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Journal articles on the topic 'Pyridyl'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Ramle, Abdul Qaiyum, Sang Loon Tan, and Edward R. T. Tiekink. "Synthesis and Crystallographic Characterisation of Pyridyl- and Indoleninyl-Substituted Pyrimido[1,2-b]Indazoles." Crystals 12, no. 9 (2022): 1283. http://dx.doi.org/10.3390/cryst12091283.

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Pyridyl- and indoleninyl-substituted pyrimido[1,2-b]indazole were synthesised in good to high yields from the condensation reaction of 1,3-dialdehydes with 3-aminoindazoles. The structural features of the compounds were determined by NMR (1H, 13C and 19F), FT-IR and HR-MS. The spectroscopic assignments were confirmed by X-ray crystallography for two derivatives, i.e., 9-Bromo-3-(pyridin-4-yl)pyrimido[1,2-b]indazole (1b) and 10-Methoxy-3-(pyridin-4-yl)pyrimido[1,2-b]indazole (1c), which further provides support for significant delocalisation of π-electron density over the entire fused ring syst

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2

Katsuta, Nagisa, Akio Mishima, Akira Fuyuhiro, Shinya Hayami та Satoshi Kawata. "Bis[μ-3,5-bis(pyridin-2-yl)-1H-pyrazole]bis[dibromidoiron(III)]". Acta Crystallographica Section E Structure Reports Online 69, № 11 (2013): m574. http://dx.doi.org/10.1107/s1600536813026573.

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The title dinuclear complex, [Fe2Br4(C13H9N4)2], which lies on an inversion center, features two approximately planar bis(pyridin-2-yl)pyrazole (bpypz−) ligands [maximum deviation = 0.082 (3) Å] and four bromide ions. Each FeIIIion is octahedrally coordinated by four N atoms of two bpypz−ligands and two Br ions. π–π stacking interactions [centroid–centroid distances = 3.7004 (17)–4.0123 (18) Å] are observed between pyridyl and pyrazole rings, and between pyridyl and pyridyl rings of adjacent complex molecules.

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3

Andersen, Heidi Gade, David Kvaskoff, and Curt Wentrup. "Bisiminopropadienes R-N=C=C=C=N-R from Pyridopyrimidines." Australian Journal of Chemistry 65, no. 6 (2012): 686. http://dx.doi.org/10.1071/ch12039.

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Chlorination of the N,N′-di(2-pyridyl)malonamide 13a affords 2-chloro-8-methyl-4-(2-(4-picolinyl)imino-4H-pyrido[1,2-a]pyrimidine 17a. Flash vacuum thermolysis of 17a causes efficient ring opening to the valence-tautomeric ketenimine 18a/19a, elimination of HCl, and formation of the bis(4-methyl-2-pyridyl)iminopropadiene, R-N=C=C=C=N-R 20a.

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4

Li, Huan Huan, Hai Bin Chu, Ying Nan Chen, et al. "Effects of Acidity on Nitrogen-Heterocyclic Compounds with Rare Earth Coordination and the Structure of Protonated Phenanthroline." Advanced Materials Research 233-235 (May 2011): 2808–11. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2808.

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2,3-bis(2-pyridyl)-5,6-dihydropyrazine and a protonated phenanthroline (Phen) have been synthesized and the structure of protonated Phen is established by X-ray diffraction single crystal structure analysis. The coordination reactions of Phen, 2,2'- bipyridine and 2,3-bis(2-pyridyl)-5,6-dihydropyrazine with rare earth ions in low pH have been studied. The results show that 2,3-bis(2-pyridyl)-5,6-dihydropyrazine is hydrolyzed to be 2,2’-pyridil and protonated ethylenediamine. Meanwhile, Phen combines with proton, which results that nitrogen atoms can not coordinate with rare earth ions. The mol

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5

Yousaf, Muhammad, Nathan J. Yutronkie, Raúl Castañeda, Jacob A. Klein, and Jaclyn Brusso. "Boratriazines: inducing luminescence through boron incorporation into a terpy-type framework." New J. Chem. 41, no. 20 (2017): 12218–24. http://dx.doi.org/10.1039/c7nj02462b.

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The synthesis and physicochemical properties of pyridyl and pyrimidyl functionalized 1,3,5,2-triazaborinines are reported, along with the Lewis acid–base adduct pyrimidine-2-carboximidamide trifluoroborane, which forms as a side product in the reaction with the pyrimidyl substituents.

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6

Reynolds, Todd M., Steven M. Berry, and Deborah C. Bebout. "Crystal structure and Hirshfeld surface analysis of {2-[bis(pyridin-2-ylmethyl)amino]ethane-1-thiolato}chloridocadmium(II)." Acta Crystallographica Section E Crystallographic Communications 80, no. 10 (2024): 1081–86. http://dx.doi.org/10.1107/s2056989024009198.

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The title compound, [Cd(C14H16N3S)Cl] or [CdLCl] (1), where LH = 2-[bis(pyridin-2-ylmethyl)amino]ethane-1-thiol, was prepared and structurally characterized. The Cd2+ complex crystallizes in P21/c with a distorted trigonal–bipyramidal metal coordination geometry. Supramolecular interactions in 1 include parallel offset face-to-face interactions between inversion-related pyridyl rings and potential hydrogen bonds with chlorine or sulfur as the acceptor. Additional cooperative pyridyl–pyridyl interactions with roughly 45° tilt angles and centroid–centroid distances of less than 5.5 Å likely also

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7

Halushchenko, Valeriia, Oleksandr Korovin, Natalya Rusakova, et al. "Crystal structure and supramolecular features of bis{ethyl 2-[1-methyl-3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl]acetate}trinitratolanthanum(III)." Acta Crystallographica Section E Crystallographic Communications 81, no. 7 (2025): 632–35. https://doi.org/10.1107/s2056989025005419.

