Day: October 21, 2022

Heydari, Somayyeh; Habibi, Davood; Reza Faraji, Ali; Keypour, Hassan; Mahmoudabadi, Masoumeh published their research in Inorganica Chimica Acta in 2021. The article was titled 《An overview on the progress and development on the palladium catalyzed direct cyanation》.Formula: C5H6BNO2 The article contains the following contents:

The simultaneous use of the new Pd nano-catalyst as well as the three types of the N-arylsulfonyl cyanamides 4-ClC6H4N(CN)S(O)2C6H4(4-X) (X = CH3, Br, NO2) as potent reagents for the in situ generation of the pos. CN ion for the direct cyanation of phenylboronic acids ArB(OH)2 [Ar = 4-ClC6H4, pyridin-3-yl, 2-(dihydroxyboranyl)phenyl, etc.] in acetonitrile at reflux conditions has been described. The experimental part of the paper was very detailed, including the reaction process of Pyridin-3-ylboronic acid(cas: 1692-25-7Formula: C5H6BNO2)

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Formula: C5H6BNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ge, Yanning; Zhang, Dehua; Zhang, Xiaoyan; Liu, Yang; Du, Longfei; Wang, Yingying published their research in Journal of Chemical Research in 2021. The article was titled 《A new perimidine-based fluorescent turn-on chemosensor for selective detection of Cu2+ ions》.Safety of 2-(Bromomethyl)pyridine hydrobromide The article contains the following contents:

Two new mols. based on 2-(2-alkoxy-1-naphthyl)-2,3-dihydro-1h-perimidine are synthesized. The binding properties are investigated by fluorescence spectroscopy showing that one of the products (2a) can selectively bind Cu2+ with fluorescence enhancement. In the experiment, the researchers used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Safety of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Safety of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhang, Ya-Qi; Hou, Lin; Bi, Hao-Xue; Fang, Xiao-Xue; Ma, Yuan-Yuan; Han, Zhan-Gang published an article in 2021. The article was titled 《Organic moiety-regulated Photocatalytic Performance of Phosphomolybdate hybrids for hexavalent chromium reduction》, and you may find the article in Chemistry – An Asian Journal.Formula: C12H12N2 The information in the text is summarized as follows:

Visible-light-driven photocatalytic Cr(VI) reduction is a promising pathway to moderate environmental pollution, in which the development of photocatalysts is pivotal. Herein, three hourglass-type phosphomolybdate-based hybrids with the formula of: (H2bpe)3[Zn(H2PO4)][Zn(bpe)(H2O)2]H{Zn[P4Mo6O31H6]2}·6H2O (1) Na6[H2bz]2[ZnNa4(H2O)5]{Zn [P4Mo6O31H3]2}·2H2O (2) and (H2mbpy) {[Zn(mbpy)(H2O)]2[Zn(H2O)]2}{Zn[P4Mo6O31H6]2}·10H2O (3) (bpe = trans-1,2-bi(4-pyridyl)-ethylene; bz = 4,4′-diaminobiphenyl; mbpy = 4,4′-dimethyl-2,2′bipyridine) were synthesized under the guidance of the functional organic moiety modification strategy. Structural anal. showed that hybrids 1-3 have similar 2D layer-like spatial arrangements constructed by {Zn[P4Mo6]2} clusters and organic components with different conjugated degree. With excellent redox properties and wide visible-light absorption capacities, hybrids 1-3 display favorable photocatalytic activity for Cr(VI) reduction with 79%, 70% and 64% reduction rates, which are superior to that of only inorganic {Zn[P4Mo6]2} itself (21%). The investigation of organic components on photocatalytic performance of hybrids 1-3 suggested that the organic counter cations (bpe, bz and mbpy) can effectively affect the visible-light absorption, as well as the recombination of photogenerated carriers stemmed from {Zn[P4Mo6]2} clusters, further promoting their photocatalytic performances towards Cr(VI) reduction This work provides an exptl. basis for the design of functionalized photocatalysts via the modification of organic species. In the part of experimental materials, we found many familiar compounds, such as 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Formula: C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Formula: C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Jayabharathi, J.; Thilagavathy, S.; Thanikachalam, V.; Anudeebhana, J. published an article in Materials Today Chemistry. The title of the article was 《Multifunctional zig-zag-shaped D-π-A-π-D emitters with high conjugation extent for blue FOLEDs and host for PHOLEDs》.SDS of cas: 624-28-2 The author mentioned the following in the article:

