes being 0.052 (2) and 0.003 (2) Å, respectively.
Yoshinobu Ishikawa, Kohzoh Watanabe
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8-Iodo-4-methyl-2-oxo-2H-chromen-7-yl Benzenesulfonate
MolbankWe report a straightforward and efficient synthesis of 4-methyl-2-oxo-2H-chromen-7-yl benzenesulfonate (3a) and 8-iodo-4-methyl-2-oxo-2H-chromen-7-yl benzenesulfonate (3b) in good yields through an O-sulfonylation reaction of 7-hydroxy-2H-chromen-2-ones ...
Luis Pulido-Moreno +5 more
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2-Oxo-2H-chromen-7-yl 4-chlorobenzoate
Molbank, 2021 We describe the synthesis of 2-oxo-2H-chromen-7-yl 4-chlorobenzoate 3 in 88% yield by the O-acylation reaction of 7-hydroxy-2H-chromen-2-one 1 with 4-chlorobenzoyl chloride 2 in dichloromethane using a slight excess of triethylamine at 20 °C for 1 h. The
Diana Becerra +2 more
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Synthesis and Antimicrobial Activity of Some 3-(5-Phenyl-4,5-dihydro-1-substitutedpyrazol-3-yl) chromen-2-one [PDF]
E-Journal of Chemistry, 2010 The title compounds were synthesized by condensation of 3-acetyl chromen-2-one with benzaldehyde in presence of alcoholic sodium hydroxide to get intermediate 3-(3-phenyl acryloyl) chromen-2-one, which were further treated with hydrazine hydrate to get 3-
B. Lakshminarayanan +3 more
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(E)-3-[3-(2-Butoxyquinolin-3-yl)acryloyl]-2-hydroxy-4H-chromen-4-one
Molbank, 2018 The coumarinyl-quinolinylchalcone hybrid (E)-3-[3-(2-butoxyquinolin-3-yl)acryloyl]-2-hydroxy-4H-chromen-4-one 3b was prepared in good yield from a Claisen-Schmidt condensation reaction between 3-acetyl-4-hydroxy-2H-chromen-2-one 1 and 2-butoxyquinoline-3-
Rodrigo Abonia +3 more
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, 2022 An efficient one-stage method for the preparation of substituted methyl 3-(3-hydroxy-4-oxo-4H-chromen-2-yl)propanoates was developed. The suggested approach based on multicomponent reaction of 3-hydroxy-4H-chromen-4-one with carbonyl compounds and ...
Valeriya G. Melekhina (9682064) +2 more
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, 2023 For the first time, novel method for the preparation of previously undescribed substituted 2-arylfuro[3,2-b]chromen-3-ylacetic acids was developed. The considered approach includes multicomponent reaction of various arylglyoxals, 3-hydroxy-4H-chromen-4 ...
Valeriya G. Melekhina (9682064) +3 more
core +1 more source