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 article, nucleophilic addition of the starting material 3-aryl-1-phenyl-4-formylpyrazoles (1∼3) and 4-substituted aryloxyacetyl hydrazine (4a∼4e) afford hydrazone compounds containg pyrazolyl (5a∆5e, 6a∋6e, 7a∓7e) in the ethanol.
Abstract: Nucleophilic addition of the starting material 3-aryl-1-phenyl-4-formylpyrazoles (1∼3) and 4-substituted aryloxyacetyl hydrazine (4a∼4e) afford hydrazone compounds containg pyrazolyl (5a∼5e, 6a∼6e, 7a∼7e) in the ethanol. These adducts were refluxed in Ac2O and furnished a series of novel bis-hetero-cyclic compounds. (8a∼8e, 9a∼9e, 10a∼10e) via cyclic reaction. The structures of all newly synthesized compounds were established by IR, 1H NMR, MS and elemental analysis. New compounds conducted preliminary tests of antibacterial activities about Fusarium oxyaporium, Verticillium dahliae, Rhizoctonia solani, Pychium aphanidermatum, Alternaria solani, Sclerotinia sclerotiorum. The results showed that the inhibiting rate of the bis-heterocyclic compounds (8a∼8e, 9a∼9e, 10a∼10e) was higher than the pyrazolyl hydrazones (5a∼5e, 6a∼6e, 7a∼7e) obviously.
21 citations
TL;DR: In this paper, a versatile and efficient asymmetric synthesis of 2-mono- and 2-3-trans-disubstituted azetidines with excellent diastereomeric (de = 93 to ⩾ 96%) and enantiomeric excesses in good overall yields is described.
21 citations
21 citations
TL;DR: A method for the separation and characterization of keto acid 2,4-dinitrophenylhydrazones by paper chromatography is reported and both isomers were separated from each other because they were developed in the form of a sodium salt.
21 citations
TL;DR: Palladium-catalyzed asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate with a dimethyl malonate–BSA–LiOAc system has been successfully carried out in the presence of planar chiral phosphine-hydrazone ligands such as 2a in good yields with good enantioselectivities.
21 citations