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Journal articles on the topic 'Pyridine(bromo)3 méthylthio-2)'

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Published: 4 June 2021

Last updated: 17 February 2022

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1

Jasril, Jasril, Hilwan Yuda Teruna, Adel Zamri, Darian Alfatos, Elka Yuslinda, and Yuana Nurulita. "Sintesis dan Uji Antibakteri Senyawa Bromo Kalkon Piridin." Jurnal Natur Indonesia 14, no. 3 (2013): 172. http://dx.doi.org/10.31258/jnat.14.3.172-175.

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Three pyridine chalcones including (Z)-1-(4-bromophenyl)-3-(pyridin-2-yl)prop-2-en-1-one (1), (Z)-1-(4-bromophenyl)-3- (pyridin- 3-yl)prop-2-en-1-one (2) and (Z)-1-(4-bromophenyl)-3-(pyridin-4-yl)prop-2-en-1-one (3) were synthesized by aldol condensation reactions from pyridinecarbaldehyde with 4-bromoacetophenone. In antibacterial assay, compound 3 exhibited strong activity against Staphylococcus aureus, Bacillus subtilis and Escherichia coli with the inhibition zone of 19.9; 19.5, and 17.5 mm, respectively.

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2

Singh, Govind Pratap, N. Rajesh Goud, P. Jeevan Kumar, C. N. Sundaresan, and G. Nageswara Rao. "2-Bromo-3-hydroxy-6-methylpyridine." Acta Crystallographica Section E Structure Reports Online 69, no. 12 (2013): o1729. http://dx.doi.org/10.1107/s1600536813029498.

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In the title compound, C6H6BrNO, the Br atom is displaced from the pyridine ring mean plane by 0.0948 (3) Å, while the hydroxyl O atom and the methyl C atom are displaced by 0.0173 (19) and 0.015 (3) Å, respectively. In the crystal, molecules are linkedviaO—H...N hydrogen bonds, forming chains propagating along thea-axis direction. These chains are linked by C—H...Br hydrogen bonds, forming corrugated two-dimensional networks lying parallel to theacplane.

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3

Riedmiller, Frank, Alexander Jockisch, and Hubert Schmidbaur. "Synthesis and Molecular Structures of 2-Trimethylsilyl-, 2-Trimethylgermyl-, and 2-Trimethylstannyl-pyridines." Zeitschrift für Naturforschung B 54, no. 1 (1999): 13–17. http://dx.doi.org/10.1515/znb-1999-0105.

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5-Methyl-2-trimethylsilyl-pyridine (1) has recently been prepared via the “in situ” Grignard reaction of 1-bromo-5-methyl-pyridine with magnesium and trimethylchlorosilane in refluxing tetrahydrofuran (thf) and structurally characterized. 2-Trimethylgermyl- (2) and 2- trimethylstannyl-pyridine (3) were now obtained from 2-bromo-pyridine through metallation (with n-BuLi) and treatment of the intermediates with Me3GeBr and Me3SnCl, respectively, in diethylether/ thf at -70°C. The crystal and molecular structure of compound 2 has been determined by low temperature (in situ) single crystal X-ray d

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4

Zhang, Rui, and Yongzhou Hu. "6-Bromo-3-(2-methylpropenyl)imidazo[1,2-a]pyridine." Acta Crystallographica Section E Structure Reports Online 61, no. 12 (2005): o4037—o4038. http://dx.doi.org/10.1107/s1600536805035634.

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5

Duan, Gui-Yun, Chang-Bing Tu, Ya-Wei Sun, Da-Tong Zhang, and Jian-Wu Wang. "2-(3-Bromo-4-methoxyphenyl)imidazo[1,2-a]pyridine." Acta Crystallographica Section E Structure Reports Online 62, no. 3 (2006): o1141—o1142. http://dx.doi.org/10.1107/s1600536806005836.

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6

Ouzidan, Younès, Youssef Kandri Rodi, Hafid Zouihri, El Mokhtar Essassi, and Seik Weng Ng. "3-Benzyl-6-bromo-2-(2-furyl)-3H-imidazo[4,5-b]pyridine." Acta Crystallographica Section E Structure Reports Online 66, no. 7 (2010): o1874. http://dx.doi.org/10.1107/s160053681002475x.

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7

Ouzidan, Younes, El Mokhtar Essassi, Santiago V. Luis, Michael Bolte, and Lahcen El Ammari. "6-Bromo-3-methyl-2-phenyl-3H-imidazo[4,5-b]pyridine." Acta Crystallographica Section E Structure Reports Online 67, no. 7 (2011): o1684. http://dx.doi.org/10.1107/s1600536811022318.

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8

Nazeer, Usman, Nasir Rasool, Aqsa Mujahid, et al. "Selective Arylation of 2-Bromo-4-chlorophenyl-2-bromobutanoate via a Pd-Catalyzed Suzuki Cross-Coupling Reaction and Its Electronic and Non-Linear Optical (NLO) Properties via DFT Studies." Molecules 25, no. 15 (2020): 3521. http://dx.doi.org/10.3390/molecules25153521.

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In the present study, 2-bromo-4-chlorophenyl-2-bromobutanoate (3) was synthesized via the reaction of 2-bromo-4-chlorophenol with 2-bromobutanoyl bromide in the presence of pyridine. A variety of 2-bromo-4-chlorophenyl-2-bromobutanoate derivatives (5a–f) were synthesized with moderate to good yields via a Pd-catalyzed Suzuki cross-coupling reaction. To find out the reactivity and electronic properties of the compounds, Frontier molecular orbital analysis, non-linear optical properties, and molecular electrostatic potential studies were performed.