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The title lanthanum(III) complex, [La(Et-MPTA)2(NO3)3] {where Et-MPTA is ethyl 2-[1-methyl-3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl]acetate} or [La(C24H28N8O4)(NO3)3], crystallizes in the monoclinic space group C2/c (No. 15). The lanthanum atom is twelve-coordinate, bonded to two oxygen atoms from carboxylate groups, four nitrogen atoms from two pyridinyl-1,2,4-triazole ligands, and six oxygen atoms of three NO3 − anions. The coordination geometry around the lanthanum atom can be described as a distorted icosahedron. Supramolecular features include π-stacking interactions between pyridyl and tri

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8

Tan, Sang Loon, Nathan R. Halcovitch, and Edward R. T. Tiekink. "N,N′-Bis(pyridin-4-ylmethyl)oxalamide benzene monosolvate: crystal structure, Hirshfeld surface analysis and computational study." Acta Crystallographica Section E Crystallographic Communications 75, no. 8 (2019): 1133–39. http://dx.doi.org/10.1107/s2056989019009551.

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The asymmetric unit of the title 1:1 solvate, C14H14N4O2·C6H6 [systematic name of the oxalamide molecule: N,N′-bis(pyridin-4-ylmethyl)ethanediamide], comprises a half molecule of each constituent as each is disposed about a centre of inversion. In the oxalamide molecule, the central C2N2O2 atoms are planar (r.m.s. deviation = 0.0006 Å). An intramolecular amide-N—H...O(amide) hydrogen bond is evident, which gives rise to an S(5) loop. Overall, the molecule adopts an antiperiplanar disposition of the pyridyl rings, and an orthogonal relationship is evident between the central plane and each term

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9

Laachir, Abdelhakim, Fouad Bentiss, Salaheddine Guesmi, Mohamed Saadi та Lahcen El Ammari. "Crystal structure of bis[2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole-κ2N2,N3]bis(thiocyanato-κS)copper(II)". Acta Crystallographica Section E Crystallographic Communications 72, № 8 (2016): 1176–78. http://dx.doi.org/10.1107/s2056989016011713.

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The mononuclear title complex, [Cu(SCN)2(C12H8N4S)2], was obtained by the reaction of 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole and potassium thiocyanate with copper(II) chloride dihydrate. The copper cation lies on an inversion centre and displays an elongated octahedral coordination geometry. The equatorial positions are occupied by the N atoms of two 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole ligands, whereas the axial positions are occupied by the S atoms of two thiocyanate anions. The thiadiazole and the pyridyl rings linked to the metal are approximately coplanar, with a maximum deviation fro

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10

Karthikeyan, Iyyanar, Dhanarajan Arunprasath, and Govindasamy Sekar. "An efficient synthesis of pyrido[1,2-a]indoles through aza-Nazarov type cyclization." Chemical Communications 51, no. 9 (2015): 1701–4. http://dx.doi.org/10.1039/c4cc08783f.

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Transition metal free Brønsted acid mediated synthesis of pyrido[1,2-a]indole scaffolds has been developed through aza-Nazarov type cyclization of readily available diaryl(2-pyridyl)methanol using formic acid for the synthesis of biologically and medicinally important pyrido[1,2-a]indole, indolo[1,2-a]quinoline and pyrimido[1,2-a]indole derivatives.

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11

Chernyshev, Alexander N., Vadim Yu Kukushkin, and Matti Haukka. "Two complexes of PtIVand AuIIIwith 2,2′-dipyridylamine and 2,2′-dipyridylaminide ligands." Acta Crystallographica Section C Structural Chemistry 70, no. 12 (2014): 1133–37. http://dx.doi.org/10.1107/s2053229614021548.

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Two noble metal complexes involving ancillary chloride ligands and chelating 2,2′-bipyridylamine (Hdpa) or its deprotonated derivative (dpa), namely [bis(pyridin-2-yl-κN)amine]tetrachloridoplatinum(IV), [PtCl4(C10H9N3)], and [bis(pyridin-2-yl-κN)aminido]dichloridogold(III), [AuCl2(C10H8N3)], are presented and structurally characterized. The metal atom in the former has a slightly distorted octahedral coordination environment, formed by four chloride ligands and two pyridyl N atoms of Hdpa, while the metal atom in the latter has a slightly distorted square-planar coordination environment, forme

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12

Yan, Linghao, Guowen Kuang, Qiushi Zhang, Xuesong Shang, Pei Nian Liu, and Nian Lin. "Self-assembly of a binodal metal–organic framework exhibiting a demi-regular lattice." Faraday Discussions 204 (2017): 111–21. http://dx.doi.org/10.1039/c7fd00088j.

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Designing metal–organic frameworks with new topologies is a long-standing quest because new topologies often accompany new properties and functions. Here we report that 1,3,5-tris[4-(pyridin-4-yl)phenyl]benzene molecules coordinate with Cu atoms to form a two-dimensional framework in which Cu adatoms form a nanometer-scale demi-regular lattice. The lattice is articulated by perfectly arranged twofold and threefold pyridyl–Cu coordination motifs in a ratio of 1 : 6 and features local dodecagonal symmetry. This structure is thermodynamically robust and emerges solely when the molecular density i

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13

Zhou, Wen, and Jian Wang. "A one-dimensional zinc(II) coordination polymer incorporating [1,1′-biphenyl]-4,4′-dicarboxylate andN,N′-bis(pyridin-3-ylmethyl)-[1,1′-biphenyl]-4,4′-dicarboxamide ligands." Acta Crystallographica Section C Crystal Structure Communications 69, no. 5 (2013): 486–90. http://dx.doi.org/10.1107/s0108270113008111.

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In the title compound,catena-poly[[[N,N′-bis(pyridin-3-ylmethyl)-[1,1′-biphenyl]-4,4′-dicarboxamide]chloridozinc(II)]-μ-[1,1′-biphenyl]-4,4′-dicarboxylato-[[N,N′-bis(pyridin-3-ylmethyl)-[1,1′-biphenyl]-4,4′-dicarboxamide]chloridozinc(II)]-μ-[N,N′-bis(pyridin-3-ylmethyl)-[1,1′-biphenyl]-4,4′-dicarboxamide]], [Zn2(C14H8O4)Cl2(C26H22N4O2)3]n, the ZnIIcentre is four-coordinate and approximately tetrahedral, bonding to one carboxylate O atom from a bidentate bridging dianionic [1,1′-biphenyl]-4,4′-dicarboxylate ligand, to two pyridine N atoms from twoN,N′-bis(pyridin-3-ylmethyl)-[1,1′-biphenyl]-4,4

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14

Frey, Steven T., Hillary A. Ramirez, Manpreet Kaur, and Jerry P. Jasinski. "Crystal structure of a seven-coordinate manganese(II) complex with tris(pyridin-2-ylmethyl)amine (TMPA)." Acta Crystallographica Section E Crystallographic Communications 74, no. 8 (2018): 1075–78. http://dx.doi.org/10.1107/s2056989018009611.

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Structural analysis of (acetato-κ2 O,O′)(methanol-κO)[tris(pyridin-2-ylmethyl)amine-κ4 N,N′,N′′,N′′′]manganese(II) tetraphenylborate, [Mn(C2H3O2)(C18H18N4)(CH3OH)](C24H20B) or [Mn(TMPA)(Ac)(CH3OH)]BPh4 [TMPA = tris(pyridin-2-ylmethyl)amine, Ac = acetate, BPh4 = tetraphenylborate] by single-crystal X-ray diffraction reveals a complex cation with tetradentate coordination of the tripodal TMPA ligand, bidentate coordination of the Ac ligand and monodentate coordination of the methanol ligand to a single MnII center, balanced in charge by the presence of a tetraphenylborate anion. The MnII complex

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15

Priya, K. Kavitha, and V. Anuradha. "A Novel Pyridyl Ester Isolated from Leucas cephalotes." Asian Journal of Chemistry 31, no. 10 (2019): 2410–12. http://dx.doi.org/10.14233/ajchem.2019.22226.

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From the flowers of Leucas cephalotes, pyridine-3-carboxylic acid ester was isolated. Its structure was established as 2′,5′-dihydroxy-3′-pyridyl-(2,5-dihydroxy)pyridinyl-3-carboxylate on the basis of spectroscopic analysis. To out best of knowledge, this is the first report from Leucas cephalotes in particular and Labiatae family in general.

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16

Saraswatula, Viswanadha G., Mukhtar A. Bhat, Pradeep Kumar Gurunathan, and Binoy K. Saha. "Comparison of pyridyl and pyridyl N-oxide groups as acceptor in hydrogen bonding with carboxylic acid." CrystEngComm 16, no. 22 (2014): 4715–21. http://dx.doi.org/10.1039/c3ce42449a.

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The propensity of carboxyl⋯pyridyl synthon is more than carboxyl⋯pyridyl N-oxide synthon, but carboxyl⋯pyridyl N-oxide synthon forms shorter hydrogen bond than carboxyl⋯pyridyl synthon. Carboxyl⋯pyridyl N-oxide synthon containing systems might show better solubility than the corresponding carboxyl⋯pyridyl synthon containing systems.

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17

Zingales, Sarah K., Morgan E. Moore, Andrew D. Goetz, and Clifford W. Padgett. "Crystal structure of (E)-2-[(2-bromopyridin-3-yl)methylidene]-6-methoxy-3,4-dihydronaphthalen-1(2H)-one and 3-[(E)-(6-methoxy-1-oxo-1,2,3,4-tetrahydronaphthalen-2-ylidene)methyl]pyridin-2(1H)-one." Acta Crystallographica Section E Crystallographic Communications 72, no. 7 (2016): 955–58. http://dx.doi.org/10.1107/s2056989016009300.

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The title compounds C17H14BrNO2, (I), and C17H15NO3, (II), were obtained from the reaction of 6-methoxy-3,4-dihydro-2H-naphthalen-1-one and 2-bromonicotinaldehyde in ethanol. Compound (I) was the expected product and compound (II) was the oxidation product from air exposure. In the crystal structure of compound (I), there are no short contacts or hydrogen bonds. The structure does display π–π interactions between adjacent benzene rings and adjacent pyridyl rings. Compound (II) contains two independent molecules,AandB, in the asymmetric unit; both are non-planar, the dihedral angles between the

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18

Twaróg, Kamil, Małgorzata Hołyńska, and Andrzej Kochel. "A new photoluminescent coordination polymer constructed with an N-donor ligand having extended coordination capabilities derived from quinoline and pyridine." Acta Crystallographica Section C Structural Chemistry 76, no. 5 (2020): 500–506. http://dx.doi.org/10.1107/s2053229620004593.

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Employment of the organic 2-(pyridin-4-yl)quinoline-4-carboxylic acid ligand with extended coordination capabilities leads to the formation of the one-dimensional copper(II) coordination polymer catena-poly[[diaquacopper(II)]-bis[μ-2-(pyridin-4-yl)quinoline-4-carboxylato]-κ2 N 2:O;κ2 O:N], {[Cu(C15H9N2O2)2(H2O)2]·2H2O} n , under hydrothermal conditions. The ligand, isolated as its hydrochloride salt, namely, 4-(4-carboxyquinolin-2-yl)pyridinium chloride monohydrate, C15H11N2O2 +·Cl−·H2O, reveals a pseudosymmetry element (translation a/2) in its crystal structure. The additional pyridyl N atom,

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19

Lesina, Yulia, Perizat Beysembay, and Assiya Kassanova. "One-Pot Synthesis of Chloropyridines from Aminopyridines via Diazotization." Key Engineering Materials 712 (September 2016): 273–76. http://dx.doi.org/10.4028/www.scientific.net/kem.712.273.

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A method for synthesis of chloropyridines from pyridinyl trifluoromethanesulfonates in acetonitrile in the presence of hydrochloric acid was developed. One-pot synthesis of chloropyridines from aminopyridines via diazotization was presented. Pyridyl triflates were obtained in this reaction in situ. This method provides good yields of the target products.

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20

Bentiss, Fouad, Moha Outirite, Michel Lagrenée, Mohamed Saadi та Lahcen El Ammari. "Aquabis[2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole-κ2N2,N3](trifluoromethanesulfonato-κO)copper(II) trifluoromethanesulfonate". Acta Crystallographica Section E Structure Reports Online 68, № 4 (2012): m360—m361. http://dx.doi.org/10.1107/s1600536812008732.

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2,5-Bis(pyridin-2-yl)-1,3,4-thiadiazole (denotedL) has been found to act as a bidentate ligand in the monomeric title complex, [Cu(CF3O3S)(C12H8N4S)2(H2O)](CF3O3S). The complex shows a distorted octahedrally coordinated copper(II) cation which is linked to two thiadiazole ligands, one water molecule and one trifluoromethanesulfonate anion. The second trifluoromethanesulfonate anion does not coordinate the copper(II) cation. Each thiadiazole ligand uses one pyridyl and one thiadiazole N atom for the coordination of copper. The N atom of the second non-coordinating pyridyl substituent is found o

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21

Bobadova-Parvanova, Petia, Dylan Goliber, Elijuah Hernandez, Daniel LaMaster, and Maria da Graça H. Vicente. "Substituent Effects on the Photophysical Properties of a Series of 8(meso)-Pyridyl-BODIPYs: A Computational Analysis of the Experimental Data." Physchem 4, no. 4 (2024): 483–94. https://doi.org/10.3390/physchem4040034.

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Recently, a series of 8(meso)-pyridyl-BODIPYs (2-pyridyl, 3-pyridyl, and 4-pyridyl) and their 2,6-substituted derivatives were synthesized and their structure and photophysical properties were studied both experimentally and computationally. One of the main observed trends was that the 2-pyridyl-BODIPYs were consistently less fluorescent than their 3-pyridyl and 4-pyridyl analogs, regardless of the 2,6-substituents. Herein, we extend our previous computational studies and model not only the ground but also the excited states of the entire series of previously synthesized meso-pyridyl-BODIPYs w

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22

Oae, Shigeru, Takeshi Takeda, Junichi Uenishi, and Shoji Wakabayashi. "LIGAND COUPLING REACTIONS OF 2-PYRIDYL, 4-PYRIDYL AND 2-PYRIMIDYL SULFOXIDES WITH GRIGNARD REAGENTS." Phosphorus, Sulfur, and Silicon and the Related Elements 115, no. 1 (1996): 179–82. http://dx.doi.org/10.1080/10426509608037965.

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23

Tomšič, Sara, Janez Košmrlj, and Andrej Pevec. "Four Different Crystalline Products from One Reaction: Unexpected Diversity of Products of the CuCl2 Reaction with N-(2-Pyridyl)thiourea." Acta Chimica Slovenica 67, no. 4 (2020): 1290–300. http://dx.doi.org/10.17344/acsi.2020.6252.

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The reaction of N-(2-pyridyl)thiourea with CuCl2 in methanol yields four different crystalline products: yellow dimeric complex, [Cu2Cl2(μ-Cl)2(L)2] (1), red polymeric complex, [Cu3Cl8L2]n (2), orange crystalline product with ionic structure, L2[CuCl4] (3), and colourless ionic compound LCl (4), where L = 2-amino-[1,2,4]thiadiazolo[2,3-a]pyridin-4-ium cation as a result of oxidative cyclization of N-(2-pyridyl)thiourea. The crystal structures of all these crystalline products have been determined by single-crystal X-ray diffraction analysis. Compound 1 involves a copper(I) ion while in 2 and 3

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24

Gould, Jamie A., Harprit Singh Athwal, Alexander J. Blake, et al. "Gas adsorption and structural diversity in a family of Cu(II) pyridyl-isophthalate metal–organic framework materials." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2084 (2017): 20160334. http://dx.doi.org/10.1098/rsta.2016.0334.

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A family of Cu(II)-based metal–organic frameworks (MOFs) has been synthesized using three pyridyl-isophthalate ligands, H 2 L 1 (4′-(pyridin-4-yl)biphenyl-3,5-dicarboxylic acid), H 2 L 2 (4′′-(pyridin-4-yl)-1,1′:4′,1′′-terphenyl-3,5-dicarboxylic acid) and H 2 L 3 (5-[4-(pyridin-4-yl)naphthalen-1-yl]benzene-1,3-dicarboxylic acid). Although in each case the pyridyl-isophthalate ligands adopt the same pseudo-octahedral [Cu 2 (O 2 CR) 4 N 2 ] paddlewheel coordination modes, the resulting frameworks are structurally diverse, particularly in the case of the complex of Cu(II) with H 2 L 3 , which lea

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25

El Ghayati, Lhoussaine, Youssef Ramli, Tuncer Hökelek, Mohamed Labd Taha, Joel T. Mague, and El Mokhtar Essassi. "Crystal structure and Hirshfeld surface analysis of 3,4-dihydro-2-(2,4-dioxo-6-methylpyran-3-ylidene)-4-(4-pyridin-4-yl)-1,5-benzodiazepine." Acta Crystallographica Section E Crystallographic Communications 75, no. 1 (2019): 94–98. http://dx.doi.org/10.1107/s2056989018017565.