We have synthesized zig-zag shaped, meta- and para-linked D-π-A-π-D blue emitters, m-BTPAPy and p-BTPAPy based on a non-sym. connection strategy of two identical π-conjugated groups. The phenanthrimidazole moiety coupled to pyridine via naphthyl spacer by para- and meta-linking modes. Both m-BTPAPy (Td/Tg, °C: 564/281) and p-BTPAPy (Td/Tg, °C: 502/246) exhibit excellent thermal stability and can form a stable amorphous film. Changing the connection strategy from para to meta mode, m-BTPAPy shows deep blue emission with CIE (0.15, 0.07). The highly twisted m-BTPAPy exhibit higher Photoluminescence quantum yield (PLQY)s/f of 0.98/0.85 than p-BTPAPy (0.95/0.80) owing to the suppression of intermol. stacking. The non-doped blue device (BOLEDs) with multifunctional m-BTPAPy/p-BTPAPy show external quantum efficiency (EQE) of 7.12/5.12% with small roll-off efficiency of 1.68/2.14%, power efficiency (PE) of 5.92/5.42 lm/W, the luminance of 58675/76234 cd/m2, and current efficiency (CE) of 6.12/5.86 cd/A. The non-doped device using m-BTPAPy/p-BTPAPy as both emitting and electron-transporting material exhibit luminance of 40671/49539 cd/m2, CE of 5.01/5.08 cd/A, PE of 4.68/4.76 lm/W, EQE of 6.12/4.81%, roll-off efficiency of 1.63/1.87%, and CIE (0.15, 0.10)/(0.15, 0.11). These bipolar materials with high triplet energy were employed as hosts in green and red PhOLEDs. The green (m-BTPAPy: Ir(ppy)3)/red device (m-BTPAPy: Ir(MDQ)2(acac)) exhibit maximum EQE of 29.85/20.09%, luminance of 79523/42412 cd/m2, CE of 78.62/27.56 cd/A, and PE of 72.36/23.86 lm/W, and CIE (0.33, 0.60)/(0.65,0.33). The experimental process involved the reaction of 2,5-Dibromopyridine(cas: 624-28-2SDS of cas: 624-28-2)

2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. SDS of cas: 624-28-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Category: pyridine-derivativesIn 2019 ,《Electrochemical and electronic properties of a series of substituted polypyridine ligands and their Co(II) complexes》 appeared in Inorganica Chimica Acta. The author of the article were Ferreira, Hendrik; Conradie, Marrigje M.; Conradie, Jeanet. The article conveys some information:

DFT calculations show that, due to Jahn-Teller distortion, the d7 [Co(N,N)3]2+ complexes, with S = 1/2 (N,N = bipyridine or substituted bipyridine ligand) have two longer axial and four shorter equatorial Co-N bonds (elongation Jahn-Teller), while [Co(terpyridine)2]2+ with S = 1/2, instead has two shorter central (axial) Co-N bonds and four longer distal Co-N bonds (compression Jahn-Teller), since in the latter, the distal Co-N bonds are more flexible than the Co-N axial bonds in the rigid structure of the tridentate terpyridine ligand. The same trend is observed for the related high spin S = 3/2 Co(II) complexes, though less pronounced. The cyclic voltammograms of [Co(terpyridine)2]2+ and a series of the [Co(N,N)3]2+ complexes show at least three chem. as well as electrochem. reversible redox couples, namely CoIII/II, CoII/I and a ligand based reduction of the polypyridine-Co(I) complex. The reduction of the uncoordinated free polypyridine ligand is more than 0.5 V more neg. than the reduction of the coordinated ligand in the polypyridine-Co(I) complex. The experimental part of the paper was very detailed, including the reaction process of 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Category: pyridine-derivatives)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Category: pyridine-derivatives Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Safety of 4,4′-Dimethyl-2,2′-bipyridineIn 2021 ,《Supramolecular photocatalysts fixed on the inside of the polypyrrole layer in dye sensitized molecular photocathodes: application to photocatalytic CO2 reduction coupled with water oxidation》 appeared in Chemical Science. The author of the article were Kuttassery, Fazalurahman; Kumagai, Hiromu; Kamata, Ryutaro; Ebato, Yusuke; Higashi, Masanobu; Suzuki, Hajime; Abe, Ryu; Ishitani, Osamu. The article conveys some information:

The development of systems for photocatalytic CO2 reduction with water as a reductant and solar light as an energy source is one of the most important milestones on the way to artificial photosynthesis. Although such reduction can be performed using dye-sensitized mol. photocathodes comprising metal complexes as redox photosensitizers and catalyst units fixed on a p-type semiconductor electrode, the performance of the corresponding photoelectrochem. cells remains low, e.g., their highest incident photon-to-current conversion efficiency (IPCE) equals 1.2%. Herein, we report a novel dye-sensitized mol. photocathode for photocatalytic CO2 reduction in water featuring a polypyrrole layer, [Ru(diimine)3]2+ as a redox photosensitizer unit, and Ru(diimine)(CO)2Cl2 as the catalyst unit and reveal that the incorporation of the polypyrrole network significantly improves reactivity and durability relative to those of previously reported dye-sensitized mol. photocathodes. The irradiation of the novel photocathode with visible light under low applied bias stably induces the photocatalytic reduction of CO2 to CO and HCOOH with high faradaic efficiency and selectivity (even in aqueous solution), and the highest IPCE is determined as 4.7%. The novel photocathode is coupled with n-type semiconductor photoanodes (CoOx/BiVO4 and RhOx/TaON) to construct full cells that photocatalytically reduce CO2 using water as the reductant upon visible light irradiation as the only energy input at zero bias. The artificial Z-scheme photoelectrochem. cell with the dye-sensitized mol. photocathode achieves the highest energy conversion efficiency of 8.3 × 10-2% under the irradiation of both electrodes with visible light, while a solar to chem. conversion efficiency of 4.2 × 10-2% is achieved for a tandem-type cell using a solar light simulator (AM 1.5, 100 mW cm-2). In the experiment, the researchers used 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Safety of 4,4′-Dimethyl-2,2′-bipyridine)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Safety of 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 4-AcetylpyridineIn 2021 ,《Palladium(II)-catalyzed three-component tandem reactions: synthesis of multiply substituted quinolines》 appeared in Organic Chemistry Frontiers. The author of the article were Zhang, Yetong; Chen, Lepeng; Shao, Yinlin; Zhang, Fangjun; Chen, Zhongyan; Lv, Ningning; Chen, Jiuxi; Li, Renhao. The article conveys some information:

The three-component tandem reaction of 2-aminobenzonitriles, arylboronic acids and ketones allowing the synthesis of polysubstituted quinolines I [R1 = H, 7-Me, 6-F, etc.; R2 = Me, Ph, 2-thienyl, etc.; R3 = Ph, 2-naphthyl, 3-thienyl, etc.; R4 = H, Et, Br, etc.; R2R4 = CH2CH2CH2; CH2(CH2)2CH2, etc.] was reported. This strategy presented a practical, efficient, one-pot procedure that delivered functional quinolines in moderate to good yields with high functional group tolerance. To enrich the synthetic applications in accessing diverse quinolines, a new method for the introduction of halogen substituents into target products was developed as well, which showed potential for further synthetic elaborations.4-Acetylpyridine(cas: 1122-54-9Application In Synthesis of 4-Acetylpyridine) was used in this study.

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Application In Synthesis of 4-Acetylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Safety of 4-CyanopyridineIn 2021 ,《Nickelocene as an Air- and Moisture-Tolerant Precatalyst in the Regioselective Synthesis of Multisubstituted Pyridines》 appeared in Journal of Organic Chemistry. The author of the article were Cho, Il Young; Kim, Woo Gyum; Jeon, Ji Hwan; Lee, Jeong Woo; Seo, Jeong Kon; Seo, Jongcheol; Hong, Sung You. The article conveys some information:

Herein, operationally simple nickel(0) catalysis to access substituted pyridines I [R = Me, Ph, 2-furyl, etc.; R1 = Me, Ph, trimethylsilyl, etc.; R2 = H, Me, Ph, etc.; Z = CH2, O, C(CO2Et)2, N-Ts] from various nitriles and 1,6-diynes without the aid of air-free techniques was reported. The Ni-Xantphos-based catalytic manifold was tolerant to air, moisture and heat while promoting the [2 + 2 + 2] cycloaddition reactions with high reaction yields and broad substrate scope. In addition, the steric effect but also the frontier MO interactions could played a critical role in determining the regiochem. outcome of nickel-catalyzed [2 + 2 + 2] cycloaddition for the synthesis of compounds I.4-Cyanopyridine(cas: 100-48-1Safety of 4-Cyanopyridine) was used in this study.

