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Showing 1 to 14 of 14 for “"Friedel-Crafts reaction"”.
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Synthetic approaches to a hypervalent trigonal bipyramidal carbon species and a versatile reagent for the oxidation of primary and secondary alcohols to aldehydes and ketones
… Part I. The key step involves an intramolecular Friedel-Crafts reaction of a triarylmethyl cation. Some reactions of this methanol derivative are presented as part of an attempted synthesis of a hypervalent (10-C-5) trigonal bipyramidal carbon species.
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Synthesis of Functionalised Cobalt Sandwich Complexes for Application in Asymmetric Catalysis
The reaction of cobalt sandwich complex (η5-(N,N-dimethylaminomethyl)cyclopentadienyl)(η4-tetraphenylcyclobutadiene)cobalt with sodium tetrachloropalladate and N-acetyl-D-phenylalanine gave planar chiral palladacycle …
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Carbon-Carbon Bonds Formed by Lewis Acid Catalysis or Photoactivation
… to synthetic organic chemists. Ideally, these reactions will be simple, robust, and catalytic. Herein is described the synthesis of tertiary and all-carbon quaternary centers from propargylic alcohols, organoboronates, and Lewis acids. Lewis acids can also be used to facilitate a mild …
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Aromatic acetals : their synthesis and alkylation
… in further investigation. In connection with the reactions, the use of various catalysts was pertinent. Some of the catalysts used were hydrogen chloride, calcium chloride, ferric chloride, aromatic sulfonic acids, and other. There was no data available comparing the sulfonic acids with the …
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Total synthesis and study of myrmicarin alkaloids
… of a P-pyrrolyl enoate, and a regioselective Friedel-Crafts reaction. The synthesis of optically active and isomerically pure samples of (4aR)-myrmicarins 215A, 215B, and 217 in addition to their respective C4a epimers is presented. II. Palladium Catalyzed Synthesis of N-Vinyl Pyrroles and …
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The chemical structure and mechanical properties of phenolic resins and related polymers
… propane.. A resin system was developed using the Friedel Crafts reaction to examine inter-molecular hydrogen bonding at the resin-paper interface. The punching properties of certain selected resins were assessed on a qualitative basis. In addition flexural and dynamic mechanical properties were …
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The application of silica-alumina catalysts to a Friedel-Crafts type reaction
The development of the Friedel-Crafts reaction using anhydrous aluminum chloride in the condensation or aromatic hydrocarbons and alkyl or acyl halides has resulted in many new and diversified applications of this reaction, such as the preparation of hydrocarbons, keto acids, acids, ketones, and …
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Total synthesis of cyclotryptamine and diketopiperazine alkaloids
… tetrahydroxylation and tetrathiolation reactions, as well as a mild strategy for the introduction of the epidithiodiketopiperazine core in the final step, were developed to address this highly sensitive substructure. Our rapid functionalization of the advanced molecular framework aims to …
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An Investigation of the Friedel-Crafts Condensation With Homoterpenyl Methyl Ketone.
In recent years many naturally occurring substances have acquired a great deal of attention, due primarily to their biological or synthetic values. -Pinene is the well known naturally occurring substance which is the main component in longleaf or slash pine tree oleoresin. a-Pinene and some of its …
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Study of organic reactions in pyridinium-based ionic liquids
… of imidazolium-based ionic liquids for organic reactions, while very limited information is available on the application of pyridinium-based ionic liquids. In this study, two different ionic liquids, 1 -ethyl-pyridinium tetrafluoroborate ([EtPy]^+[BF_4]^-) and 1 -ethyl-pyridinium …