starting from readily available 2-substituted-4-methylthiazole-5-carboxylic acid hydrazide (1), the title compounds were prepared. the reaction of compound 1 (r=ch3) with formic acid yielded 1-(formyl)-2-(2,4-dimethylthiazole-5-carboxyl) hydrazine (2). refluxing the latter with phosphorous pentasulfide in xylene afforded compound 3, the reaction of compound 2 with phosphorous pentoxide afforded...

Three shape-persistent aromatic hydrazide macrocycles that bear phenylalanine tripeptide chains have been synthesized. These macrocycles can insert into lipid bilayers to form single-molecular ion channels which exhibit a high NH4(+)/K(+) selectivity.

Three new bivalent nickel hydrazone complexes have been synthesised from the reactions of [NiCl(2)(PPh(3))(2)] with H(2)L {L = dianion of the hydrazones derived from the condensation of o-hydroxynaphthaldehyde with furoic acid hydrazide (H(2)L(1)) (1)/thiophene-2-acid hydrazide (H(2)L(2)) (2)/isonicotinic acid hydrazide (H(2)L(3)) (3)} and formulated as [Ni(L(1))(PPh(3))] (4), [Ni(L(2))(PPh(3))...

The synthesis of a maltol-derived hydrazide is described which, once attached to a cell surface, induces rapid multicellular aggregation selectively in the presence of Fe(3+) ions. Heterocellular aggregates are also reported.

AIM To synthesize some new azetidin-2-ones of ferulic acid and to evaluate them from physicochemical and spectral point of view. MATERIAL AND METHODS The synthesis was carried out in several steps: (i) obtaining the ferulic acid chloride; (ii) obtaining the ferulic acid hydrazide with hydrazine hydrate (98%); (iii) condensation of ferulic acid hydrazide with different benzaldehydes (2-hydroxy...

The three protocols of the comet assay A/N, A/A and N/N were for the first time applied to the plant species Arabidopsis thaliana. The purpose of the experiments was to establish conditions for genotoxic exposure causing DNA damage in Arabidopsis nuclei. This is required for comprehensive gene expression profiling with the intention to screen for genes involved in response of Arabidopsis cells ...

The 1,3,4-oxadiazole is an aromatic heterocycle valued for its low-lipophilicity in drug development. Substituents at the 2- and/or 5-positions can modulate the heterocycle's electronic and hydrogen bond-accepting capability, while exploiting its use as a carbonyl bioisostere. A new approach to 1,3,4-oxadiazoles is described wherein α-bromo nitroalkanes are coupled to acyl hydrazides to deliver...