Category: 56413-95-7

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Novakova, Veronika; Laskova, Miroslava; Vavrickova, Hana; Zimcik, Petr researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).Reference of 5,6-Dichloropyrazine-2,3-dicarbonitrile.They published the article 《Phenol-Substituted Tetrapyrazinoporphyrazines: pH-Dependent Fluorescence in Basic Media》 about this compound( cas:56413-95-7 ) in Chemistry – A European Journal. Keywords: zinc phenol substituted tetrapyrazinoporphyrazine preparation pH dependent fluorescence; phenol deprotonation switching off red fluorescence tetrapyrazinoporphyrazine solution microemulsion; azaphthalocyanines; fluorescence; intramolecular charge transfer; pH sensors; phthalocyanines. We’ll tell you more about this compound (cas:56413-95-7).

Tetrapyrazinoporphyrazines (TPyzPzs) bearing one, two, four or eight 3,5-di(tert-butyl)-4-hydroxyphenol moieties were synthesized as Zn(II) complexes and metal-free derivatives The deprotonation of the phenol using Bu4NOH induced the formation of a strong donor for intramol. charge transfer that switched OFF the red fluorescence (λF∼660 nm) of the parent Zn TPyzPzs. The changes were fully reversible for TPyzPzs with one to four phenolic moieties, and an irreversible modification was observed for TPyzPzs substituted with eight phenols. The sensors were anchored to lipophilic particles in H2O, and a pKa ∼12.5-12.7 was determined for the phenolic hydroxyl based on fluorescence changes in different buffers. A novel concept for fluorescence OFF-ON-OFF switching in metal-free TPyzPzs bearing phenolic moieties upon addition of specific amounts of base was demonstrated.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Syntheses and spectral properties of new dicyanopyrazine-related heterocycles from diaminomaleonitrile, published in 1998, which mentions a compound: 56413-95-7, mainly applied to dicyanopyrazine precursor fluorescent dye synthesis; quinoxaline dye preparation dicyanopyrazine precursor; furopyrazine dye preparation dicyanopyrazine precursor; pyrrolopyrazine dye preparation dicyanopyrazine precursor; pyrazinoporphyrazine dye preparation dicyanopyrazine precursor, Recommanded Product: 56413-95-7.

New dicyanopyrazine-related heterocycles such as quinoxalines, furopyrazines, pyrrolopyrazines, and pyrazinoporphyrazines were synthesized and their absorption and fluorescence spectra were correlated with their structures.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Stable and Easily Accessible Functional Dyes: Dihydrotetraazaanthracenes as Versatile Precursors for Higher Acenes.Recommanded Product: 5,6-Dichloropyrazine-2,3-dicarbonitrile.

A series of new dihydrotetraazaanthracenes and one new dihydrotetraazatetracene as substances for applications in organoelectronic devices and as suitable building blocks for higher azaacenes was synthesized. The condensation of aromatic diamines with dichlorodicyanopyrazine led to these tricyclic/tetracyclic compounds Syntheses of N-substituted phenylenediamines were developed to enable the introduction of multiple functional groups such as ester, amino, or nitro groups on the chromophoric system. Relationships between the structure and the spectroscopic properties could be derived from UV/Vis absorption and fluorescence spectroscopy, and by DFT and TD-DFT calculations of mol. and aggregate structures. The absorption spectra are dominated by π-π* transitions of the single mols., whereas aggregation needs to be taken into account to obtain reasonable agreement between theory and experiment in certain cases. Single-crystal x-ray analyses were carried out to examine the morphol. and solid packing effects. Finally, a dihydrotetraazaanthracene was used as a building-block to create a mesoionic octaazapentacene.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about The synthesis, photochemical and photophysical properties of zinc aryloxy- and alkyloxyazaphthalocyanines. Author is Novakova, Veronika; Zimcik, Petr; Miletin, Miroslav; Vujtech, Petr; Franzova, Sarka.

Octasubstituted zinc tetrapyrazinoporphyrazines bearing butoxy, octyloxy, 2,6-diisopropylphenoxy and 4-(hydroxymethyl)phenoxy substituents were synthesized from the corresponding 5,6-disubstituted pyrazine-2,3-dicarbonitriles using Zn(quinoline)2Cl2 in yields varying from 14 to 44%. The reaction procedure proved to be efficient for the synthesis of both alkyloxy- and aryloxy- substituted zinc tetrapyrazinoporphyrazines and did not require strictly anhydrous conditions. Optimal cyclotetramerization conditions were identified for each derivative, in terms of reaction temperature, as overheating cleaved the ether bond leaving a vacant OH group on the macrocycle. The photochem. and photophys. properties of the synthesized compounds were investigated in pyridine. Singlet oxygen quantum yields (Φ Δ) ranged from 0.49 to 0.61 and high fluorescence quantum yields (Φ F) of ∼0.30 were observed for non-aggregated compounds

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Nakamura, Akira; Ikeda, Osamu; Segawa, Hirozo; Takeuchi, Yasutomo; Takematsu, Tetsuo published an article about the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7,SMILESS:N#CC1=NC(Cl)=C(Cl)N=C1C#N ).Electric Literature of C6Cl2N4. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:56413-95-7) through the article.