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The title compound, C20H17N3O3[systematic name: 2-(6-methyl-2,4-dioxopyran-3-ylidene)-4-(pyridin-4-yl)-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine], is built up from a benzodiazepine ring system linked to pyridyl and pendant dihydropyran rings, where the benzene and pyridyl rings are oriented at a dihedral angle of 43.36 (6)°. The pendant dihydropyran ring is rotationally disordered in a 90.899 (3):0.101 (3) ratio with the orientation of each component largely determined by intramolecular N—HDiazp...ODhydp(Diazp = diazepine and Dhydp = dihydropyran) hydrogen bonds. In the crystal, molecules are l

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26

Lin, Hong-Yan, Xun-Zhang Zhao, Ling Zeng, Qing-Lin Wang, Xiu-Li Wang, and Guo-Cheng Liu. "Assembly and Properties of Four New Metal–Organic Complexes Based on 1,4-Naphthalenedicarboxylate: Effect of Four Bis-pyridyl-bis-amide Ligands with Diverse Spacers in the Structures." Australian Journal of Chemistry 68, no. 10 (2015): 1550. http://dx.doi.org/10.1071/ch15110.

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Four new complexes based on 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) and four bis-pyridyl-bis-amide ligands with various spacers (3-bpye = N,N′-bis(3-pyridinecarboxamide)-1,2-ethane; 3-bpfp = bis(3-pyridylformyl)piperazine; 3-bpcd = N,N′-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide; and 3-bpcb = N,N′-bis(3-pyridinecarboxamide)-1,4-benzene), namely [Cu2(1,4-NDC)2(3-bpye)(H2O)] (1), [Cu(1,4-NDC)(3-bpfp)0.5] (2), [Cu3(1,4-NDC)3(3-bpcd)3]·2H2O (3), and [Cu(1,4-NDC)(3-bpcb)] (4), have been hydrothermally synthesized. Complex 1 is a 3D coordination network and represents an 8-connected {420.68

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27

Rahm, Fredrik, Andreas Fischer, and Christina Moberg. "Pyridyl Phosphinites and Pyridyl Phosphites from Chiral Pyridyl Alcohols— A Modular Approach." European Journal of Organic Chemistry 2003, no. 21 (2003): 4205–15. http://dx.doi.org/10.1002/ejoc.200300368.

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28

Rahm, Fredrik, Andreas Fischer, and Christina Moberg. "Pyridyl Phosphinites and Pyridyl Phosphites from Chiral Pyridyl Alcohols – A Modular Approach." European Journal of Organic Chemistry 2008, no. 10 (2008): 1817. http://dx.doi.org/10.1002/ejoc.200800169.

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29

Trotter, Kasey, Navamoney Arulsamy та Elliott Hulley. "Crystal structure ofcis,fac-{N,N-bis[(pyridin-2-yl)methyl]methylamine-κ3N,N′,N′′}dichlorido(dimethyl sulfoxide-κS)ruthenium(II)". Acta Crystallographica Section E Crystallographic Communications 71, № 9 (2015): m169—m170. http://dx.doi.org/10.1107/s2056989015014875.

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The reaction of dichloridotetrakis(dimethyl sulfoxide)ruthenium(II) withN,N-bis[(pyridin-2-yl)methyl]methylamine affords the title complex, [RuCl2(C13H15N3)(C2H6OS)]. The asymmetric unit contains a well-ordered complex molecule. TheN,N-bis[(pyridin-2-yl)methyl]methylamine (bpma) ligand binds the cation through its two pyridyl N atoms and one aliphatic N atom in a facial manner. The coordination sphere of the low-spind6RuIIis distorted octahedral. The dimethyl sulfoxide (dmso) ligand coordinates to the cation through its S atom and iscisto the aliphatic N atom. The two chloride ligands occupy t

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30

Baig, Fayaz, Rajni Kant, Vivek K. Gupta, and Madhushree Sarkar. "Effects of non covalent interactions in light emitting properties of bis-pyridyl-alkyl-di-imines." RSC Advances 5, no. 63 (2015): 51220–32. http://dx.doi.org/10.1039/c5ra09562j.

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Crystallization induced emission is observed for bis-pyridyl-ethyl-di-imine and bis-pyridyl-butyl-di-imine. While in case of bis-pyridyl-di-imines, with no alkyl spacer, the quenching is observed in the solid state.

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31

Ushakov, Ivan E., Ivan S. Odin, Pavel A. Gloukhov, Alexander A. Golovanov, Pavel V. Dorovatovskii, and Anna V. Vologzhanina. "Crystal structures of (E)-5-(4-methylphenyl)-1-(pyridin-2-yl)pent-2-en-4-yn-1-one and [3,4-bis(phenylethynyl)cyclobutane-1,2-diyl]bis(pyridin-2-ylmethanone)." Acta Crystallographica Section E Crystallographic Communications 76, no. 2 (2020): 192–96. http://dx.doi.org/10.1107/s2056989020000055.

