Results 41 to 50 of about 1,547 (180)

Application of liquid-liquid microextraction based on deep eutectic solvent for preconcentration and spectrophotometric determination of purpurin [PDF]

شیمی کاربردی روز
This research used a simple and efficient liquid-phase microextraction method based on deep eutectic solvents for preconcentration and spectrophotometric determination of purpurin (1, 2, and 4-trihydroxyanthraquinone) dye.
Mojtaba Fathi, Hamid Reza Rajabi, Habibollah Khajehsharifi, Ali Gorjizadeh Kohvadeh   +3 more
doaj   +1 more source

Antibacterial Activity of Synthesized Derivatives of Purpurin Containing Cyсlopropane and Cyclobutane Fragment

Eurasian Chemico-Technological Journal, 2020
The present study is a continuation of the scientific research works for the synthesis of anthraquinonе-containing derivatives with cyclic ring systems by the interaction of 1,2,4-trihydroxyanthraquinone (purpurin) with cyclopropanecarboxylic acid ...
Т. V. Kharlamova, A. V. Gabdrakipov, P. B. Seidakhmetova, K. D. Praliyev   +3 more
doaj   +1 more source

Synthesis and structure of a 5,15-bis(4-pyridyl)purpurin

, 1995
Base catalyzed cyclization of a 5,15-di(4-pyridyl)octaalkylporphyrin-5-acrylate 6 yields smoothly the corresponding purpurin 2. Quaternization with methyl iodide yielded the corresponding cationic N,N′-dimethylpyridiniumpurpurin 3; X-ray crystallography ...
Pandey, Ravindra K., Ravindra K. Pandey,, Kevin M. Smith, Forsyth, Timothy P., Timothy P. Forsyth, Nurco, Daniel J., Daniel J. Nurco, Smith, Kevin M.   +7 more
core   +1 more source

Purpurin specifically inhibits Candida albicans efflux pump Cdr2p

, 2013
Background and aim: A major drug resistance mechanism of the Candida fungi is mediated by membrane-bound efflux pumps. Compounds that inhibit efflux pump activity may have therapeutic relevance.
Tsang, Wai Kei Paul, Yang, H., Tsang, P.C.S., Tsang, PCS, Yang, H, Tsang, WK   +5 more
core   +2 more sources

Synthesis and crystal structures of two purpurin derivatives: 1,4-dihydroxy-2-propoxyanthraquinone and 2-butoxy-1,4-dihydroxyanthraquinone

Acta Crystallographica Section E: Crystallographic Communications, 2017
The title compounds were obtained by deprotonation of 1,2,4-trihydroxyanthraquinone (purpurin) using sodium hydride followed by reaction with either 1-bromopropane or 1-bromobutane.
Eric Bosch, Emily N. McClain
doaj   +1 more source

MurNAc‐Based Electrophilic Inhibitors of O‐Acetylpeptidoglycan Esterase (Ape): Design, Synthesis, and Kinetic Evaluation

Chemistry – A European Journal, EarlyView.
A series of N‐acetylmuramic acid (MurNAc)‐based electrophilic inhibitors targeting Ape esterase was synthesized. Their inhibitory potency ranged from micromolar to submillimolar. The study probed binding contributions of stem peptide extension, replacing the anomeric methyl group with a benzyl, and α‐fluorination of the carbonyl to enhance ...
Dmytro Voskoboinyk, Martin E. Tanner
wiley   +1 more source

Pierre-Jean Robiquet

Educación Química, 2018
Pierre-Jean Robiquet (1780-1840), a French pharmacist, made important contributions in the areas of mineral chemistry, mineral and vegetable pigments, and extractive and analytical chemistry.
Jaime Wisniak
doaj   +1 more source

Ancient Chromophores and Auxiliaries: Phrygian Colorants from Tumulus MM at Gordion, Turkey, ca 740 BCE

Heritage, 2023
This paper discusses colorants found in Tumulus MM, the tomb of King Midas or his father, at Gordion, the capital of the Phrygian kingdom. Chromophores, colorants, and auxiliaries are preserved largely independent of the textiles they once colored.
Mary Ballard, Asher Newsome, Elizabeth Simpson, Brendan Burke   +3 more
doaj   +1 more source

1,2‐Dihydroxyanthraquinone, 6,7‐Dihydroxyisobenzofuranone and 7,8‐Dihydroxyquinolinone Derivatives as Ligands for the Self‐Assembly of Hierarchically Formed Lithium‐Bridged Titanium(IV) Helicates

European Journal of Organic Chemistry, Volume 29, Issue 33, 1 September 2026.
Catechol‐based annulated aromatics with carbonyl units are ideal ligands for the formation of titanium(IV) containing lithium‐bridged hierarchical helicates. They allow for the first time the use of amide units to obtain the dimeric helicate‐type complexes.
Steffen Schauerte, Frauke S. Adamsky, Christian Cremer, Niklas Polter, Markus Albrecht   +4 more
wiley   +1 more source

Purpurin derivatives as visible-light photosensitizers for 3D printing and valuable biological applications

, 2021
We report the synthesis of new visible-light photosensitizers derived from purpurin (mono-allyl-and triallyl-purpurin), and their use as type II photoinitiating systems when associated with N-methyldiethanolamine, bis(4-methylphenyl) iodonium ...
Sautrot-Ba P., Versace D. -L., Malval J. -P., Abbad-Andaloussi S., Chiappone A., Breloy L., Brezova V.   +6 more
core   +2 more sources