Topic
Hydrazone
About: Hydrazone is a research topic. Over the lifetime, 4853 publications have been published within this topic receiving 65160 citations. The topic is also known as: hydrazone.
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TL;DR: Density functional theory calculations on ligands 1-4 indicate that the energy gaps between the highest occupied molecular orbitals (HOMOs) and the lowest unoccupied molecular orbital (LUMOs) of these ligands are in the following order 1>2>3, which is consistent with the redshift of the emission spectra.
23 citations
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TL;DR: Indole-2-carboxylic acid hydrazide was prepared and allowed to react with aromatic aldehydes in acidic medium to give the corresponding hydrazone derivatives in good yields.
Abstract: Indole-2-carboxylic acid hydrazide was prepared and allowed to react with aromatic aldehydes in acidic medium to give the corresponding hydrazone derivatives in good yields. The hydrazones were cyclized to indolo[2,3-d]pyridazine derivatives by refluxing with acetyl chloride. The indole carbohydrazide was converted to 2-triazolylindoles which acted as starting materials for several indole derivatives. A number of new indole derivatives were also prepared and structurally confirmed.
23 citations
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TL;DR: In this article, a methaniminium hydrazone ligand was used in synthesis of mononuclear Mn(II, Co(II), Ni(II) and Cd(II).
23 citations
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TL;DR: A ruthenium-catalysed redox-neutral α-alkylation of unsaturated alcohols through the synergistic relay of olefin isomerization (chain-walking) and 'umpolung' hydrazone addition, which impeccably takes advantage of the interaction of the two comparatively inefficient clause reactions to enable them to occur in an efficient way.
Abstract: Herein, we report a ruthenium-catalyzed redox-neutral α-alkylation of unsaturated alcohols based on a synergistic relay process involving olefin isomerization (chain walking) and umpolung hydrazone addition, which takes advantage of the interaction between the two rather inefficient individual reaction steps to enable an efficient overall process. This transformation shows the compatibility of hydrazone-type "carbanions" and active protons in a one-pot reaction, and at the same time achieves the first Grignard-type nucleophilic addition using olefinic alcohols as latent carbonyl groups, providing a higher yield of the corresponding secondary alcohol than the classical hydrazone addition to aldehydes does. A broad scope of unsaturated alcohols and hydrazones, including some complex structures, can be successfully employed in this reaction, which shows the versatility of this approach and its suitability as an alternative, efficient means for the generation of secondary and tertiary alcohols.
23 citations
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TL;DR: In this paper, the diazotization, coupling and metallization process was employed to create hydrazone chelating ligand (HL) and its Co(II), Cu(II) and Ni(II)) complexes.
23 citations