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Showing 1 to 20 of 76 for “"benzophenone"”.
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Benzophenone Derivatives of Hexitols in tthe Carbohydrate Series
It is known that hydroxyl groups in sugars have been blocked by various methods to facilitate analytical, synthetic and structural problems. Benzoates, methyl groups, acetal groups, etc. have been used for this purpose. |For example, compounds of glucosides with aromatic aldehydes were synthesized …
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Solid-State Chemistry of Benzophenone Anils (x-Ray, Crystallography)
The crystal structures of some benzophenone anils were determined by X-ray diffraction. In five of the six structures the molecules adopted the trans configuration. The strong preference for this isomer in the solid state is in sharp contrast to the behavior in solution where previous workers found …
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Kinetics and Mechanism of the Reaction of 4,4'-Dimethoxythio Benzophenone With Grignard Reagents
… mechanism of the reaction of 4,4'-dimethoxythiobenzophenone with Grignard reagents was investigated kinetically by stopped-flow spectroscopy. The reaction of this thioketone with methylmagnesium bromide in ether at 25.0(DEGREES)C was found to be first order in thioketone and first order in …
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The proof of structure of 9-cyclohexylanthracene and the syntheses of 2',3' and 4'-methyl-2-(α-naphthylmethyl)-benzophenones and 2-(α-naphthylmethyl)-benzophenone
In 1947, while working on the aromatic cyclodehydration of ketones to their corresponding substituted anthracenes, Vingiello (1a) attempted to prepare 9-cyclohexylanthracene using this method. It was evident in the cyclization of o-benzylcyelohexyl-phenone (I) that the hydrol (II) postulated as an …
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Part A, Synthesis of new 2-substituted-3-aryl-4(3H)-quinazolinones as potential CNS agents: part B, Reactions of β-diketones with benzophenone in the presence of potassium hydride
… trapping experiments using benzyl chloride and benzophenone to form the corresponding terminal derivative of the diketone. Addition of benzophenone to a THF solution of the monopotassio salts of acetylacetone and benzoylacetone at room temperature resulted in rapid evolution of a second …
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Development and application of palladium-catalyzed carbon-nitrogen bond forming reactions
… method for the preparation of N-aryl benzophenone hydrazones is described. The use of 1-2.5 mol % of a Pd/BINAP based catalyst provides N-aryl benzophenone hydrazones in good yields. Using a Pd/9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (Xantphos) catalyst the desired hydrazones …
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Design and synthesis of probes for detection of protein-protein interaction and RNA localization
The use of the ketone biotin - benzophenone-biotin hydrazide system for detecting the formation of cyan fluorescent protein and NF-kappaB p50 dimers was assessed. A series of benzophenone-based probes were synthesized and tested for photocrosslinking activity to investigate the efficiency of …
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Chemical and enzymatic tools to study proteins in their native cellular environment
… and using LplA to site-specifically target a benzophenone photocrosslinker. Our observations led us to the conclusion that although benzophenone is generally regarded as the more efficient and specific photocrosslinker than aryl azide and diazirine, its high geometric constraint to its …
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Synthesis and Characterization of Multiblock Copolymers for Proton Exchange Membrane Fuel Cells (PEMFC)
… Four arylene chlorides monomers (2,5-Dichlorobenzophenone and its derivatives) were first successfully synthesized from aluminum chloride-catalyzed, Friedel-Crafts acylation of benzene and various aromatic compounds with 2,5-dichlorobenzoyl chloride. These monomers were then polymerized via Ni …
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Synthesis, Characterization, Processing and Physical Behavior of Melt-Processible Acrylonitrile Co- and Terpolymers for Carbon Fibers: Effect of Synthetic Variables on Copolymer Synthesis
… of acrylonitrile/ methyl acrylate/acryloyl benzophenone in the molar ratio of 85/14/1. This thesis describes a systematic variation of the polymerization variables in the emulsion polymerization which may further enhance the system. In particular, the effects of chain transfer agent, …
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Preparation of N,N'-Dialkyl bis(diamino) diphenylmethanes and N,N'-Dialkyl bis(diamino) benzophenones: preparation of B-hydroxy sulfonamides and B-hydroxy sulfinamides
… and N,N'-dialkyldiaminobenzophenones were successfully prepared from the respective primary amines via alkylation of their methanesulfonamide derivatives. Initially N,N'-diaminodiphenylmethanes and N,N'-diaminobenzophenones were treated 0 with 2.2 equivalents of …
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Modelling the morphology of molecular crystals
… as well as DH and AE models were applied to benzophenone. All the models gave the same theoretical morphology. One problem remaining in the field of relating crystal structure and morphology is that of polar morphology. None of the current methods can account for a polar morphology. Surface, …
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The preparation of some unsymmetrical ortho substituted ̲o-dibenzoylbenzenes and 1,3-diphenylisobenzofurans
… type of synthesis in which substituted o-benzylbenzophenones (I) are oxidized to o-diaroylbenzenes (II) and subsequently reduced to 1,3-diarylisobenzofurans (III). It is seen that this latter method affords a greater variety of substituents for these types of compounds than the other methods. …
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The formation and chemistry of certain heterocyclic dianions
… reactions of the glutarimide dianion with benzophenone, 9-fluorenone, cyclohexanone, and anisaldehyde yielded tertiary and secondary alcohol derivatives which were subsequently dehydrated to form unsaturated glutarimides. The two diastereomeric alcohols resulting from condensation of the …
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The preparation of polynuclear compounds containing the thiophene ring system
… series. 2'-Thienyl-2-benzylbenzophenone was prepared and cyclized to 9-(2-thienyl)-anthracene by the conventional methods in good yields. 3'-Thienyl-2-benzylbenzophenone was prepared in a different way, indirect and tedious. Thiophene was iodinated to tetraiodothiophene and …
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Dopamine Transporter (DAT) and Metabotropic Glutamate Receptor 5 (MGLU5) Irreversible Probes for Identifying Anti-Psychostimulant Therapeutics
… contain a photoreactive group (e.g., aryl azide, benzophenone) and a tag (e.g., 125I, terminal alkyne, aliphatic azide). These compounds were then subjected to DAT pharmacological evaluation in order to identify suitable candidates for DAT structure-function studies. Under the second aim, …
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Reactivity of Aluminum Carbenoid with Unsaturated Substrates
… Reaction of NacNacAl with one equivalent of benzophenone affords η2(C,O) adduct III-2 that undergoes cyclization reactions with benzophenone (III-3), aldimine (III-4), quinoline (III-5), pyridine (III-6), phenyl nitrile (III-7), trimethylsilyl azide (III-8), and a saturated cyclic thiourea …
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Inhibitors of human cathepsin L and cruzain as therapeutic agents.
… and α, β-unsaturated carbonyl derivatives of benzophenone, propiophenone, α- and β-tetralone, 4-chromanone, and 4-thiochromenone were evaluated as inhibitors of human cathepsin L. While most of the compounds had IC50 values in the range of 0.4 µM or greater, four were very effective inhibitors …
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Study of the oxidative degradation of 2,2,3,4,5-pentaphenyl-3- cyclopentenone by various oxidants ; and, [1,5]-sigmatropic phenyl rearrangements in 2- and/or 5-(p- or m-substituted phenyl)-1,3,4-triphenyl-2,4- cyclopentadien-1-ols: electronic effects at the migration terminus
… produced an equimolar mixture of benzil, benzophenone, and benzoic acid in an overall yield of 40 to 42 percent.
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