Condensation of 2,5-diethoxyterephthalohydrazide with 1,3,5-triformylbenzene or 1,3,5-tris(4-formylphenyl)benzene yields two new covalent organic frameworks, COF-42 and COF-43, in which the organic building units are linked through hydrazone bonds to form extended two-dimensional porous frameworks. Both materials are highly crystalline, display excellent chemical and thermal stability, and are ...

Epilepsy is a neurological condition which is characterized by unprovoked seizures resulting from abnormal discharge of cerebral neurons and affecting at least 50 million people worldwide. There is continuing demand for new anticonvulsant agents as it has not been possible to control every kind of seizure with existing antiepileptic drugs. Moreover, conventional antiepileptic drugs exhibited un...

The title hydrazone compound, C(15)H(13)N(3)O(3), was prepared by the condensation of 4-nitro-benzaldehyde with 2-methyl-benzohydrazide in methanol. The dihedral angle between the two benzene rings is 14.8 (2)°. In the crystal, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains along the a axis.

Reaction of some aroylhydrazones with Co(II) and Ni(II) salts were investigated and the corresponding complexes were isolated. Magnetic and spectral data showed that in the case of metal chloride and nitrate octahedral complexes were formed, with Iigands coordinated as neutral molecules. In the case of Ni(II) acetate square planar complexes and with Co(lI) acetate paramagnetic complexes were ob...

The alpha-alkylation of N-sulfonyl hydrazones via in situ-derived azoalkenes provides an umpolung approach to ketone alpha-alkylation that has considerable potential with regard to catalysis and the direct incorporation of functionality not amenable to the use of enolate chemistry. Herein, we describe the first Cu(I)-catalyzed addition of Grignard reagents to in situ-derived N-sulfonyl azoalken...

a series of new 2-(phenylthio) benzoylaryl hydrazones were synthesized by acid-catalyzed condensation of hydrazide 3 with corresponding aldehydes. the chemical structures of the compounds were elucidated by ft-ir, 1h-nmr and mass spectra. all newly synthesized compounds were evaluated for their antimycobacterial activities against mycobacterium tuberculosis h37rv using the microplate alamar blu...

The copper catalyzed reaction of N-monosubstituted hydrazones with carbon tetrabromide leads to formation expected dibromodiazadienes and unexpected dibromostyrenes. experimental theoretical study the revealed a key role N-centered radicals, which can eliminate aryl radicals form corresponding Alternatively, oxidation intermediate by Cu(II) results in diazadienes. These two pathways are competi...