The aromatic polyketones 3a-d are versatile compounds for the synthesis of the multi-1,2,3-selenadiazole aromatic derivatives 1a-d. The preparation starts with the reaction between the multi-bromomethylene benzene derivatives 2a-d and 4-hydroxy- acetophenone to give compounds 3a-d which are transformed through the reaction with semicarbazide hydrochloride or ethyl hydrazine carboxylate into the...

Two new macrocyclic hydrazone Schiff bases were synthesized by reaction of succindihydrazide and adipdihydrazide with acetylacetone. Hydrazones have been characterized by elemental analyses and IR, mass, (1)H NMR, and (13)C NMR spectral data. Hydrazones have been studied by liquid-liquid extraction towards the s-metal ions (Li(+), Na(+), and K(+)) and d-metal ions (Cu(2+) and Cr(3+)) from aqueo...

In the present work a new series of 3-alkyl-2,6-diarylpiperidin-4-one-2-thienoyl hydrazones have synthesized by the reaction of 3-alkyl-2, 6-diarylpiperidin-4-one with 2-thiophenecarboxylic acid hydrazide and characterized by spectral (IR, H NMR, C NMR, HSQC, HMBC, NOESY and COSY) techniques. The hydrazones were screened for their in vitro antibacterial and antifungal activities against some se...

An efficient method for the Citric acid-catalyzed synthesis of hydrazones Schiff base using 2,4-dinirtophenyl hydrazine. We have synthesized a series of hydrazones using 2,4-dinirtophenyl hydrazine as a source of amine and substituted aromatic aldehydes and aromatic ketones as a carbonyl source. Synthesized compounds were characterized by FT-IR techniques. Synthesis of above hydrazones using ci...

Metal-free, intermolecular hydroaminations are performed upon heating aryl acetylenes and MeNHNH(2) at 140 degrees C, with preferential formation of the linear, "anti-Markovnikov" hydrazones.

The N-heterocyclic carbene-catalyzed [3 + 3] cyclocondensation of bromoenals and hydrazones is developed to give the corresponding chiral 4,5-dihydropyridazones in good yields with excellent enantioselectivities.

Photochemical reactions of imines, hydrazones, oximes and related compounds provides an efficient access to radical intermediates in the synthesis heterocycles.