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Recrystallization of (E)-5-phenyl-1-(pyridin-2-yl)pent-2-en-4-yn-1-one at room temperature from ethylene glycol in daylight afforded [3,4-bis(phenylethynyl)cyclobutane-1,2-diyl)bis(pyridin-2-ylmethanone], C32H22N2O2 (3), while (E)-5-(4-methylphenyl)-1-(pyridin-2-yl)pent-2-en-4-yn-1-one, C17H13NO (2), remained photoinert. This is the first experimental evidence that pentenynones can be photoreactive when fixed in nearly coplanar parallel positions. During the photoreaction, the bond lengths and angles along the pentenyne chain changed significantly, while the disposition of the pyridyl ring tow

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32

Popa, Marcel Mirel, Emilian Georgescu, Mino R. Caira, et al. "Indolizines and pyrrolo[1,2-c]pyrimidines decorated with a pyrimidine and a pyridine unit respectively." Beilstein Journal of Organic Chemistry 11 (June 26, 2015): 1079–88. http://dx.doi.org/10.3762/bjoc.11.121.

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The three possible structural isomers of 4-(pyridyl)pyrimidine were employed for the synthesis of new pyrrolo[1,2-c]pyrimidines and new indolizines, by 1,3-dipolar cycloaddition reaction of their corresponding N-ylides generated in situ from their corresponding cycloimmonium bromides. In the case of 4-(3-pyridyl)pyrimidine and 4-(4-pyridyl)pyrimidine the quaternization reactions occur as expected at the pyridine nitrogen atom leading to pyridinium bromides and consequently to new indolizines via the corresponding pyridinium N-ylides. However, in the case of 4-(2-pyridyl)pyrimidine the steric h

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33

Poplaukhin, Pavel, Hadi D. Arman та Edward R. T. Tiekink. "A one-dimensional coordination polymer, catena-poly[[[[N-ethyl-N-(pyridin-4-ylmethyl)dithiocarbamato-κ2 S,S′]zinc(II)]-μ2-N-ethyl-N-(pyridin-4-ylmethyl)dithiocarbamato-κ3 S,S′:N] 4-methylpyridine hemisolvate]". Acta Crystallographica Section E Crystallographic Communications 73, № 8 (2017): 1162–66. http://dx.doi.org/10.1107/s2056989017010179.

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The title compound, {[Zn(C9H11N2S2)2]·0.5C6H7N} n , comprises two independent, but chemically similar, Zn[S2CN(Et)CH2py]2 residues and a 4-methylpyridine solvent molecule in the asymmetric unit. The Zn-containing units are connected into a one-dimensional coordination polymer (zigzag topology) propagating in the [010] direction, with one dithiocarbamate ligand bridging in a μ2-κ3 mode, employing one pyridyl N and both dithiocarbamate S atoms, while the other is κ2-chelating. In each case, the resultant ZnNS4 coordination geometry approximates a square pyramid, with the pyridyl N atom in the ap

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34

Tenti, Giammarco, Ángel Cores, María Teresa Ramos, and J. Carlos Menéndez. "(E)-3-((2-Fluorophenyl)(hydroxy)methylene)imidazo[1,2-a]pyridin-2(3H)-one." Molbank 2021, no. 2 (2021): M1212. http://dx.doi.org/10.3390/m1212.

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Treatment of a N-2-pyridyl-β-ketoamide precursor with bromine afforded the first example of the 3-aryl(α-hydroxy)methylenelimidazo[1,2-a]pyridin-2(3H)-one framework. This transformation proceeded through a domino process comprising an initial bromination, cyclization via an intramolecular SN reaction, and a final keto-enol tautomerism, and allows generation of the fused heterocyclic system and installation of the acyl substituent in a single operation.

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35

Sedykh, Alexander E., Robin Bissert, Dirk G. Kurth, and Klaus Müller-Buschbaum. "Structural diversity of salts of terpyridine derivatives with europium(III) located in both, cation and anion, in comparison to molecular complexes." Zeitschrift für Kristallographie - Crystalline Materials 235, no. 8-9 (2020): 353–63. http://dx.doi.org/10.1515/zkri-2020-0053.

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AbstractThree salts of the common composition [EuCl2(X-tpy)2][EuCl4(X-tpy)]·nMeCN were obtained from EuCl3·6H2O and the respective organic ligands (X-tpy = 4′-phenyl-2,2′:6′,2″-terpyridine ptpy, 4′-(pyridin-4-yl)-2,2′:6′,2″-terpyridine 4-pytpy, and 4′-(pyridin-3-yl)-2,2′:6′,2″-terpyridine 3-pytpy). These ionic complexes are examples of salts, in which both cation and anion contain Eu3+ with the same organic ligands and chlorine atoms coordinated. As side reaction, acetonitrile transforms into acetamide resulting in the crystallization of the complex [EuCl3(ptpy)(acetamide)] (4). Salts [EuCl2(p

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36

Baykova, Svetlana O., Kirill K. Geyl, Sergey V. Baykov, and Vadim P. Boyarskiy. "Synthesis of 3-(Pyridin-2-yl)quinazolin-2,4(1H,3H)-diones via Annulation of Anthranilic Esters with N-pyridyl Ureas." International Journal of Molecular Sciences 24, no. 8 (2023): 7633. http://dx.doi.org/10.3390/ijms24087633.

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A new route for the synthesis of quinazolin-2,4(1H,3H)-diones and thieno [2,3-d]pyrimidine-2,4(1H,3H)-diones substituted by pyridyl/quinolinyl moiety in position 3 has been developed. The proposed method concluded in an annulation of substituted anthranilic esters or 2-aminothiophene-3-carboxylates with 1,1-dimethyl-3-(pyridin-2-yl) ureas. The process consists of the formation of N-aryl-N′-pyridyl ureas followed by their cyclocondensation into the corresponding fused heterocycles. The reaction does not require the use of metal catalysts and proceeds with moderate to good yields (up to 89%). Th

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37

Mayorova, E. I., T. A. Rumyantseva, M. I. Bazanov, and N. E. Galanin. "5-(2-pyridyl)tetrabenzoporphyrin and its complexes with zinc, cobalt, copper and iron. synthesis, spectral, electrochemical and electrocatalytic properties." Журнал общей химии 93, no. 7 (2023): 1114–23. http://dx.doi.org/10.31857/s0044460x23070168.