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9

Kuhn, Norbert, Ahmed Al-Sheikh, and Manfred Steimann. "Synthesis and Structure of 1-{2,2-Dimethyl-4,6-dioxo-5-(1-pyridinio)-1,3- dioxan-5-yl}pyridinium Ylide: A New Route to Meldrum’s Acid Derivatives." Zeitschrift für Naturforschung B 58, no. 5 (2003): 381–84. http://dx.doi.org/10.1515/znb-2003-0504.

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2-Bromo-5,5-dimethyl-4,6-dioxo-1,3-dioxine (3) reacts with pyridine and aqueous potassium carbonate to give 1-{2,2-dimethyl-4,6-dioxo-5-(1-pyridinio)-1,3-dioxan-5-yl}pyridinium ylide (5). The crystal structure analysis confirms the betaine nature of 5 consisting of two distored ring fragments [interplanar angle 58.0(4)°] connected by a C-N single bond [1.440(1) Å ].

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10

Yokozawa, Tsutomu, Yutaka Nanashima, Haruhiko Kohno, Ryosuke Suzuki, Masataka Nojima та Yoshihiro Ohta. "Catalyst-transfer condensation polymerization for precision synthesis of π-conjugated polymers". Pure and Applied Chemistry 85, № 3 (2012): 573–87. http://dx.doi.org/10.1351/pac-con-12-03-13.

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Catalyst-transfer condensation polymerization, in which the catalyst activates the polymer end-group, followed by reaction with the monomer and transfer of the catalyst to the elongated polymer end-group, has made it feasible to control the molecular weight, polydispersity, and end-groups of π-conjugated polymers. In this paper, our recent progress of Kumada–Tamao Ni catalyst-transfer coupling polymerization and Suzuki–Miyaura Pd catalyst-transfer coupling polymerization is described. In the former polymerization method, the polymerization of Grignard pyridine monomers was investigated for the

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11

Wolińska, Ewa. "Chiral oxazoline ligands with two different six-membered azaheteroaromatic rings – synthesis and application in the Cu-catalyzed nitroaldol reaction." Heterocyclic Communications 22, no. 2 (2016): 85–94. http://dx.doi.org/10.1515/hc-2016-0001.

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AbstractSynthesis and catalytic activity of chiral ligands 5,6-diphenyl-3-{3-[(4S/R)-4-R/Ar-4,5-dihydro-1,3-oxazol-2-yl]pyridin-2-yl}amino-1,2,4-triazines 2 and their analogs 3 possessing an N-oxide function in the pyridine ring are described. The pivotal step in the synthesis of ligands 2 is the Buchwald-Hartwig Pd-catalyzed cross-coupling reaction between 3-bromo-5,6-diphenyl-1,2,4-triazine (7a) and enantiopure 3-(4,5-dihydro-1,3-oxazol-2-yl)pyridin-2-amines 6a–d. Aromatic nucleophilic substitution of chlorine in 3-chloro-5,6-diphenyl-1,2,4-triazine (7b) with 3-(4,5-dihydro-1,3-oxazol-2-yl)p

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12

Averin, Alexei D., Olesya A. Ulanovskaya, Nataliya A. Pleshkova, Anatolii A. Borisenko, and Irina P. Beletskaya. "Pd-Catalyzed Amination of 2,6-Dihalopyridines with Polyamines." Collection of Czechoslovak Chemical Communications 72, no. 5-6 (2007): 785–819. http://dx.doi.org/10.1135/cccc20070785.

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The Pd-catalyzed amination of 2,6-dibromopyridine with various linear polyamines and oxapolyamines was studied. In this way polyazamacrocycles 3 containing one pyridine and one polyamine moiety were synthesized using equimolar amounts of starting compounds. Two alternative approaches were elaborated and compared for synthesis of macrocycles 11 comprising two pyridine and two polyamine fragments: via intermediate formation of Nα,Nω-bis(6-halopyridin-2-yl)polyamines 7, 8 or via 2,6-bis(polyamino)-substituted pyridines 10. A series of N-(6-tert-butoxypyridin-2-yl)-substituted polyamines 12 and Nα

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13

Kamlah, Alexandra, and Franz Bracher. "A Short Synthesis of the Plant Alkaloid 4-Methyl-2,6-naphthyridine." Letters in Organic Chemistry 16, no. 12 (2019): 931–34. http://dx.doi.org/10.2174/1570178616666181116110647.

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: A new synthesis of the 2,6-naphthyridine alkaloid 4-methyl-2,6-naphthyridine from Antirrhinum majus has been developed. Key steps are a regioselective oxidation of 3-bromo-4,5- dimethylpyridine to the corresponding 4-formyl derivative, and the annulation of the second pyridine ring by Suzuki-Miyaura cross-coupling using (E)-2-ethoxyvinylboronic acid pinacol ester as a masked acetaldehyde equivalent. This protocol gives the alkaloid in four steps starting from commercially available 3,4-dimethylpyridine in 15% overall yield. This annulation protocol should be useful for the synthesis of other

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14

Mallet, Marc, Gilles Branger, Francis Marsais, and Guy Queguiner. "Migration du lithium en série pyridinique: double catalyse et reformage. Accès aux dérivés de la bromo-2 lithio-3 pyridine et des bromo-4 halogéno-2 lithio-3 pyridines." Journal of Organometallic Chemistry 382, no. 3 (1990): 319–32. http://dx.doi.org/10.1016/0022-328x(90)80210-q.

