Tag: M.W=100-200

Zhang, Liyuan; Yu, Runzhong; Yu, Yingbo published the article 《Analysis of metabolites and metabolic mechanism in Bt transgenic and non-transgenic maize》. Keywords: metabolite metabolic mechanism Bt transgenic maize.They researched the compound: cis-4-Aminocyclohexane carboxylic acid( cas:3685-23-2 ).Reference of cis-4-Aminocyclohexane carboxylic acid. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:3685-23-2) here.

The gas chromatog.-mass spectrometry was used to isolate and identify metabolites of non-transgenic and Bacillus thuringiensis transgenic maize. The non-targeted metabolomics technique was used to anal. the metabolic pathway and mechanism of two kinds of maize. The methanol was used as extractant and the N,O-bis(trimethylsilyl) trifluoroacetamide was used as derivatization reagent. 38 kinds of metabolites were isolated and identified from non-transgenic maize, and 61 kinds of metabolites were isolated and identified in Bacillus thuringiensis transgenic maize. The specific metabolites between non-transgenic and Bacillus thuringiensis transgenic maize were analyzed. The metabolic pathway of specific metabolites was analyzed by KEGG annotation. The metabolic mechanism of non-transgenic maize and Bacillus thuringiensis transgenic maize was explored. The result indicated there were more metabolites involved in metabolic pathways in Bacillus thuringiensis transgenic maize than in non-transgenic maize, and tricarboxylic acid cycle and energy metabolism pathways of Bacillus thuringiensis transgenic maize are found to be higher than that of non-transgenic maize. The metabolic pathway of Bacillus thuringiensis transgenic maize conforms to the biol. activity law.

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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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3685-23-2, is researched, SMILESS is N[C@H]1CC[C@H](CC1)C(O)=O, Molecular C7H13NO2Journal, Article, Research Support, U.S. Gov’t, Non-P.H.S., Brain Research called Effects of some conformationally restricted GABA analogs on GABA membrane binding and nerve ending transport, Author is Hitzemann, Robert J.; Loh, Horace H., the main research direction is GABA transport brain; receptor GABA brain membrane.Computed Properties of C7H13NO2.

By using a series of aminocyclopentane- and aminocyclohexanecarboxylic acids, as well as some naturally occurring amino acids, it was possible to determine some aspects of the spatial topog. of the GABA [56-12-2] membrane binding and transport sites in the rat brain. The Na-independent GABA binding site had a different spatial topog. than the Na-dependent binding site in that (±)-trans-3-aminocyclopentanecarboxylic acid (I) [19297-28-0] was 7-fold more potent than (±)-cis-3-aminocyclopentanecarboxylic acid (II) [49805-32-5] in inhibiting Na-independent binding, but only 1.6 times more potent in inhibiting Na-dependent binding. The nerve ending GABA transport site was similar to the Na-dependent GABA binding site in that it accommodated both I and II. However, the transport site differed from the binding site in that II was a potent inhibitor of transport but a weak inhibitor of binding. In addition to the differences in spatial characteristics, differences in the subcellular distribution of Na-independent and Na-dependent binding sites were observed The former were found primarily in the nerve ending-mitochondrial fraction, whereas the latter were primarily found in the microsomal fraction.

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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

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Synthesis and antitumor activity of nonsymmetric phosphoric acid triamides, the main research direction is phosphoric acid triamide nonsym preparation acute toxicity antitumor activity; amide phosphoric acid nonsym preparation acute toxicity antitumor activity.Recommanded Product: cis-4-Aminocyclohexane carboxylic acid.

R1R2P(O)NHR3 (R1, R2 independently = aziridino, N(CH2CH2Cl)2, NMe2, morpholino or NHCH2CH2OH; R3 = 4-R-substituted cyclohexyl (R = H, cis- and trans-CO2H, cis- and trans-CO2Et)) were prepared and tested for acute toxicity and antitumor activity. All the 12 tested compounds possess a lower antitumor activity as compared to that of the reference drug thiophosphamide. The antitumor activity of nonsym. phosphoric acid triamides is determined for the most part by the nature of amide residues attached at the P atom. The antitumor effect can be varied within a broad range by changing this residue, the maximum antitumor activity being inherent in nonsym. triamides containing the ethylenimine residue.

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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

Computed Properties of C6Cl2N4. 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 Preparation of magnesium azaphthalocyanines by cyclotetramerization of S-substituted 4,5-disulfanylpyrazine-2,3-dicarbonitriles. Author is Mrkved, Eva H.; Holmaas, Lars T.; Kjsen, Helge; Hvistendahl, Georg.

Four novel S-substituted 4,5-disulfanylpyrazine-2,3-dicarbonitriles were obtained in a multistep synthesis from diaminomaleonitrile. Two of these dicarbonitriles, with Et or benzyl S-substituents, give pure Mg azaphthalocyanines in good yields when reacted with Mg propoxide in PrOH and dioxane. Aromatic S-substituents are less stable during the reaction conditions used for cyclizations, and product mixtures were obtained.

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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

Isoda, Kyosuke; Takahashi, Hinako; Mutoh, Yuichiro; Hoshino, Norihisa; Akutagawa, Tomoyuki published the article 《One-dimensional single-helix coordination polymer self-assembled by a crown-ether appended-N-heteroacene radical anion》. Keywords: heteroacene crown ether radical anion preparation crystal mol structure; dicyanopentaoxacyclopentadecinopyrazinoquinoxaline preparation crystal mol structure reaction alkali tetraphenylborate.They researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).HPLC of Formula: 56413-95-7. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:56413-95-7) here.

A crown-ether appended N-heteroacene 1 was reduced in the presence of NaBPh4 to the radical anion 2 by accepting one electron transferred from both the cathode and BPh4- as a reductant. The obtained radical anion 2 can function as a radical anion ligand to bridge two sodium ions to self-assemble into one-dimensional helical coordination polymers.

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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

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; Reimerova, Petra; Svec, Jan; Suchan, Daniel; Miletin, Miroslav; Rhoda, Hannah M.; Nemykin, Victor N.; Zimcik, Petr researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).Computed Properties of C6Cl2N4.They published the article 《Systematic investigation of phthalocyanines, naphthalocyanines, and their aza-analogues. Effect of the isosteric aza-replacement in the core》 about this compound( cas:56413-95-7 ) in Dalton Transactions. Keywords: zinc phthalocyanine naphthalocyanine complex preparation fluorescence DFT calculation electrochem. We’ll tell you more about this compound (cas:56413-95-7).

Zinc complexes of phthalocyanine, naphthalocyanine and their aza-analogs with alkylsulfanyl substituents were synthesized and characterized by UV-visible and MCD spectroscopy, and their redox properties were investigated using CV, DPV, and SWV approaches as well as spectroelectrochem. methods. Aggregation, photostability, singlet oxygen production, and fluorescence quantum yields of the target complexes were studied as a function of the stepwise substitution of the aromatic C-H fragments by nitrogen atoms. The electronic structure and vertical excitation energies of the target compounds were probed by DFT-PCM and TDDFT-PCM approaches. Introduction of addnl. nitrogens into the structure leads to a hypsochromic shift of the Q-band and makes the macrocycle strongly electron deficient and more photostable. The impact on the photophysics is limited. The relations between the type of macrocycle and the studied properties were defined.

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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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile(SMILESS: N#CC1=NC(Cl)=C(Cl)N=C1C#N,cas:56413-95-7) is researched.Application In Synthesis of 5,6-Dihydro-2H-pyran-2-one. The article 《Cationic azaphthalocyanines bearing aliphatic tertiary amino substituents-Synthesis, singlet oxygen production and spectroscopic studies》 in relation to this compound, is published in Journal of Photochemistry and Photobiology, A: Chemistry. Let’s take a look at the latest research on this compound (cas:56413-95-7).

New cationic zinc azaphthalocyanines (AzaPc) were prepared using a statistical method of synthesis starting from 5,6-bis(2-diethylaminoethylsulfanyl)pyrazine-2,3-dicarbonitrile (A) and 5,6-bis(tert-butylsulfanyl)pyrazine-2,3-dicarbonitrile (B). All the six possible AzaPc derivatives were detected on TLC but only five of them were finally isolated using column chromatog. on silica (excluding AAAB type). The adjacent (AABB) and opposite (ABAB) isomers were well separated Singlet oxygen quantum yields (ΦΔ) were measured using the DPBF decomposition method. Values of ΦΔ in anhydrous DMF drastically decrease with the number of amino groups from 0.66 for BBBB type to 0.04 for AAAA type. The same dependence was observed in anhydrous DMF for the corresponding hydrochlorides. When DMF/water 95:5 added with HCl was used, the ΦΔ values for amino AzaPc increased to approx. 0.66. This suggests that solvation of the amino and Cl- ions plays an important role in the separation of the AzaPc mols. although no changes were found in UV-vis spectra. At least eight cationic charges are necessary for complete monomerization of AzaPc in water. Fewer charges lead to significant decrease of the absorption in the area of the Q-band and to pronounced dimeric character of the absorption spectrum.

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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

Formula: C6Cl2N4. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Syntheses and spectral properties of 2,3,7,8-tetracyano-5,10-dihydrodipyrazino[2,3-b:2′,3′-e]pyrazine. Author is Jaung, Jae-yun; Fukunishi, Koushi; Matsuoka, Masaru.

Base catalyzed intermol. cyclization of 2-amino-3-chloro-5,6-dicyanopyrazines I (R = H, Me, Ph, 4-BuC6H4, etc.) gave 5,10-disubstituted-2,3,7,8-tetracyano-5,10-dihydrodipyrazino[2,3-b:2′,3′ -e]pyrazines II. These compounds have rather small mol. size but have strong intramol. charge-transfer chromophoric system. They have strong fluorescence in solution and some have fluorescence even in the solid state which are very important to evaluate their electroluminescence property as an emitter for electroluminescence devices. The phys., structural, and electronic properties of these new 2,3,7,8-tetracyano-5,10-dihydrodipyrazino[2,3-b:2’3′-e]pyrazines were studied using UV-visible spectroscopy and the PPP MO calculation method.

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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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 56413-95-7, is researched, SMILESS is N#CC1=NC(Cl)=C(Cl)N=C1C#N, Molecular C6Cl2N4Journal, Polyhedron called Synthesis and characterization of copper complexes with the 2,3-dicyano-5,6-dimercaptopyrazine ligand: Magnetic properties of a ferrocenium salt, Author is Belo, D.; Figueira, M. J.; Santos, I. C.; Gama, V.; Pereira, L. C.; Henriques, R. T.; Almeida, M., the main research direction is copper mercaptopyrazine cyano complex preparation structure; crystal structure copper mercaptopyrazine cyano complex; antiferromagnetic interaction copper mercaptopyrazine cyano complex.COA of Formula: C6Cl2N4.

(Bu4N)2[Cu(dcdmp)2], Bu4N[Cu(dcdmp)2] and [FeCp*2]2[Cu(dcdmp)2] (H2dcdmp = 2,3-dicyano-5,6-dimercaptopyrazine; Cp* = decamethylferrocenium) were obtained and characterized. (Bu4N)2Cu(Hdcdmp)2 crystallizes in the triclinic system, space group P1̅, Z = 1, with a 9.9512(6), b 10.541(1), c 13.221(1) Å, α 69.756(9), β 88.112(6) and γ 79.658(7)°. Its crystal structure consists of layers of well isolated square planar Cu(dcdmp)22- anions alternating with layers of Bu4N+ cations along b + c, and the magnetic properties in the range 2-300 K are close to those of an ideal paramagnet with an effective magnetic moment of 1.7 μB/f.u. Bu4N[Cu(dcdmp)2] crystallizes in the monoclinic space group C2/c, Z = 8, with a 35.281(4), b 9.501(1), c 21.885(2) Å and β 109.842(9)°, being isostructural with the Au analog previously described. [Fe(Cp*)2]2[Cu(dcdmp)2] crystallizes in the monoclinic system, space group C2/c, Z = 4, with a 15.891(1), b 10.5133(7), c 30.264(3) Å and β 91.105(2)°. Its crystal structure consists of out-of-registry columns, parallel to b, of alternated dianions and side-by-side pairs of cations, …A2-(D+D+)A2-(D+D+). This compound behaves as a paramagnet with weak antiferromagnetic interactions and no ordering down to 1.7 K. The magnetic properties, due to both cation and anion S = 1/2 contributions, show a large anisotropy, ascribed essentially to the g-factor anisotropy of the Fe(Cp*)2cations.

