Results 131 to 140 of about 25,615 (245)

Efficient, One-Pot Synthesis of Tetrahydrobenzo[a]xanthen-11-ones and Dibenzo[a,j]xanthenes Using Trichloroacetic Acid as a Solid Heterogeneous Catalyst Under Solvent-Free Conditions

open access: yesE-Journal of Chemistry, 2011
A simple and efficient method have been described for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives employing a one-pot, three-component reaction of aryl aldehydes, 2-naphthol and dimedone in the presence of ...
Zahed Karimi Jaber   +3 more
doaj   +1 more source

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

open access: yesChemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Microbial desulphonation and naphthol formation from 2-naphthalenesulphonic acid. [PDF]

open access: yes, 2005
Under sulphate limitation, axenic batch cultures of strain RMNTand the mixed culture Co 27 isolated from sulphurous springs metabolize 2-naphthalenesulphonic acid (2NS) and use sulphonate as a source of sulphur.
Botta A. L.   +4 more
core  

Synthesis of Benzopyran Atropisomers via Electrophilic Halogenation

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 27, 17 July 2026.
We report a halogenation‐based method for the synthesis of axially chiral benzopyrans, tolerating diverse substituents and halogens (Br, Cl, and I). A double bromination gives bisbenzopyrans with two stereogenic axes. Preliminary enantioselective conditions yield benzopyran atropisomer with up to 56% ee.
Alix Bourhis   +3 more
wiley   +1 more source

Determinação de cádmio, chumbo e cobalto em matrizes aquosas usando micro extração líquido-líquido-sólido com detecção por SS-GF AAS [PDF]

open access: yes, 2013
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2013.Neste trabalho foram desenvolvidas diversas metodologias de microextração utilizando membranas ...
Carletto, Jeferson Schneider
core  

Anodic oxidation of 2-naphthol at boron-doped diamond electrodes [PDF]

open access: yes
The anodic oxidn. of 2-naphthol in acid media was studied at a synthetic boron-doped diamond thin film electrode (BDD) using cyclic voltammetry and bulk electrolysis.
Michaud, P. A.   +3 more
core   +1 more source

Polysilane‐Supported Nickel as an Efficient Catalyst for the Hydrogenation of Aromatic Compounds†

open access: yesChinese Journal of Chemistry, Volume 44, Issue 14, Page 2277-2282, 15 July 2026.
A Ni/Si catalyst obtained from the reaction of poly(monohydro)silane with Ni(cod)2 serves as an effective heterogeneous catalyst for the hydrogenation of arenes under reaction conditions that are significantly milder than those required for conventional nickel‐based catalysts such as Raney nickel.
Hiromu Baba, Yusuke Sunada
wiley   +1 more source

Green syntheses of 2-naphthol-based oxapolycycles [PDF]

open access: yes, 2011
A review of one‐step cyclization reactions on 2‐naphthol is described in a comprehensive manner, organized by reaction type/class. This is significant, as the following work deals with one‐step cyclizations on a 2‐naphthol framework.
Vaughan, Douglas Gordon
core  

TOXICITY AND LC50 DETERMINATION OF PHENOL AND 1-NAPHTOL IN CASPIAN KUTUM AND BREAM FINGERLINGS

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2003
In this investigation acute toxicity of phenol and 1-naphthol were determined based on OECD guideline in the laboratory. Experimental fishes were Caspian kutum (Rutilus frisii kutum) and bream (Abramis brama orientalis).
F. Shariyati1; A. Esmaeili sari2; M. Piri3
doaj  

Hybrid Aminoferrocenes With Nitrate Esters for In Situ Peroxynitrite Generation: Complex Interplay Between Redox Chemistry, NO‐Donor Reactivity, and Aminoferrocene Activation Influences In Vitro Anticancer Activity

open access: yesChemBioChem, Volume 27, Issue 13, 14 July 2026.
Aminoferrocene‐based prodrugs represent a promising class of redox‐active anticancer agents that can be selectively activated in oxidative cellular environments. However, activation of these systems typically relies on reactive oxygen species (ROS) and is therefore inefficient in intracellular compartments with low ROS levels, such as the cytoplasm. In
Hülya Gizem Özkan   +5 more
wiley   +1 more source

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