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Showing 1 to 11 of 11 for “"Tertiary amides"”.
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Beta'-Lithiation of Alpha, Beta-Unsaturated Amides
… secondary and tertiary amides is reported. N-Methyl-1-cyclohexenecarboxamide and N-methyl-1-cyclopentenecarboxamide are metalated at nitrogen and at the (beta)'-carbon with either sec-butyllithium/TMEDA at -78(DEGREES)C or n-butyllithium at 0(DEGREES)C. Further …
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Remote Lithiations of Carboxamides: The Manifestation of a Post-Complexation Proximity Effect (Homoenolate)
The remote metalations of tertiary amides, (beta) and (gamma) substituted with vinyl, phenyl and thiophenol groups, are reported. N,N-Diisopropyl-2-methylpent-4-enecarboxamide (59), N,N-diisopropyl-2-methyl-3-phenylpropanecarboxamide (139), N,N-diisopropyl-2-methyl-3-phenylthiopropanecarboxamide …
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The development of novel organocatalytic and transition-metal catalysed methodologies for amide bond formation
… the synthesis of a diverse range of acyclic tertiary amides and chiral secondary amides, with the latter synthesised in good to excellent levels of stereoretention (Scheme 1.1). Additionally, a multicomponent approach enabling the formation of secondary amides fromepoxides, amines and …
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Investigations of Catalysts Which Utilise Non-Covalent Interactions to Control Enantioselectivity in Rhodium-Catalysed Amination of C(sp3)–H Bonds
… examines the corresponding amination of aryl tertiary amides, a deceptively divergent system given the loss of a substrate-based hydrogen bond-donor. This substrate class proved effective, however, and both yield and enantioselectivity here surpassed those for the analogous alcohol-directed …
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On the design and further applications of iridium (I) complexes in hydrogen isotope exchange processes
… catalytic labelling methods for primary sulfonamides and aldehydes. Finally, a novel, one-parameter approach has been developed to describe chelating and monodentate ligand spheres on the same comparable and quantifiable footing. Chelating NHC/phosphine-ligated iridium catalysts have been …
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Generation of Alkyl Radicals Via C-H Functionalization and Halogen Atom Transfer Processes
… This reaction converts secondary and tertiary amides, sulfonamides, and carbamates into the corresponding amido-N,S-acetal derivatives in good yields, using an earth abundant metal catalyst under mild conditions. Finally, we present a photoredox polyfluoroarylation of alkyl halides via …
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Palladium-catalyzed C-N cross-coupling and application to the synthesis of delayed singlet emitters for OLED development
… C-N cross-coupling between primary amides and five-membered heterocyclic bromides that contain multiple heteroatoms was achieved for the first time using the Pd/AdBrettPhos catalyst system. This system allows for efficient access to Narylated imidazoles, pyrazoles, thiazoles, …
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Anion effects in Homogeneous Palladium and Gold Catalysis
… such as electron withdrawing groups, tertiary amides, and benzylic alcohols and amines. The coordinating abilities of these anions were analyzed with the techniques described above, with fairly large differences observed between the various functionalities. Further functionalization of …
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Supramolecular Chemistry at the Polymer-Oil Interface
… of 2,5-diiodo-1,3,4,6-tetrafluorobenzene with tertiary amides were studied. With N,N-dimethylformamide, a 1:2 co-crystal was seen but the structure with N-methyl-2-pyrrolidone had a stoichiometry of 1:1. In both structures the oxygen of the amide is involved in a halogen bonding; however, for …
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Metal-catalyzed reactions.
… access to the necessary 12 e- metal center. Tertiary amides were first investigated as directing groups for these reactions. The isomer expected for a directed reaction was formed under the reaction conditions. Upon further investigation, it was discovered that a facile background reaction …