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Safety of 4-Cyanopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Computed Properties of C6H4N2In 2020 ,《Pyridine-Diketopyrrolopyrrole-Based Novel Metal-Free Visible-Light Organophotoredox Catalyst for Atom-Transfer Radical Polymerization》 appeared in Journal of Physical Chemistry A. The author of the article were Yang, Long; Huang, Yujie; Peng, Yuting; Liu, Fei; Zhang, Qingchun; He, Huichao; Wang, Jun; Jiang, Long; Zhou, Yong. The article conveys some information:

In the field of electronics, organocatalysts are in high demand for use in the synthesis of clean polymers using solar radiation rather than potentially contaminating metals. Combining theor. design, simulation, and experiments, this work presents a novel, pyridine-diketopyrrolopyrrole (P-DPP)-based metal-free visible-light organophotoredox catalyst (P-DPP). It is effective in the photocontrolled organocatalytic atom-transfer radical polymerization (O-ATRP) of Me methacrylate (MMA) and styrene. The use of this catalyst and white light-emitting diode (LED) irradiation produces polymers with a crosslinked feature. In O-ATRP, the P-DPP catalyst has an oxidative quenching catalytic mechanism with an excited-state reductive potential of -1.8 V, fluorescence lifetime of 7.5 ns, and radical-cation oxidative potential of 0.45 V. Through mol. simulation, we found that the adjacent pyridine group is key to reducing the alkyl halide initiator and generating radicals, while the diketopyrrolopyrrole core stabilizes the triplet state of the catalyst through intramol. charge transfer. The findings related to this novel photoredox catalyst will aid in the search for much more effective organophotoredox catalysts for use in controlled radical polymerization They will also be of value in the fields of polymer chem. and physics and in various applications. The experimental process involved the reaction of 4-Cyanopyridine(cas: 100-48-1Computed Properties of C6H4N2)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Computed Properties of C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of C7H7NOIn 2020 ,《Synthesis, antioxidant and antimicrobial properties of novel pyridyl-carbonyl thiazoles as dendrodoine analogs》 appeared in Turkish Journal of Chemistry. The author of the article were Sahin, Zafer; Biltekin, Sevde Nur; Yurttas, Leyla; Demirayak, Seref. The article conveys some information:

Marine compound dendrodoine was first obtained from tunicate species (Dendrodo grossularia), it has a five-membered ring, namely, it is a heterocycle thiadiazole, which is found rarely in natural sources. Following its biol. activities, novel analogs have been investigated recently. Synthesis of the analogs I (R1 = 2-pyridyl, 3-pyridyl, 4-pyridyl; R2 = pyrrolidin-1-yl, piperidin-1-yl, azepan-1-yl, etc.) for this study is realized with uncommon thiazole closure, including methylene-carbonyl condensation. As an alkaloid derivative, antioxidant properties were evaluated with DPPH and FRAP assays and antimicrobial effect with microdilution method. Among the series, few compds showed higher antioxidant activity than those having 3 or 4-pyridyl substituents. There is lesser activity for 2-pyridyl activity for 2-pyridyl containing group, which may be a result of intramol. interactions. No activity was observed against gram-neg. bacteria at 250μg/mL. Compound I (R1 = 2-pyridyl, 4-pyridyl; R2 = hexamethylamine) showed activity at 64μg/mL against S. aureus and I (R1 = 2-pyridyl; R2 = hexamethylamine) showed activity at 16μg/mL against S. epidermidis gram-pos. bacteria. Chloramphenicol showed activity against all microorganisms at 8-16μg/mL. Sixteen original dendrodoine analogs have been defined by close/higher activity compared to dendrodoine analogs and Trolox. The experimental process involved the reaction of 4-Acetylpyridine(cas: 1122-54-9Synthetic Route of C7H7NO)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Synthetic Route of C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem