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Showing 1 to 13 of 13 for “"substituted phenols"”.
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Regiospecific Synthesis of Ortho Substituted Phenols
… major concern in the regiospecific synthesis of phenols. AES and Directed <em>ortho</em>--Metalation (DoM) are the only ways to directly substitute a proton on an aromatic ring and to synthesize regiospecifically substituted phenols. Phenol is a versatile precursor to a large collection of drugs, …
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One-Pot Synthesis of meta-Substituted Phenols via Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling and Oxidation
We have developed a two-step synthesis of meta-substituted phenols in one pot, in good to excellent yield. A Pd2+ source is the catalyst for both steps of the synthesis, which includes a cross-coupling reaction between -chlorocyclohexenones with boronic acids, followed by aerobic oxidation of the …
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TANDEM BENZANNULATION-CYCLIZATION STRATEGIES FOR THE SYNTHESIS OF HIGHLY SUBSTITUTED INDOLES
… were developed for the synthesis of highly substituted indoles. The benzannulation strategies involved the reaction of vinylketenes (or aryl ketenes) with ynamides or with ynehydrazides to afford highly substituted phenols via a pericyclic cascade mechanism. The vinylketenes were generated …
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Feasibility of analysis of polar compounds by high performance liquid chromatography with Fourier transform infrared spectroscopic detection
… were developed for polar compounds including phenols, alcohols, amines and azaarenes. Detection by FTIR gave information concerning hydrogen bonding and solvent effects occurring during the separations in addition to giving structural information about eluted species to aid in identification. …
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Factors affecting binding of chlorophenols to soil
Synthetic substituted phenols can become incorporated into soil organic matter by processes similar to natural humification. Biological, (enzyme-catalyzed), and abiotic, (mineral surface catalyzed), reactions have been implicated in these processes which result in the nonextractable binding of …
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A STUDY OF ORGANOGELS AND THEIR SOLUTE INTERACTIONS
… for the interaction of solute molecules (substituted phenols, anilines, naphthols) with the organogels were found to be in the range of 1.3 to 500. These partition coefficients are roughly 40 times less relative to the partitioning of the same solutes to AOT reverse micelles in solution. …
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Homogeneous Cobalt Catalyzed Oxidations
Mechanistic studies of the oxidation of various substituted phenols to benzoquinones by Co(II) bis(salicylidene-(gamma)-iminopropyl)-methylamine, CoSalMDPT are described in Chapter I. The reaction is first order in {O(,2)}, {substrate}, and {Co}. A series of experiments are reported to provide …
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Clay mineral catalysed oxidation of phenols
… of our catalysts. Several products, including diphenols, quinones and carboxylic acids, have been identified within the degradation pathway to carbon dioxide and water. Different product isomer ratios are produced depending upon whether the process is thermal or photochemical. Of the catalysts …
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Chemical Studies of some Fungi
The reaction of chloranil with various substituted phenols under basic conditions has been studied. It has been found that the yields of benzobisbenzofuranquinonoid (1) derivatives are greater when after initial nucleophilic attack on the ketoenoid system by the oxygen atom of the phenoxide ion, …
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Revisiting aryl N-methylcarbamate acetylcholinesterase inhibitors as potential insecticides to combat the malaria-transmitting mosquito, Anopheles gambiae
… our project milestone of 100-fold. Among the C2-substituted phenylcarbamates examined (class II), 2'-(2- ethylbutoxy)phenyl N-methylcarbamate (9bd*) was extraordinarily selective (570-fold ± 72). The high level of selectivity observed for many of the class II carbamates was attributed to a …
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Development of oxygenase biocatalysts for the production of synthetically useful cis-diol compounds
… The cis-dihydroxylation of ortho- and meta-substituted phenols by TDO produce cyclohexenone cis-diols. The keto group of cyclohexenone cis¬-diol tautomers increases the functionalisation and stability compared to other arene cis-dihydrodiols. (4S,5S)-dihydroxy-3-iodocyclohexe-2-en-1-one, …
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The Chlorination of Pharmaceuticals and Other Phenolic Compounds in the Presence of Iodide
… predict solution reactivity for a range of substituted phenols as well as PPCPs including bisphenol-A and triclosan. Past studies utilizing pseudo-first-order rate constants to determine a reaction rate over-simplified the analysis of halogen substitution reactions. Free chlorine reaction …
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Sex pheromone studies on the grass grub (Costelytra Zealandica (White)) and the common army worm
… tests were also carried out with a number of substituted phenols but none of these was active. An electroantennogram was developed to measure the antennal response to phenol and a number of closely related phenolic materials. In all the tests, phenol gave the largest response. A comparison at …