A NOVEL SYNTHETIC PROTOCOL FOR THE BIS-TRIAZOLONES DERIVATIVES THROUGH CORRESPONDING N1-ETHOXYCARBONYL-N1-TOSYLHYDRAZONATES

A simple method has been developed for the synthesis of bis-triazolones 2a-n starting from N1-ethoxycarbonyl-N1-tosylhydrazonates 1 and aliphatic diamine. It affords a number of bis-triazolones 2a-n  in reasonable yields. The structures of all new compounds were elucidated using infrared, 1H and 13C NMR studies as well as elemental analysis. Some of these reactions provide successful means to produce biologically important structures

Synthesis and crystal structure of N1-tosylacetylamidrazone

The condensation of two molar equivalents of N1-tosylhydrazonate 1 with one molar equivalent of 1,2-diaminoethane give birth to amidrazone in good yields. The structure of the synthesized compound was identified by X-ray diffraction, IR spectroscopy and nuclear magnetic resonance.Â

Exploration of new chiral hybrid semiconducting palladium halide complexes: [(R)/(S)-2-Methylpiperazinediium]PdCl4

International audienceChiral organic-inorganic halogenometallate hybrids have attracted significant research interest in various fields from optoelectronic to photovoltaic devices. However, to this day the range of available chiral hybrid metal halides still remains limited. In this context, single crystals of organically templated chiral chloropalladate (II), [(R)/(S)-C5H14N2]PdCl4, have been synthesized. Each of the chiral molecular compound consists of (R) or (S)-2-methylpiperazinediium [C5H14N2](2+) cations and [PdCl4](2-) anions. The complexes, [(R)/(S)-C5H14N2]PdCl4 crystallize in the chiral space group P2(1)2(1)2(1) (No. 19), which exhibits the enantiomorphic crystal class 222 (D2). In the crystal structure, the [PdCl4](2-) anions are linked to the organic cations through N-H center dot center dot center dot Cl and C-H center dot center dot center dot Cl hydrogen bonds to form cation-anion-cation molecular units. The incorporation of a protonated (R) or (S)-2-methylpiperazine cations into the same inorganic halide systems leads to similar properties. The thermal analysis, optical and electric properties of [(R)-C5H14N2]PdCl4 (1) compound have been studied. The title compound [(R)-C5H14N2]PdCl4 (1) reveals thermal stability up to ca. 450 K. Besides, [(R)-C5H14N2]PdC(l)4 (1) shows semi-conducting behavior with an optical band gap of similar to 3.64 eV. The electric properties are investigated and the equivalent circuit is chosen and confirms the contribution of the grain and grain boundaries. The values of AC conductivities (10(-6) Omega(-1)cm(-1)) confirm the gap energy and the semiconducting character of the R enantiomer. The value of activation energy is determinated and shows the ionic conduction type. Such a chiral hybrid metal halide offers a viable strategy for the targeted design and synthesis of non-centrosymmetric metal halide materials for optoelectronic applications

Genetic diversity and population structure of Zymoseptoria tritici on bread wheat in Tunisia using SSR markers

Septoria tritici blotch (STB) caused by Zymoseptoria tritici is the primary biotic stress for durum wheat production in Tunisia. The present study was aimed to decipher the genetic diversity and population structure of Z. tritici bread wheat isolates; in the northern regions of Tunisia this pathogen infected exclusively bread wheat. A total of 162 single-spore isolates were sampled during the 2015–2016 growing season from nine naturally infected bread wheat fields at four locations in the three main wheat-growing regions in Tunisia, previously reported as hot spots for Septoria disease (Cap Bon, Bizerte, and Beja). Collected isolates were fingerprinted using twelve polymorphic microsatellite markers to assess the genetic diversity and population structure of Z. tritici. All the microsatellite loci were polymorphic and a high genetic diversity was observed within the whole population. The highest Nei’s index value (0.42), Shannon Index (0.84) and private allele numbers (36) were found at the El Haouaria location (Cap Bon region). Furthermore, a moderate genetic differentiation within and among the surveyed locations (73% and 27%) was confirmed by analysis of molecular variance (AMOVA). On the other hand, the STRUCTURE program was shown to be less sensitive in revealing genetic structure especially at low levels of diversity. Thus, information on the genetic structure of the pathogen population collected from bread wheat is useful for designing and implementing durable and effective management strategies

Genetic diversity and population structure of Zymoseptoria tritici on bread wheat in Tunisia using SSR markers

Septoria tritici blotch (STB) caused by Zymoseptoria tritici is the primary biotic stress for durum wheat production in Tunisia. The present study was aimed to decipher the genetic diversity and population structure of Z. tritici bread wheat isolates; in the northern regions of Tunisia this pathogen infected exclusively bread wheat. A total of 162 single-spore isolates were sampled during the 2015–2016 growing season from nine naturally infected bread wheat fields at four locations in the three main wheat-growing regions in Tunisia, previously reported as hot spots for Septoria disease (Cap Bon, Bizerte, and Beja). Collected isolates were fingerprinted using twelve polymorphic microsatellite markers to assess the genetic diversity and population structure of Z. tritici. All the microsatellite loci were polymorphic and a high genetic diversity was observed within the whole population. The highest Nei’s index value (0.42), Shannon Index (0.84) and private allele numbers (36) were found at the El Haouaria location (Cap Bon region). Furthermore, a moderate genetic differentiation within and among the surveyed locations (73% and 27%) was confirmed by analysis of molecular variance (AMOVA). On the other hand, the STRUCTURE program was shown to be less sensitive in revealing genetic structure especially at low levels of diversity. Thus, information on the genetic structure of the pathogen population collected from bread wheat is useful for designing and implementing durable and effective management strategies