The herbicidal activities of 6-substituted 2,3-dicyano-5-chloropyrazines were evaluated and correlated with the previously reported substituent parameters π (hydrophobicity) and σp (Hansch, A., et al., 1973). Parameters π and π2 indicate that the hydrophobicity of the mol. is involved in the translocation of these compounds to the target site. The activity decreases with increasing electron-withdrawing property of the 6-substituent. The herbicidal activity varied parabolically with the change in π.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Product Details of 56413-95-7. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor. Author is Lochman, Lukas; Svec, Jan; Roh, Jaroslav; Kirakci, Kaplan; Lang, Kamil; Zimcik, Petr; Novakova, Veronika.

A series of zinc azaphthalocyanines with two azacrowns in a rigid tweezer arrangement were prepared and the fluorescence sensing properties were studied. The size-driven recognition of alkali and alk. earth metal cations was significantly enhanced by the close cooperation of the two azacrown units, in which both donor nitrogen atoms need to be involved in analyte binding to switch the sensor on. The mono- or biphasic character of the binding isotherms, together with the binding stoichiometry and magnitude of association constants (KA), indicated specific complexation of particular analytes. Water solvation was shown to play an important role and resulted in a strong quenching of sensor fluorescence in the ON state. The lead compound was embedded into silica nanoparticles and advantageous sensing properties towards K+ were demonstrated in water (λF = 671 nm, apparent KA = 82 M-1, increase of 17×), even in the presence of (supra)physiol. concentrations of Na+ and Ca2+.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

COA of Formula: C6Cl2N4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about The role of the size of aza-crown recognition moiety in azaphthalocyanine fluorescence sensors for alkali and alkaline earth metal cations.

A series of fluorescence sensors bearing one 1-aza-12-crown-4, 1-aza-15-crown-5, 1-aza-18-crown-6 or 1-aza-21-crown-7 as a recognition moiety and an aza-analog of phthalocyanine as a fluorophore was prepared All compounds absorbed and emitted light in the red region. Sensing properties based on intramol. charge transfer were studied via absorption and fluorescence titration experiments with alkali metal cations and alk. earth metal cations. Important relationships between aza-crown size and binding affinity were observed in the group of alkali metal cations. Affinity for lithium decreased in series from the smallest crown to the largest, 1-aza-15-crown-5 bound sodium and potassium similarly, and 1-aza-18-crown-6 had the highest affinity to potassium. Alk. earth metal cations were bound more tightly, which was obvious from more pronounced changes in the absorption spectra, and from the higher increase of fluorescence upon cation addition A limited size preference was observed in the group of alk. earth metal cations.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Synthetic Route of C6Cl2N4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Studies on herbicidal 2,3-dicyanopyrazines. Part II. Structure-activity relationships of herbicidal 5-ethylamino- and 5-propylamino-2,3-dicyanopyrazines. Author is Nakamura, Akira; Ataka, Toshiei; Segawa, Hirozo; Takeuchi, Yasutomo; Takematsu, Tetsuo.

Sixty-eight 6-substituted 5-ethylamino- and 5-propylamino-2,3-dicyanopyrazines were synthesized and their herbicidal activities against barnyard grass (Echinochloa crus-galii) were measured in pot tests. The most active compound was 2,3-dicyano-5-propylamino-6-(m-chlorophenyl)pyrazine  [72113-45-2]. The activities of the 2 series of compounds were analyzed quant. using the hydrophobic and steric parameters of substituents at the 6-position of the pyrazine ring and an indicator variable.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Application In Synthesis of 5,6-Dichloropyrazine-2,3-dicarbonitrile. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Dicyanopyrazine studies. part IV: syntheses and solid state absorption spectra of new dicyanopyrazine dyes derived from dichlorodicyanopyrazine and Fischer’s type bases.

2-Chloro-5,6-dicyano-3-[2-(1,3,3-trimethylindolinylidene)methyl]pyrazine showed large differences in λmax from solution to the solid state resulting from strong intermol. π-π interactions. Related derivatives were synthesized by the nucleophilic substitution of 2,3-dichloro-5,6-dicyanopyrazine with various Fischer’s base type enamines. Absorption spectra, fluorescent properties and other phys. properties were correlated with their chem. structures. The PPP MO and MOPAC approach to evaluate their absorption spectra correlate with their conformations were conducted. Good correlation between the calculated and the exptl. results were obtained. The substituent effects of dicyanopyrazines affecting their chem., electronic, and phys. properties were also studied.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

COA of Formula: C6Cl2N4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Cyclotetramerisations of sulfanyl substituted pyrazine-2,3-dicarbonitriles and phthalonitriles. Author is Morkved, Eva H.; Pedersen, Frank M.; Afseth, Nils Kr.; Kjosen, Helge.

Pyrazine-2,3-dicarbonitriles, substituted with strong to moderate electron withdrawing sulfanyl groups, have been synthesized. One of these pyrazines, substituted with two 5-methyl-1,3,4-thiadiazole-2-sulfanyl groups, has shown significant anticancer reactivity. Two phthalonitriles, substituted with thiadiazole-sulfanyl groups have been synthesized. The reagents Zn(OAc)2 and Zn(quinoline)2Cl2, dissolved in quinoline, were reacted with the above monomers to obtain zinc azaphthalocyanines and phthalocyanines. Only zinc azaphthalocyanines with moderate electron withdrawing sulfanyl groups were obtained, whereas one phthalonitrile, substituted with two 5-methyl-1,3,4-thiadiazole-2-sulfanyl groups, gave the corresponding zinc phthalocyanine. Some pyrazine-2,3-dicarbonitriles, substituted with one 2-thienyl and one sulfanyl group, gave mixtures of the corresponding zinc azaphthalocyanine constitutional isomers. New compounds were characterised by elemental anal., UV-vis, IR, 1H and 13C NMR spectroscopies.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate