Results 21 to 30 of about 20,183 (213)

Naphthol Preparations in Disinfection [PDF]

open access: yesthe american journal of the medical sciences, 1906
n ...
openaire   +1 more source

Sulfur‐Boron Lewis Pair‐Catalyzed Hydrohalogenation of Alkynes via Formal Hydrogen Atom Transfer

open access: yesAngewandte Chemie, EarlyView.
A sulfur‐boron Lewis pair enables the stereodivergent hydrohalogenation of alkynes with exclusive Markovnikov selectivity. Mechanistic studies support a proton transfer‐electron transfer (PT‐ET) sequence for vinyl radical formation rather than a concerted hydrogen atom transfer (HAT) pathway.
Yun Soo Shim   +4 more
wiley   +2 more sources

Potentials of N-(2, 4-dinitro-1-naphthyl)-p-toluenesulphonamide and 2, 4-dinitro-1-naphthol as novel charge transfer acceptors in pharmaceutical analysis of some quinolones and cephalosporins

open access: yesFuture Journal of Pharmaceutical Sciences, 2022
Background Quinolones and cephalosporins are antibiotic agents with activity against Gram-positive and Gram-negative bacteria. They contain chromophores and amine groups which are electron-rich centres capable of donating electrons to electron-deficient ...
O. E. Umoh, O. A. Adegoke, D. E. Effiong
doaj   +1 more source

Quantitative analysis of naphthalene, 1-naphthol and 2-naphthol at nanomol levels in geothermal fluids using SPE with HPLC

open access: yesMethodsX, 2023
Naphthalene (NAP), 1-naphthol (1-NAP) and 2-naphthol (2-NAP) are the thermal decomposition products of naphthalene sulfonates making them potentially new geothermal reservoir permeability tracers, however, to date, no sensitive and fast detection method ...
Lucjan Sajkowski   +2 more
doaj   +1 more source

Evaluation of the Effect of Azo Group on the Biological Activity of 1-(4-Methylphenylazo)-2-naphthol

open access: yesE-Journal of Chemistry, 2008
Azo-2-naphthol and 2-naphthol were tested against five microorganisms: Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa and Streptococcus faecalis.
V. Mkpenie   +3 more
doaj   +1 more source

Two-stage steam explosion pretreatment of softwood with 2-naphthol as carbocation scavenger

open access: yesBiotechnology for Biofuels, 2019
Background  Lignocellulosic biomass is considered as a potential source for sustainable biofuels. In the conversion process, a pretreatment step is necessary in order to overcome the biomass recalcitrance and allow for sufficient fermentable sugar yields
Christoph-Maximilian Seidel   +4 more
doaj   +1 more source

Cyclization of Hydrazones of 2-Acetyl-1-naphthol and 1-Acetyl-2-naphthol with Triphosgene. Synthesis of Spiro Naphthoxazine Dimers

open access: yesMolecules, 2009
Cyclization of hydrazones derived from 2-acetyl-1-naphthol and 1-acetyl-2-naphthol with triphosgene gave naphtho[1,2-e]-1,3-oxazines, naphtho[2,1-e]-1,3-oxazines or their spiro dimers depending on the molar ratio of triphosgene used for the cyclization.
Hamad Zaid Alkhathlan   +5 more
doaj   +1 more source

Pd‐Catalyzed Asymmetric Dearomative Heck/Tsuji‐Trost Difunctionalization of Naphthalenes

open access: yesAdvanced Science, EarlyView.
We have developed a palladium‐catalyzed asymmetric dearomative Heck/Tsuji‐Trost 1,4‐difunctionalization reaction of naphthalenes, affording 4‐aminospirocyclohexene oxindole products bearing two remote chiral centers. Through the effect of the newly designed chiral sulfinamide phosphine ligand with large steric hindrance, side reactions are inhibited ...
Long‐Ling Ma   +3 more
wiley   +1 more source

High-Performance Liquid Chromatographic Determination of Naphtholsulfonic Acids

open access: yesCHIMIA, 1979
A HPLC-method for the quantitative analysis of mixed solutions of 2-naphthol-5,7-disulfonic acid and 2-naphthol-7-sulfonic acid was developed. A complete reproducible separation of these compounds in a very short time could be reached by using a ...
Luca Rossinelli   +2 more
doaj   +1 more source

Investigation of Sterol structures and biological activities in Cochineal and Hibiscus sabdariffa extracts

open access: yesInternational Journal of Secondary Metabolite
In the future, it is necessary to discover natural resources with no or less toxicity and side effects instead of synthetic drugs. Therefore, it is crucial to recognize, isolate, measure, and reveal the biological activities of substances in the ...
Mehmet Çadır   +2 more
doaj   +1 more source

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