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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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 56413-95-7, is researched, SMILESS is N#CC1=NC(Cl)=C(Cl)N=C1C#N, Molecular C6Cl2N4Journal, Dyes and Pigments called Crystalline salts of the ring-reduced tin(IV) dichloride hexadecachlorophthalocyanine and octachloro- and octacyanotetrapyrazinoporphyrazine macrocycles with strong electron-withdrawing ability, Author is Faraonov, Maxim A.; Romanenko, Nikita R.; Kuzmin, Alexey V.; Konarev, Dmitri V.; Khasanov, Salavat S.; Lyubovskaya, Rimma N., the main research direction is tin dichloride hexadecachlorophthalocyanine octachlorotetrapyrazinoporphyrazine octacyanotetrapyrazinoporphyrazine fullerene cryptand macrocycle preparation; crystal mol structure tin hexadecachlorophthalocyanine octachlorotetrapyrazinoporphyrazine octacyanotetrapyrazinoporphyrazine metallomacrocycle.Related Products of 56413-95-7.

Substituted tin(IV) dichloride phthalocyanine and tetrapyrazinoporphyrazines with acceptor chloro- or cyano-substituents: SnIVCl2(PcCl16), SnIVCl2(TPyzPzCl8) and SnIVCl2{TPyzPz(CN)8}, where PcCl16 = hexadecachlorophthalocyanine; TPyzPz(CN)8 = octacyanotetrapyrazinoporphyrazine, TPyzPzCl8 = octachlorotetrapyrazinoporphyrazine were synthesized. The reduction of these metallomacrocycles by fullerene {cryptand(Na+)}(C•-60) salt (1, 3 and 4) or potassium graphite (KC8) in the presence of cryptand (2) yields crystalline anionic salts: {cryptand(Na+)}2[SnIVCl2(PcCl4-16)]2-·C6H4Cl2 (1), {cryptand(K+)}2[{SnII(PcCl4-16)}0.926{SnIVCl2(PcCl4-16)}0.074]2-·2C6H4Cl2 (2), {cryptand(Na+)}[SnIVCl2{TPyzPz(CN)•3-8}]•-·C6H4Cl2 (3) and {cryptand(Na+)}2[SnIVCl2(TPyzPzCl4-8)]2-·2C6H4Cl2 (4). Reduction of SnIVCl2(macrocycle2-) with dianion macrocycles is accompanied by the formation of radical trianion or tetraanion macrocycles in 1-4. As stronger reductant, KC8 reduces the macrocycle and in addition nearly complete metal centered reduction from tin(IV) to tin(II) took place. Strong blue shift of the Q-band and new absorption bands are observed in the NIR range in the spectra of 1-4. Partial disruption of macrocycle aromaticity and alternation of the C – Nmeso bonds were found for the reduced macrocycles. Macrocycles are planar, and SnIV atoms are positioned exactly in the macrocycle plane. The only exception is strong distortion of the PcCl16 macrocycle in SnII(PcCl4-16) (2). Structures of 1-4 contain layers from the macrocycles having the side-by-side contacts in 1, 2, 4 and separated by cationic layers. Salt 3 presents the first structure of the TPyzPz(CN)8 macrocycle with strongest acceptor properties among known porphyrins and porphyrazines. It was shown that tetraanion macrocycles are diamagnetic in 1, 2 and 4. The [SnIVCl2{TPyzPz(CN)8•3-}]•- radical anions are paramagnetic in 3 with effective magnetic moment of 1.64μB, and salt 3 shows moderate antiferromagnetic coupling of spins with Weiss temperature of -14 K.

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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