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: In this paper, a reductive mono-alkylation method of amines (primary and secondary), 1,2-phenylenediamine, O -trimethylsilylhydroxylamine, and N, N -dimethylhydrazine was developed using LiClO 4 (5m) as a source for in situ generation of imine, iminium ion, oxime, and hydrazone, and zirconium borohydride-piperazine complex as reducing agent.
29 citations
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TL;DR: In this article, the Schiff base ligands HL1 and HL2 were used to synthesize dioxomolybdenum(VI) complexes, which are characterized by elemental analyses, electronic spectra, IR, 1H NMR, magnetic measurements, EPR and cyclic voltammetry.
29 citations
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TL;DR: Some new hydrazone derivatives 3a-e have been obtained from 2-amino-3-formylchromone (1) as discussed by the authors, and they were screened for their antimicrobial activity.
Abstract: Some new hydrazone derivatives 3a–e have been obtained from 2-amino-3-formylchromone (1). Heterocyclization of thiocarbohydrazone derivative 3e via reaction with some electrophilic reagents afforded 1,2,4-triazoles 6–8 and 1,2,4-triazines 9–13. Condensation reactions of aldehyde 1 with o-aminoaldehydes and/or ketones afforded some new isolated and condensed heterocyclic systems 17, 19, and 20. The newly synthesized compounds were screened for their antimicrobial activity.
29 citations
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TL;DR: The asymmetric total synthesis of the (+)-enantiomer of mefloquine hydrochloride is described and the key asymmetric transformation utilized is a novel asymmetric Darzens reaction of a chiral α-chloro-N-amino cyclic carbamate hydrazone derived from an N-amINO cycliccarbamate (ACC) chiral auxiliary.
29 citations
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TL;DR: Three new dysprosium(III) complexes were synthesized and characterized and ab initio calculations illustrate that the disposition of predominant Dy-Ophenoxy bonds affects the magnetic anisotropy of the Dy( III) ions and relaxation processes of complexes 2 and 3.
Abstract: Three new dysprosium(III) complexes [Dy2(HL1-o)2(L1)(NO3)3][Dy(NO3)5]·1.5ACE·0.5Et2O (1), [Dy(L1)3]·2.5MeOH·MeCN (2), and [Dy(L2)3]·MeOH·MeCN (3) (HL1 = rhodamine B salicylaldehyde hydrazine, HL2 = rhodamine B 3-methylsalicylaldehyde hydrazine) were synthesized and characterized. Purple complex 1 contains two ring-open ligands HL1-o and shows fluorescence of the rhodamine amide moiety, whereas yellow complexes 2 and 3 are comprised of ring-close ligands (L1/2)− and display fluorescence of the salicylaldehyde Schiff base part. For 2 and 3, Dy(III) ions are nine coordinated by the six oxygen and three nitrogen atoms of three chelate (L1/2)− ligands, but the arrangements of the three ligands are different owing to the methyl substituent on HL2. There are three short predominant Dy–Ophenoxy bonds in 2 and 3. The largest Ophenoxy–Dy–Ophenoxy angle is 148.64(17)° for 2 and 89.63(13)° for 3. Magnetic studies reveal that complex 2 is a field-induced single-molecule magnet (Ueff = 104.2 K under a dc magnetic field...
29 citations