نتایج جستجو برای: phenol ortho alkylation
تعداد نتایج: 27115 فیلتر نتایج به سال:
Activation of the Kelch-like ECH-associated protein 1/nuclear factor (erythroid-derived 2)-like 2 and heat-shock protein 90/heat-shock factor-1 signal-transduction pathways plays a central role in combatting cellular oxidative damage and related endoplasmic reticulum stress. Electrophilic compounds have been shown to be activators of these transcription-mediated responses through S-alkylation o...
The donor ortho-dimethyl-TTF-(N-n-Bu-1,2,3-triazole) 1,5-isomer has been synthesized by click chemistry following a ruthenium-catalyzed azide-alkyne cycloaddition procedure. The single crystal X-ray analysis showed a planar conformation between the TTF and triazole units and a set of intermolecular interactions at the supramolecular level in the solid state. The same procedure allowed the prepa...
PAPER Thomas Biet and Narcis Avarvari Tetrathiafulvalene mono-and bis-1,2,3-triazole precursors by click chemistry: structural diversity and reactivity The donor ortho-dimethyl-TTF-(N-n-Bu-1,2,3-triazole) 1,5-isomer has been synthesized by click chemistry following a ruthenium-catalyzed azide–alkyne cycloaddition procedure. The single crystal X-ray analysis showed a planar conformation between ...
BACKGROUND 2,6-dimethylphenol (2,6-DMP) is a product of phenol methylation, especially important for the plastics industry. The process of phenol methylation in the gas phase is strongly exothermic. In order to ensure good temperature equalization in the catalyst bed, the process was carried out using a catalyst in the form of a fluidized bed - in particular, the commercial iron-chromium cataly...
A recently introduced new SPS resin, possessing a 2-(ortho-nitrophenyl)ethanal linker, was used for the regioselective on-resin synthesis of N-mono-hydroxylated and N-mono-methylated polyamine spider toxins of Agelenopsis aperta and Larinioides folium. The polyamine backbones of the target compounds were efficiently constructed from the center by reductive amination of the aldehyde linker, foll...
A series of (E)-N-phenylstyryl-N-alkylacetamides, 5, were synthesized by direct reduction-acetylation of beta-arylnitroolefins, followed by N-alkylation. The title compounds were characterized by (1)H-NMR, EIMS and IR analysis. All the synthesized compounds were assayed as HIV-1 non-nucleoside reverse transcriptase inhibitors. A SAR study revealed that when group R(1) in 5 was ortho-substituted...
A new methodology for the pH-triggered degradation of polymers or release drugs under visible light irradiation based on cyclization ortho-hydroxy-cinnamates (oHC) to coumarins is described. The key oHC structural motif can be readily incorporated into rational design novel photocleavable via click chemistry. This main-chain moiety undergoes a fast photocleavage when irradiated with 455 nm prov...
An iridium(I) catalyst system, modified with the wide-bite-angle and electron-deficient bisphosphine d(F) ppb (1,4-bis(di(pentafluorophenyl)phosphino)butane) promotes highly branch-selective hydroarylation reactions between diverse acetanilides and aryl- or alkyl-substituted alkenes. This provides direct and ortho-selective access to synthetically challenging anilines, and addresses long-standi...
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