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15

Kandri Rodi, Youssef, Santiago V. Luis, Inés Martí, Vicente Martí-Centelles, and Younès Ouzidan. "Synthesis and Crystal Structure of 6-Bromo-2-(furan-2-yl)-3-(prop-2-ynyl)-3H-imidazo[4,5-b]pyridine." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/410304.

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The crystal and molecular structure of 6-bromo-2-(furan-2-yl)-3-(prop-2-ynyl)-3H-imidazo[4,5-b]pyridine (C13H8BrN3O) has been investigated from single crystal X-ray diffraction data. The primary focus is to investigate the molecular geometry of this compound in the solid state along with the associated intermolecular hydrogen bonding and relatedπ-πinteractions present in the crystal packing. This compound crystallizes in the monoclinic space groupP21/nwith cell parameters:a= 4.39655(19) Å,b= 13.5720(5) Å,c= 20.0471(5) Å,β= 94.753(3),V= 1192.10(7) Å3,D= 1.683 g·cm−3, andZ= 4. The crystal struct

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16

Thomas, Lynne H., Martin S. Adam, Andrew O'Neill, and Chick C. Wilson. "Utilizing proton transfer to produce molecular salts in bromanilic acid substituted-pyridine molecular complexes – predictable synthons?" Acta Crystallographica Section C Crystal Structure Communications 69, no. 11 (2013): 1279–88. http://dx.doi.org/10.1107/s0108270113029533.

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Controlled introduction of proton transfer into the design of a series of molecular complexes is described, delivering the systematic production of ionic molecular complexes (molecular salts). The controlled production of molecular salts has relevance as a potential strategy in the design of pharmaceutical materials. In nine molecular complexes consisting of bromanilic acid with the N-heterocyclic compounds 2-, 3- and 4-picoline [bis(2/3/4-methylpyridinium) 2,5-dibromo-3,6-dioxocyclohexa-1,4-diene-1,4-diolate, 2C6H8N+·C6Br2O42−], 2,3-, 2,4-, 2,5- and 3,5-lutidine [2,3/2,4/2,5/3,5-dimethylpyrid

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17

Hung, Tran, Nguyen Quan, Hoang Van Dong, et al. "Synthesis of 5-Aryl-5H-pyrido[2',1':2,3]imidazo[4,5-b]indoles by Domino Pd- and Cu-Catalyzed C–N Coupling Reactions." Synlett 30, no. 03 (2019): 303–6. http://dx.doi.org/10.1055/s-0037-1611957.

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A series of 5-aryl-5H-pyrido[2',1':2,3]imidazo[4,5-b]indoles was successfully prepared in good yields by a practical four-step strategy. In this procedure, the key step was demonstrated to be the domino Pd-and Cu-catalyzed C–N coupling reactions of 3-bromo-2-(2-bromophenyl)imidazo[1,2-a]pyridine with amines.

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18

Ali, Hapipah M., Siti Nadiah Abdul Halim та Seik Weng Ng. "Bis[5-bromo-1H-indole-3-carbaldehyde (2-nitrobenzoyl)hydrazonato-κ2N,O]bis(pyridine-κN)nickel(II) pyridine disolvate". Acta Crystallographica Section E Structure Reports Online 61, № 9 (2005): m1682—m1683. http://dx.doi.org/10.1107/s1600536805024062.

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19

Soni, Hetal I., and Navin B. Patel. "PYRIMIDINE INCORPORATED SCHIFF BASE OF ISONIAZID WITH THEIR SYNTHESIS, CHARACTERIZATION AND IN VITRO BIOLOGICAL EVALUATION." Asian Journal of Pharmaceutical and Clinical Research 10, no. 10 (2017): 209. http://dx.doi.org/10.22159/ajpcr.2017.v10i10.19302.

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Objective: Versatile biological activities of nitrogen containing heterocycles in medicinal chemistry, mainly pyrimidine and pyridine ring based heterocyclic moieties are very important. Pharmaceutical important of pyrimidine and isoniazid moiety prompted us to synthesize isoniazid clubbed pyrimidine derivatives and evaluated for antimicrobial and antituberculosis activity.Method: 2-(2-(3-bromo benzylidene)-1-isonicotinoyl hydrazinyl)-N-(4-(substituted phenyl)-6-(substituted aryl) pyrimidin-2-yl) acetamide 2(A-J) have been synthesized by condensation reaction of 2-chloro-N-[4-(substituted phen

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20

Liu, Yangmei, Kai Cao та Fenglin Wang. "Poly[[aqua(μ2-4,4′-bipyridine-κ2N:N′)[μ3-3-bromo-2-(carboxylatomethyl)benzoato-κ3O1:O1′:O2]cadmium] monohydrate]". Acta Crystallographica Section E Structure Reports Online 68, № 8 (2012): m1071. http://dx.doi.org/10.1107/s1600536812031297.

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In the title compound, {[Cd(C9H5BrO4)(C10H8N2)(H2O)]·H2O}n, the CdIIatom has a distorted octahedral coordination geometry. Two N atoms from two 4,4′-bipyridine (bipy) ligands occupy the axial positions, while the equatorial positions are furnished by three carboxylate O atoms from three 3-bromo-2-(carboxylatomethyl)benzoate (bcb) ligands and one O atom from a water molecule. The bipy and bcb ligands link the CdIIatoms into a three-dimensional network. O—H...O hydrogen bonds and π–π interactions between the pyridine and benzene rings [centroid–centroid distance = 3.736 (4) Å] are present in the

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21

Deacon, GB, and GN Stretton. "Organomercury Compounds. XXVII. The Synthesis and Properties of Some Carboxylato- and Carboxy-pyridinylmercurials." Australian Journal of Chemistry 38, no. 3 (1985): 419. http://dx.doi.org/10.1071/ch9850419.

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Decarboxylation of mercuric pyridine-2,3-dicarboxylate in hot dimethyl sulfoxide or hexamethylphosphoramide gives a mixture of 2-carboxylatopyridin-3-ylmercury(II) (major product) and 3- carboxylatopyridin-2-ylmercury(II) (minor product). The mixture reacts ( i ) with acidified halide ions ( Cl - or I-) to yield a mixture of the corresponding carboxypyridinyl ( halogeno )mercury(II) derivatives, (ii) with tribromide ions to give the bromo ( carboxypyridinyl )mercury(ii) complexes, 3-bromopyridine-2-carboxylic acid, and 2-bromopyridine-3- carboxylic acid, and (iii) with iodide ions in hot aqueo

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22

Bai, Hui, Xuelian Liu, Pengfei Chenzhang, Yumei Xiao, Bin Fu, and Zhaohai Qin. "Design, Synthesis and Fungicidal Activity of New 1,2,4-Triazole Derivatives Containing Oxime Ether and Phenoxyl Pyridinyl Moiety." Molecules 25, no. 24 (2020): 5852. http://dx.doi.org/10.3390/molecules25245852.

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A series of novel 1,2,4-triazole derivatives containing oxime ether and phenoxy pyridine moiety were designed and synthesized. The new compounds were identified by nuclear magnetic resonance (NMR) spectroscopy and high-resolution mass spectrometry (HRMS). Compound (Z)-1-(6-(4-nitrophenoxy)pyridin-3-yl)-2-(1H-1,2,4-triazol-1-yl)ethan-1-one O-methyl oxime (5a18) was further confirmed by X-ray single crystal diffraction. Their antifungal activities were evaluated against eight phytopathogens. The in vitro bioassays indicated that most of the title compounds displayed moderate to high fungicidal a

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23

Wang, Li Hua, Zi Jian Wang, Mei Li Zhao, et al. "Synthesis, Crystal Structure of Tetra-Nuclear Macrocyclic Zn(II) Complex and Its Application as Catalyst for Oxidation of Benzyl Alcohol." Bulletin of Chemical Reaction Engineering & Catalysis 16, no. 4 (2021): 839–46. http://dx.doi.org/10.9767/bcrec.16.4.10978.839-846.

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A new six coordinated tetra-nuclear macrocyclic Zn(II) complex, ZnL4(Phen)2 (1) (HL= 3-bromo-2-hydroxybenzaldehyde-pyridine-2-carbohydrazone, Phen = 1,10-phenanthroline) has been synthesized by the self-assembly of 3-bromo-2-hydroxybenzaldehyde-pyridine-2-carbohydrazone, Zn(CH3COO)2•2H2O, NaOH and 1,10-phenanthroline in water/ethanol (v:v = 1:3) solution. Complex 1 was characterized by elemental analysis, infra red (IR), and single-crystal X-ray diffraction (XRD) analysis. The results show that Zn1 and Zn1b ions are six-coordinated with a distorted octahedral geometric configuration by four O

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24

Abdel-Aziz, Hatem A., Nehal A. Hamdy, Amira M. Gamal-Eldeen, and Issa M. I. Fakhr. "Synthesis of New 2-Substituted 6-Bromo-3-methylthiazolo[3,2-a]- benzimidazole Derivatives and their Biological Activities." Zeitschrift für Naturforschung C 66, no. 1-2 (2011): 7–16. http://dx.doi.org/10.1515/znc-2011-1-202.

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1-(6-Bromo-3-methyl-1,3-thiazolo[3,2-a]benzimidazol-2-yl)ethanone (2) was prepared by bromination at ambient temperature of 1-(3-methylthiazolo[3,2-a]benzimidazol-2-yl)ethanone (1). The structure of 2 was determined by single-crystal X-ray diffraction. The precursor 5 was synthesized by heating a mixture of acetyl 2 and bromine. Various 2-substituted 6-bromo-3-methylthiazolo[3,2-a]benzimidazoles containing 1,3-thiazole, 1,4-benzothiazine, quinoxaline or imidazo[1,2-a]pyridine moieties were prepared starting from bromoacetyl 5. Taken together from the biological investigations, 2, 5, and 7a wer

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25

Jabri, Zainab, Karim Jarmoni, Tuncer Hökelek, et al. "Crystal structure, Hirshfeld surface analysis and DFT studies of 6-bromo-3-(12-bromododecyl)-2-(4-nitrophenyl)-4H-imidazo[4,5-b]pyridine." Acta Crystallographica Section E Crystallographic Communications 76, no. 5 (2020): 677–82. http://dx.doi.org/10.1107/s2056989020005228.

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The title compound, C24H30Br2N4O2, consists of a 2-(4-nitrophenyl)-4H-imidazo[4,5-b]pyridine entity with a 12-bromododecyl substituent attached to the pyridine N atom. The middle eight-carbon portion of the side chain is planar to within 0.09 (1) Å and makes a dihedral angle of 21.9 (8)° with the mean plane of the imidazolopyridine moiety, giving the molecule a V-shape. In the crystal, the imidazolopyridine units are associated through slipped π–π stacking interactions together with weak C—HPyr...ONtr and C—HBrmdcyl...ONtr (Pyr = pyridine, Ntr = nitro and Brmdcyl = bromododecyl) hydrogen bonds

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26

Surasani, Rajendra, Dipak Kalita, A. V. Dhanunjaya Rao, and K. B. Chandrasekhar. "Palladium-catalyzed C–N and C–O bond formation of N-substituted 4-bromo-7-azaindoles with amides, amines, amino acid esters and phenols." Beilstein Journal of Organic Chemistry 8 (November 19, 2012): 2004–18. http://dx.doi.org/10.3762/bjoc.8.227.

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Simple and efficient procedures for palladium-catalyzed cross-coupling reactions of N-substituted 4-bromo-7-azaindole (1H-pyrrole[2,3-b]pyridine), with amides, amines, amino acid esters and phenols through C–N and C–O bond formation have been developed. The C–N cross-coupling reaction of amides, amines and amino acid esters takes place rapidly by using the combination of Xantphos, Cs2CO3, dioxane and palladium catalyst precursors Pd(OAc)2/Pd2(dba)3. The combination of Pd(OAc)2, Xantphos, K2CO3 and dioxane was found to be crucial for the C–O cross-coupling reaction. This is the first report on

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27

Zhang, Ji-Run, Hao Deng, and Tong Liu. "The crystal structure of 3-bromo-6-methoxy-2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, C13H19BBrNO3." Zeitschrift für Kristallographie - New Crystal Structures 235, no. 2 (2020): 451–52. http://dx.doi.org/10.1515/ncrs-2019-0756.

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AbstractC13H19BBrNO3, triclinic, P1̄ (no. 2), a = 6.5459(3) Å, b = 11.2565(5) Å, c = 11.8529(5) Å, α = 106.938(2)°, β = 105.657(2)°, γ = 106.628(2)°, V = 738.71(6) Å3, Z = 2, Rgt(F) = 0.0286, wRref(F2) = 0.0641, T = 173 K.

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28

Hernández, Wilfredo, Fernando Carrasco, Abraham Vaisberg, et al. "Synthesis, Spectroscopic Characterization, Structural Studies, and In Vitro Antitumor Activities of Pyridine-3-carbaldehyde Thiosemicarbazone Derivatives." Journal of Chemistry 2020 (September 14, 2020): 1–12. http://dx.doi.org/10.1155/2020/2960165.

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Eight new thiosemicarbazone derivatives, 6-(1-trifluoroethoxy)pyridine-3-carbaldehyde thiosemicarbazone (1), 6-(4′-fluorophenyl)pyridine-3-carbaldehyde thiosemicarbazone (2), 5-chloro-pyridine-3-carbaldehyde thiosemicarbazone (3), 2-chloro-5-bromo-pyridine-3-carbaldehyde thiosemicarbazone (4), 6-(3′,4′-dimethoxyphenyl)pyridine-3-carbaldehyde thiosemicarbazone (5), 2-chloro-5-fluor-pyridine-3-carbaldehyde thiosemicarbazone, (6), 5-iodo-pyridine-3-carbaldehyde thiosemicarbazone (7), and 6-(3′,5′-dichlorophenyl)pyridine-3-carbaldehyde thiosemicarbazone (8) were synthesized, from the reaction of t

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29

Zimmermann, Christopher, Walter Bauer, Frank W. Heinemann, and Andreas Grohmann. "Tetrapodal Pentadentate Ligands with NS4 and NP4 Donor Sets: An Elusive Tetrathiol, and a Sterically Encumbered Tetraphosphane." Zeitschrift für Naturforschung B 57, no. 11 (2002): 1256–64. http://dx.doi.org/10.1515/znb-2002-1110.

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With the intention of preparing tetrapodal pentadentate ligands having NS4 or NP4 donor sets, we investigated reactions of the previously reported tetratosylate 2,6-C5H3N[CMe(CH2OTs)2]2 (2) with thiourea or diphenylphosphide, but found them not to proceed cleanly, and to give mixtures of products. A derivative of 2 better suited to nucleophilic substitution is the corresponding tetrabromide 2,6-C5H3N[CMe(CH2Br)2]2(2,6-bis-(2-bromo-1-bromomethyl-1- methyl-ethyl)-pyridine, 3), which is obtained in excellent yield from 2 by treatment with LiBr in dimethylsulfoxide. The reaction of 3 with 4 eq of

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30

Bhattacharya, Apurba, Vikram C. Purohit, Prashant Deshpande, et al. "An Alternate Route to 2-Amino-3-nitro-5-bromo-4-picoline: Regioselective Pyridine Synthesis via 2-Nitramino-picoline Intermediate." Organic Process Research & Development 11, no. 5 (2007): 885–88. http://dx.doi.org/10.1021/op700114d.

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31

Shiotani, Shunsaku, and Hiroyuki Morita. "Furopyridines.XII. Reaction of 3-bromo, 2-phenylthio and 2-phenylthio-3-bromo derivatives of furo[2,3-b]-, furo[3,2-b]-, furo[2,3-c]- and furo[3,2-c]pyridine with several alkyllithiums." Journal of Heterocyclic Chemistry 29, no. 2 (1992): 413–22. http://dx.doi.org/10.1002/jhet.5570290221.

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32

Laus, Gerhard, Klaus Wurst, Volker Kahlenberg, Holger Kopacka, Christoph Kreutz, and Herwig Schottenberger. "N-Heterocyclic Carbene (NHC) Derivatives of 1,3-Di(benzyloxy)imidazolium Salts." Zeitschrift für Naturforschung B 65, no. 7 (2010): 776–82. http://dx.doi.org/10.1515/znb-2010-0702.

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1-Hydroxyimidazole-3-oxide (1) was alkylated with benzyl bromide in the presence of NaHCO3 to give the new 1,3-di(benzyloxy)imidazolium bromide 2a which was converted to the hexafluorophosphate 2b and bis(trifluoromethylsulfonyl)imide 2c. From this cation, pyridine generated a carbene which was trapped by sulfur or selenium to yield the respective 2-thione 3 or 2-selone 4. Bromination afforded the 2-bromo derivative 5. Reaction of the hexafluorophosphate 2b with silver oxide gave the silver-N-heterocyclic carbene complex 6 which was transmetallated with Au(Me2S)Cl to the gold-carbene complex 7

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33

Ouzidan, Younes, Youssef Kandri Rodi, Frank R. Fronczek, Ramaiyer Venkatraman, El Mokhtar Essassi, and Lahcen El Ammari. "3-[(1-Benzyl-1H-1,2,3-triazol-5-yl)methyl]-6-bromo-2-phenyl-3H-imidazo[4,5-b]pyridine." Acta Crystallographica Section E Structure Reports Online 67, no. 4 (2011): o890—o891. http://dx.doi.org/10.1107/s1600536811009123.

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34

Sonawane, R. S., Mrunal Shirsat, S. R. Patil, J. C. Hundiwale, and A. V. P. atil. "Design and Synthesis of Novel Imidazopyridine Analogues and Evaluation as H+/K+-ATPase Antagonist." Asian Journal of Chemistry 32, no. 11 (2020): 2685–92. http://dx.doi.org/10.14233/ajchem.2020.22697.

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CID data base were explored considering AZD0865 as standard and docked in proton pump ATPase pocket (PDB ID: 4ux2) to find out novel imidazopyridine derivatives as proton pump inhibitors. A number of compounds showed good proton pump ATPase inhibitory activity as per the molecular docking study as compared to standard compound AZD0865. The compound AZD0865showed a docking score of -7.11 and revealed the interactions with amino acids Asn 138 and Asp 137. A series of novel imidazopyridine derivatives as proton pump inhibitors were docked, synthesized and characterized by IR, NMR, CHN and MS spec

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35

Mohan, Bharti, and Mukesh Choudhary. "Exploration of Theoretical and Antioxidant Mimetic Activities of Binuclear Copper(II) and Nickel(II) Coordination Complexes." Asian Journal of Chemistry 33, no. 9 (2021): 2191–202. http://dx.doi.org/10.14233/ajchem.2021.23339.

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Three dinuclear copper(II) and nickel(II) complexes viz. [Cu2(La)(py)2]·(ClO4)2 (1), [Ni2(Lb)(ImH)2]·(ClO4)2 (2) and [Ni2(Lc)(H2O)2]·(ClO4)2 (3) were designed and synthesized using disulfide and auxiliary ligands as functional models for antioxidant superoxide dismutase enzyme (where, H2La-H2Lc = disulfide ligands bearing S-S bond, py = pyridine, ImH = imidazole). The disulfide ligands were synthesized by condensation reaction of 2-(2-(2-aminophenyl)disulfanyl)benzeneamine with 3-bromo-2-hydroxy-5-nitrobenzaldehyde; 5-bromo-2-hydroxybenzaldehyde and 3,5-dichloro- 2-hydroxybenzaldehyde, respect

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36

Jindřich, Jindřich, Hana Dvořáková, and Antonín Holý. "Synthesis of Isomeric N-(3-Fluoro-2-hydroxypropyl) and N-(2-Fluoro-3-hydroxypropyl) Derivatives of Purine and Pyrimidine Bases." Collection of Czechoslovak Chemical Communications 57, no. 7 (1992): 1466–82. http://dx.doi.org/10.1135/cccc19921466.

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Reaction of fluoromethyloxirane (III) with heterocyclic bases in the presence of potassium carbonate afforded N-(3-fluoro-2-hydroxypropyl) derivatives of adenine (VI), 3-deazaadenine (VII), 2-amino-6-chloropurine (XII), 6-nitro-1-deazapurine (IX), 4-methoxy-2-pyrimidone (XVIII) and its 5-methyl derivative (XIX). Acid hydrolysis of compounds XII, XVIII, and XIX gave 9-(3-fluoro-2-hydroxypropyl)guanine (XIII), 1-(3-fluoro-2-hydroxypropyl)uracil (XX) and -thymine (XXI). The intermediates XVIII and XIX were ammonolyzed to give 1-(3-fluoro-2-hydroxypropyl)cytosine (XXII) and -5-methylcytosine (XXII

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37

Li, Zhun, Yang Wen, Ying Wang, and Shaomin Zhu. "Highly transparent and organosoluble polyimides derived from 2,2′-bis[4-(5-amino-2-pyridinoxy) phenyl] propane." High Performance Polymers 29, no. 2 (2016): 161–69. http://dx.doi.org/10.1177/0954008316632291.

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Two new isomers containing pyridine ring diamine monomers, 2,2′-bis[4-(5-amino-2-pyridinoxy)phenyl] propane (1b) and 2,2′-bis[4-(6-amino-3-pyridinoxy)phenyl] propane (2b), were prepared via a simple nucleophilic reaction of 2-chloro-5-nitropyridine and 5-bromo-2-nitropyridine with bisphenol A in the presence of potassium carbonate, respectively. A series of polyimides (PIs) were obtained from the heterocyclic diamine with various commercially available aromatic dianhydrides via the conventional two-step method. These obtained PIs were investigated in aspects of their solubility, thermal, mecha

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Xu, Chen, Ying-Li Song та Zhi-Qiang Wang. "Crystal structure of [2-(4-bromophenyl)pyridine-κ2C,N)bromo[1,3-bis- (4-methylphenyl)imidazol-2-ylidene-κC)] palladium(II), C28H23Br2N3Pd". Zeitschrift für Kristallographie - New Crystal Structures 230, № 2 (2015): 99–100. http://dx.doi.org/10.1515/ncrs-2014-0254.

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39

Bavin, P. M. G., D. Stephenson, and J. A. S. Smith. "14N Quadrupole Cross-Relaxation Spectroscopy of a Compound of Pharmacological Interest." Zeitschrift für Naturforschung A 41, no. 1-2 (1986): 195–99. http://dx.doi.org/10.1515/zna-1986-1-232.

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Cross-relaxation spectroscopy has been used to record the 14N quadrupole resonance spectrum of two of the polymorphic forms of the pharmacologically-important compound: 2-4-(5-Bromo- 3-methylpyrid-2-yl)butylammo-5-(6-methylpyrid-3-yl)methyl-pyrimidin-4-one.Three 14N frequencies for four of the non-equivalent nitrogen sites within the molecule have been identified by combined irradiation and cross-relaxation techniques and quadrupole coupling constants and asymmetry parameters deduced therefrom; the absence of 14N (and 79Br) signals from the bromine-substituted pyridine ring suggests that this

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Zheng, Chang Zheng, Liang Wang, and Juan Liu. "Synthesis,Crystal Structure and Antibacterial Activity of Nickel Complex with 5-Bromo-2- Hydroxyphenyl Ethyl Ketone Benzoyl Hydrazone." Advanced Materials Research 239-242 (May 2011): 2153–57. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.2153.

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The title complex, [(C5H5N)Ni(C15H11N2O2Br)], was synthesized by the reaction of the 5-bromo-2-hydroxyphenyl ethyl ketone benzoyl hydrazone, pyridine ligand and nickel chloride in acetone. The crystal structure was determined by single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group C2/c with a = 29.507(4) Ǻ, b = 7.7738(11) Ǻ, c = 20.205(3) Ǻ, β = 126.614(2)º, Z = 8, V = 3720.1(9) Ǻ3. Its crystal structure was determined and refined to a final R= 0.0304 for 8902 independent reflections. The center nickel atom is four-coordinated. The antibacterial activity of t

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Sowmya, Haliwana B. V., Tholappanavara H. Suresha Kumara, Nagendrappa Gopalpur та ін. "Crystal structures of five (2-chloroquinolin-3-yl)methyl ethers: supramolecular assembly in one and two dimensions mediated by hydrogen bonding and π–π stacking". Acta Crystallographica Section E Crystallographic Communications 71, № 6 (2015): 609–17. http://dx.doi.org/10.1107/s2056989015008233.

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In the molecules of the title compounds, methyl 5-bromo-2-[(2-chloroquinolin-3-yl)methoxy]benzoate, C18H13BrClNO3, (I), methyl 5-bromo-2-[(2-chloro-6-methylquinolin-3-yl)methoxy]benzoate, C19H15BrClNO3, (II), methyl 2-[(2-chloro-6-methylquinolin-3-yl)methoxy]benzoate, C19H16ClNO3, (III), which crystallizes withZ′ = 4 in space groupP212121, and 2-chloro-3-[(naphthalen-1-yloxy)methyl]quinoline, C20H14ClNO, (IV), the non-H atoms are nearly coplanar, but in {5-[(2-chloroquinolin-3-yl)methoxy]-4-(hydroxymethyl)-6-methylpyridin-3-yl}methanol, C18H17ClN2O3, (V), the planes of the quinoline unit and o

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42

Lee, See Mun, Nathan R. Halcovitch, Mukesh M. Jotani, and Edward R. T. Tiekink. "N′-[1-(5-Bromo-2-hydroxyphenyl)ethylidene]isonicotinohydrazide monohydrate: crystal structure and Hirshfeld surface analysis." Acta Crystallographica Section E Crystallographic Communications 73, no. 4 (2017): 630–36. http://dx.doi.org/10.1107/s2056989017004790.

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In the title isonicotinohydrazide hydrate, C14H12BrN3O2·H2O {systematic name:N′-[(1E)-1-(5-bromo-2-hydroxyphenyl)ethylidene]pyridine-4-carbohydrazide monohydrate}, the central CN2O region of the organic molecule is planar and the conformation about the imine-C=N bond isE. While an intramolecular hydroxy-O—H...N(imine) hydrogen bond is evident, the dihedral angle between the central residue and the benzene rings is 48.99 (9)°. Overall, the molecule is twisted, as seen in the dihedral angle of 71.79 (6)° between the outer rings. In the crystal, hydrogen-bonding interactions,i.e. hydrazide-N—H...

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SHIOTANI, S., and H. MORITA. "ChemInform Abstract: Furopyridines. Part 12. Reaction of 3-Bromo, 2-Phenylthio and 2- Phenylthio-3-bromo Derivatives of Furo(2,3-b)-, Furo(3,2-b)-, Furo(2,3- c)- and Furo(3,2-c)pyridine with Several Alkyllithiums." ChemInform 23, no. 39 (2010): no. http://dx.doi.org/10.1002/chin.199239201.

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44

Premkumar, S., A. Jawahar, T. Mathavan, M. Kumara Dhas, and A. Milton Franklin Benial. "Vibrational spectroscopic and DFT calculation studies of 2-amino-7-bromo-5-oxo-[1]benzopyrano [2,3-b]pyridine-3 carbonitrile." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 138 (March 2015): 252–63. http://dx.doi.org/10.1016/j.saa.2014.11.029.

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45

Handlovic, Troy T., Tyler Moreira, Anoshia Khan, et al. "Facile Synthesis and Characterization of a Bromine-Substituted (Chloromethyl)Pyridine Precursor towards the Immobilization of Biomimetic Metal Ion Chelates on Functionalized Carbons." C 7, no. 3 (2021): 54. http://dx.doi.org/10.3390/c7030054.

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Multidentate ligands involving tethered pyridyl groups coordinated to transition metal ions have been frequently used to mimic the 3-histidine (3H), 2-histidine-1-carboxylate (2H1C) brace motifs or other combinations of histidine and carboxylate endogenous ligating residues found in bioinorganic metalloenzymes. It is of interest to immobilize these ligand chelates onto heterogeneous supports. This, however, requires the use of bromine-substituted (chloromethyl)pyridines, whose current synthetic routes involve the use of extremely pyrophoric chemicals, such as n-butyllithium that require cryoge

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46

Appleton, TG, JR Hall, and MA Williams. "Dimethylplatinum(IV) Complexes With Cyanide: Thermal and Photoassisted Substitution Reactions, and Characterization of Products by N.M.R." Australian Journal of Chemistry 40, no. 9 (1987): 1565. http://dx.doi.org/10.1071/ch9871565.

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Reactions of cyanide with the dimethylplatinum (IV) complexes, [PtMe2(OH) (H20)1.5 n, [PtMe2Br2]n and fac-PtMe2Br(H2O)3+, have been studied, principally by 1H, 13C and 195Pt n.m.r. Cyanide rapidly displaces the ligands trans to the methyl groups. Subsequent reactions cis to the methyl groups occur more slowly with heating, or, for bromo complexes, on ultraviolet irradiation. These substitution reactions compete with reductive elimination of groups from the platinum(IV) compounds to produce platinum(II) products. All attempts to prepare solutions of fac-PtMe2(CN)(H2O)3+ were unsuccessful. Oxida

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47

Zhou, Zhixu, Linwei Li, Ning Yan, Lei Du, Changshan Sun, and Tiemin Sun. "Synthesis, Crystal Structure, Absolute Configuration and Antitumor Activity of the Enantiomers of 5-Bromo-2-chloro-N-(1-phenylethyl)pyridine-3-sulfonamide." Molecules 20, no. 11 (2015): 20926–38. http://dx.doi.org/10.3390/molecules201119740.

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48

Buldurun, Kenan, Emine Tanış, Nevin Turan, Naki Çolak, and Nevin Çankaya. "Solvent effects on the electronic and optical properties of Ni(II), Zn(II), and Fe(II) complexes of a Schiff base derived from 5-bromo-2-hydroxybenzaldehyde." Journal of Chemical Research 45, no. 7-8 (2021): 753–59. http://dx.doi.org/10.1177/1747519821995424.

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In this article, the electronic, optical, and charge transfer properties of a Schiff base ligand prepared using 5-bromo-2-hydroxybenzaldehyde and ethyl 6-acetyl-2-amino-4,5,6,7-tetrahydrothieno[2,3- c]pyridine-3-carboxylate (C19H19BrN2O4S) and its Fe(II) (C19H30BrN2O10SClFe), Ni(II) (C19H28BrN2O9SClNi), and Zn(II) (C19H28BrN2O9SClZn) complexes are described based on different solvents environments and supported by theoretical calculations. Theoretical calculations are carried out using density functional theory (DFT/UB3LYP/LANL2DZ). The optical densities, optical band gaps, and refractive indi

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Çolak, N., A. Karayel, K. Buldurun, and N. Turan. "SYNTHESIS, CHARACTERIZATION, THERMAL, X-RAY, AND DFT ANALYSES OF 6-TERT-BUTYL 3-ETHYL 2-[(3-METHOXY/5-BROMO)-2-HYDROXY AND (3-NITRO/3-METHOXY)BENZYLIDENEAMINO]- 4,5-DIHYDROTHIENO[2,3-C]PYRIDINE-3,6(7H)-DICARBOXYLATE." Journal of Structural Chemistry 62, no. 1 (2021): 37–46. http://dx.doi.org/10.1134/s0022476621010054.

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50

Prachayasittikul, Supaluk, George Doss, and Ludwig Bauer. "Deoxydative substitution of pyridine 1-oxides by thiols. Part XX. Reactions of (2, 3, and 4-phenyl)-, 3-acetamido-, 3-bromo-, 3-acetoxy-, 3-ethoxypyridine 1-oxides with 1-adamantanethiol in acetic anhydride." Journal of Heterocyclic Chemistry 28, no. 4 (1991): 1051–60. http://dx.doi.org/10.1002/jhet.5570280437.

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