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The interaction of phthalimide with 2-picoline in the presence of zinc oxide synthesized 3-(pyridin-2-ylmethylene)isoindolin-1-one. Heating its mixture with an excess of phthalimide and zinc acetate leads to the formation of zinc 5-(2-pyridyl)tetrabenzoporphyrinate, which, upon treatment with acid, is converted to 5-(2-pyridyl) tetrabenzoporphyrin. The latter, when interacting with cobalt(II), copper(II), and iron(III) chlorides in DMF, forms the corresponding metal complexes. The composition and structure of the obtained compounds were confirmed by mass spectrometry, vibrational, 1H NMR, and

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38

Warrener, Ronald N., Douglas N. Butler, and Davor Margetic. "Preparation of the First Isobenzofuran Containing Two Ring Nitrogens: A New Diels - Alder Diene for the Synthesis of Molecular Scaffolds Containing One or More End-Fused 3,6-Di(2-pyridyl)pyridazine Ligands." Australian Journal of Chemistry 56, no. 8 (2003): 811. http://dx.doi.org/10.1071/ch03045.

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Preparation of a stable, crystalline isobenzofuran containing two ring-nitrogen atoms, 4,7-di(2-pyridyl)-5,6-diazaisobenzofuran (diaza-IBF) (12), is reported here for the first time. Diaza-IBF was prepared using the s-tetrazine-induced fragmentation of 1,4-di(2-pyridyl)-5,8-epoxy-5,8-dihydrophthalazine (9), for which a synthesis is provided. Diaza-IBF was also prepared by flash vacuum pyrolysis (FVP) of the isomeric N-methyl-1,4-di(2-pyridyl)-5,8-epoxy-5,6,7,8-tetrahydrophthalazine-6,7-dicarboximides (18) and (19), formed in three steps from furan, N-methyl maleimide, and 3,6-di(2-pyridyl)-s-t

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39

Shiga, Takuya, Rina Kumamaru, Graham N. Newton, and Hiroki Oshio. "Cobalt complexes with redox-active anthraquinone-type ligands." Dalton Transactions 47, no. 23 (2018): 7804–11. http://dx.doi.org/10.1039/c8dt00586a.

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Three anthraquinone-type multidentate ligands, HL<sup>1–3</sup> (HL = 2-R-1H-anthra[1,2-d]imidazole-6,11-dione; HL<sup>1</sup>: R = (2-pyridyl), HL<sup>2</sup>; R = (4,6-dimethyl-2-pyridyl), HL<sup>3</sup>; R = (6-methoxy-2-pyridyl)), were prepared, and their complexation behaviour was investigated.

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40

Churakov, Andrei V., Lyudmila G. Kuz'mina, Vyatcheslav N. Nuriev, Sergey Z. Vatsadze, and Nikolay V. Zyk. "3-(4-Pyridyl)-5-(2-pyridyl)-1H-pyrazole." Acta Crystallographica Section E Structure Reports Online 60, no. 7 (2004): o1231—o1233. http://dx.doi.org/10.1107/s1600536804013625.

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Qiang, Hong, Fan Zhang, and Zi-jia Wang. "(2-Pyridyl)[5-(2-pyridylcarbonyl)-2-pyridyl]methanone." Acta Crystallographica Section E Structure Reports Online 66, no. 10 (2010): o2632. http://dx.doi.org/10.1107/s1600536810033957.

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42

Routzomani, Anastasia, Zoi G. Lada, Varvara Angelidou, et al. "Confirming the Molecular Basis of the Solvent Extraction of Cadmium(II) Using 2-Pyridyl Oximes through a Synthetic Inorganic Chemistry Approach and a Proposal for More Efficient Extractants." Molecules 27, no. 5 (2022): 1619. http://dx.doi.org/10.3390/molecules27051619.

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The present work describes the reactions of CdI2 with 2-pyridyl aldoxime (2paoH), 3-pyridyl aldoxime (3paoH), 4-pyridyl aldoxime (4paoH), 2-6-diacetylpyridine dioxime (dapdoH2) and 2,6-pyridyl diamidoxime (LH4). The primary goal was to contribute to understanding the molecular basis of the very good liquid extraction ability of 2-pyridyl ketoximes with long aliphatic chains towards toxic Cd(II) and the inability of their 4-pyridyl isomers for this extraction. Our systematic investigation provided access to coordination complexes [CdI2(2paoH)2] (1), {[CdI2(3paoH)2]}n (2), {[CdI2(4paoH)2]}n (3)

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43

Tan, Yee Seng, Hao Zhe Chun, Mukesh M. Jotani, and Edward R. T. Tiekink. "Steric control of supramolecular association in structures of Zn(S2COR)2 with N,N′-bis(pyridin-4-ylmethyl)oxalamide." Zeitschrift für Kristallographie - Crystalline Materials 234, no. 3 (2019): 165–75. http://dx.doi.org/10.1515/zkri-2018-2120.

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Abstract The crystal and molecular structures of the one-dimensional coordination polymer [Zn(S2COEt)2(4LH2)]n (1) and binuclear [Zn(S2COCy)2]2(4LH2) (2) are described, where 4LH2 is N,N′-bis(pyridin-4-ylmethyl)ethanediamide. In 1, the Zn(S2COEt)2 entities are linked by bidentate bridging 4LH2 ligands through the pyridyl-N atoms to generate a twisted supramolecular chain. As a result of monodentate xanthate ligands, the N2S4 donor set defines a distorted tetrahedral coordination geometry and, crucially, allows the participation of the non-coordinating sulfur atoms in supramolecular association

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44

Ali, AS, JS Wilkie, and KN Winzenberg. "Synthesis of Some Hydrazone Derivatives Structurally Related to the Insecticide Pymetrozine." Australian Journal of Chemistry 49, no. 8 (1996): 927. http://dx.doi.org/10.1071/ch9960927.

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Reaction of pyridine-3-carbaldehyde methylhydrazone with 1,1'-carbonylbis-1H-imidazole afforded (E)-1'-methyl-2'-(3"-pyridyl) methylidene ]-1H-imidazole-1-carbohydrazide (2). Reaction of (2) with ethylamine, ethanol, ethanethiol, hydrazine monohydrate and methoxyamine afforded the corresponding semicarbazide, carbazate, thiocarbazate, carbonohydrazide and 4-methoxysemicarbazide derivatives (3a-d,g). Reaction of (2) with methylhydrazine gave the carbonohydrazide derivative (3f) together with 2,4-dimethyl-6-(3'-pyridyl)-1,4,5,6-tetrahydro-1,2,4,5-tetrazin-3(2H)-one (4a). The preparation of (E)-3

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45

Vorherr, Thomas, Ian Lewis, Joerg Berghausen, et al. "Pyridyl-Ala Modified Cyclic Hexapeptides: In-Vitro and In-Vivo Profiling for Oral Bioavailability." International Journal of Peptide Research and Therapeutics 26, no. 3 (2019): 1383–97. http://dx.doi.org/10.1007/s10989-019-09935-y.

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Abstract We and others have been aiming at modifications to maintain or to enhance solubility while enabling permeability for cyclic hexapeptides. Especially, the 2-pyridyl-Ala modification was investigated, since in this case, the pyridyl-nitrogen is able to form an H-bond to the NH of the same residue. The hypothesis of a backbone side-chain interaction was demonstrated by NMR experiments, and further results obtained on a variety of pyridyl-Ala derivatives, studied systematically in the context of permeability, are presented in this contribution. Thus, this study sheds some more light on th

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Baptayev, B., A. Rysbekova, D. Kalpakov, et al. "Control of Porphyrin Dye Aggregation Using Bis(4-pyridyl)Alkanes in Dye Sensitized Solar Cells." Eurasian Chemico-Technological Journal, no. 1 (February 20, 2019): 63. http://dx.doi.org/10.18321/ectj792.

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The aggregation of sensitizer molecules on the surface of photoanode is a serious issue that can affect the photovoltaic performance of dye-sensitized solar cells. Prevention of dye agglomeration, therefore, is critical. Traditional methods of aggregation control are either synthetically challenging or technologically difficult and expensive. In this article, the use of bis(4-pyridyl)alkanes to control porphyrin dye aggregation is presented. Three bis(4-pyridyl)alkanes – bis(4-pyridyl)butane L4, bis(4-pyridyl)octane L8 and bis(4-pyridyl)decane L10 were synthesized. These bis(4-pyridyl)alkane l

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47

Bell, Zöe R., Jon A. McCleverty, and Michael D. Ward. "New Multidentate Pyrazolyl - Pyridine Ligands—Synthesis and Structures." Australian Journal of Chemistry 56, no. 7 (2003): 665. http://dx.doi.org/10.1071/ch02251.

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Five new multidentate ligands have been prepared containing N,N-bidentate pyrazolyl–pyridine units linked to a central aromatic spacer unit. The ligands 3,3′-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)-p-terphenyl (1), 4,4′-bis(3-{pyridin-2-yl}-pyrazol-1-yl)biphenyl (2), and 1,8-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)naphthalene (3) have two bidentate arms and are therefore potentially tetradentate; 2,6-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)pyridine (4) has two bidentate arms with an additional nitrogen-donor in the aromatic spacer unit (a pyridyl group) and is therefore potentially pentade

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48

Sun, Han-Sheng, Yougen Chen, Wen-Ya Lee та ін. "Synthesis, morphology, and electrical memory application of oligosaccharide-based block copolymers with π-conjugated pyrene moieties and their supramolecules". Polymer Chemistry 7, № 6 (2016): 1249–63. http://dx.doi.org/10.1039/c5py01697e.

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49

Sah, Chitranjan, Mayank Saraswat, Lilit Jacob, and Sugumar Venkataramani. "Insights on unimolecular and bimolecular reactivity patterns of pyridyl, pyridyl-N-oxide, and pyridinyl radicals through spin density." Computational and Theoretical Chemistry 1191 (December 2020): 113025. http://dx.doi.org/10.1016/j.comptc.2020.113025.

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50

Peterson, Lisa A. "Formation, Repair, and Genotoxic Properties of Bulky DNA Adducts Formed from Tobacco-Specific Nitrosamines." Journal of Nucleic Acids 2010 (2010): 1–11. http://dx.doi.org/10.4061/2010/284935.

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4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) andN′-nitrosonornicotine (NNN) are tobacco-specific nitrosamines present in tobacco products and smoke. Both compounds are carcinogenic in laboratory animals, generating tumors at sites comparable to those observed in smokers. These Group 1 human carcinogens are metabolized to reactive intermediates that alkylate DNA. This paper focuses on the DNA pyridyloxobutylation pathway which is common to both compounds. This DNA route generates 7-[4-(3-pyridyl)-4-oxobut-1-yl]-2′-deoxyguanosine,O2-[4-(3-pyridyl)-4-oxobut-1-yl]-2′-deoxycytosine,O2-[4-(3

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