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Journal articles on the topic 'Naphthyl ring'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Feng, Qi, Wenhui Huan, Jiali Wang, Jiadan Lu, Guowang Diao, and Yaqi Shan. "Crystal Structures and Optical Properties of Two Novel 1,3,5-Trisubstituted Pyrazoline Derivatives." Crystals 8, no. 12 (2018): 467. http://dx.doi.org/10.3390/cryst8120467.

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Two novel 1,3,5-trisubstituted pyrazoline derivatives—1-acetyl-3-(4-methoxyphenyl)-5-(6-methoxy-2-naphthyl)-pyrazoline (2a) and 1-(4-nitrophenyl)-3-(4-methoxyphenyl)-5-(6-methoxy-2-naphtyl)-pyrazoline (2b)—were synthesized and their structures were determined by single crystal X-ray crystallography. Both of the two crystals exhibit twisted structures due to the large dihedral angles between the pyrazolinyl ring and the aromatic ring at the 5-position (88.09° for 2a and 71.26° for 2b). The optical–physical properties of the two compounds were investigated. The fluorescent emission of 2b arises

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2

Carter, Jennifer, Michael H. Fenwick, Wen-wei Huang, Vladimir V. Popik, and Thomas T. Tidwell. "Addition of the nitroxyl radical TEMPO to 1-naphthylketene: formation of an unusual adduct." Canadian Journal of Chemistry 77, no. 5-6 (1999): 806–9. http://dx.doi.org/10.1139/v99-043.

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1-Naphthylketene (2), generated by thermal Wolff-rearrangement, is trapped in situ by 2,2,6,6-tetramethylpiridinyloxy radical (TEMPO, TO·) to form the adduct 1-naphthCH(OT)CO2T (4), whose structure is confirmed by an X-ray determination. The 1H NMR spectrum of 4 displays three CH3 groups with very high field chemical shifts (δ 0.10-0.47), and this is attributed to the location of these groups in the shielding region above the π system of the naphthyl ring. At -40°C, doubling of most of the 1H NMR signals occurs, and this is attributed to a freezing out of two conformations differing by rotatio

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3

Markovic, O. T., D. S. Young, and N. S. Markovic. "Quinidine-induced inhibition of leukocyte esterases." Clinical Chemistry 34, no. 3 (1988): 518–24. http://dx.doi.org/10.1093/clinchem/34.3.518.

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Abstract We have demonstrated the feasibility of a system based on image processing to measure enzyme activity inside morphologically classified individual cells. When used in this system, quinidine inhibited naphthol AS-D chloroacetate esterase in polymorphonuclear neutrophils and alpha-naphthyl acetate esterase and alpha-naphthyl butyrate esterase in monocytes. These effects were dependent on the duration of exposure and on drug concentration. Dose-effect relationships were established and the concentration at which 50% inhibition (ID-50) occurred was used as a reference point to compare the

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4

Abdel-Hay, Karim M., Tarek S. Belal, Younis Abiedalla, et al. "Gas Chromatography–Mass Spectrometry (GC–MS) and Gas Chromatography–Infrared (GC–IR) Analyses of the Chloro-1-n-pentyl-3-(1-naphthoyl)-Indoles: Regioisomeric Cannabinoids." Applied Spectroscopy 73, no. 4 (2018): 433–43. http://dx.doi.org/10.1177/0003702818809998.

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The analytical differentiation of the indole ring regioisomeric chloro-1- n-pentyl-3-(1-naphthoyl)-indoles is described in this report. The regioisomeric chloroindole precursor compounds, N- n-pentyl chloroindole synthetic intermediates, and the target chloro-substituted naphthoylindoles showed the equivalent gas chromatographic elution order based on the position of chlorine substitution on the indole ring. The regioisomeric chloro-1- n-pentyl-3-(1-naphthoyl)-indoles yield electron ionization mass spectra having equivalent major fragments resulting from cleavage of the groups attached to the

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5

Selesi, Draženka, Nico Jehmlich, Martin von Bergen, et al. "Combined Genomic and Proteomic Approaches Identify Gene Clusters Involved in Anaerobic 2-Methylnaphthalene Degradation in the Sulfate-Reducing Enrichment Culture N47." Journal of Bacteriology 192, no. 1 (2009): 295–306. http://dx.doi.org/10.1128/jb.00874-09.

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ABSTRACT The highly enriched deltaproteobacterial culture N47 anaerobically oxidizes the polycyclic aromatic hydrocarbons naphthalene and 2-methylnaphthalene, with sulfate as the electron acceptor. Combined genome sequencing and liquid chromatography-tandem mass spectrometry-based shotgun proteome analyses were performed to identify genes and proteins involved in anaerobic aromatic catabolism. Proteome analysis of 2-methylnaphthalene-grown N47 cells resulted in the identification of putative enzymes catalyzing the anaerobic conversion of 2-methylnaphthalene to 2-naphthoyl coenzyme A (2-naphtho

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6

Duval, Maryne, Charlie Blons, Sonia Mallet-Ladeira, et al. "Cu-Catalyzed P–C bond formation/cleavage: straightforward synthesis/ring-expansion of strained cyclic phosphoniums." Dalton Transactions 49, no. 37 (2020): 13100–13109. http://dx.doi.org/10.1039/d0dt03059g.

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7

Raja, Rajamani, Mani Jayanthi, Perumal Rajakumar, and A. SubbiahPandi. "Crystal structure of 2,2′-bis[(2-chlorobenzyl)oxy]-1,1′-binaphthalene." Acta Crystallographica Section E Crystallographic Communications 71, no. 9 (2015): o637—o638. http://dx.doi.org/10.1107/s2056989015014322.

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In the title binaphthyl compound, C34H24Cl2O2, the dihedral angle between the two naphthyl ring systems (r.m.s. deviations = 0.016 and 0.035 Å) is 76.33 (8)°. The chlorophenyl rings make dihedral angles of 58.15 (12) and 76.21 (13)° with the naphthyl ring to which they are linked. The dihedral angle between the planes of the two chlorophenyl rings is 27.66 (16)°. In the crystal, C—H...O hydrogen bonds link molecules into chains propagating along [1-10]. The chains are linked by C—H...π interactions, forming a three-dimensional framework.

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8

Ji, Lei, Yun-Yan Kuang, Fen-Er Chen, and Min-Qin Chen. "2-(Cyclopentylsulfanyl)-6-(1-naphthoyl)pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1485—o1487. http://dx.doi.org/10.1107/s1600536806009378.

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In the structure of the title compound, C20H18N2O2S, the carbonyl group, the naphthyl ring system and the cyclopentyl ring are not in the plane of the pyrimidinyl ring. In the crystal structure, pairs of molecules are connected into dimers via N—H...O hydrogen bonding

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9

Zukerman-Schpector, Julio, Karinne E. Prado, Luccas L. Name, Rodrigo Cella, Mukesh M. Jotani, and Edward R. T. Tiekink. "2-[(4-Chlorophenyl)selanyl]-3,4-dihydro-2H-benzo[h]chromene-5,6-dione: crystal structure and Hirshfeld analysis." Acta Crystallographica Section E Crystallographic Communications 73, no. 6 (2017): 918–24. http://dx.doi.org/10.1107/s2056989017007605.

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The title organoselenium compound, C19H13ClO3Se {systematic name: 2-[(4-chlorophenyl)selanyl]-2H,3H,4H,5H,6H-naphtho[1,2-b]pyran-5,6-dione}, has the substituted 2-pyranyl ring in a half-chair conformation with the methylene-C atom bound to the methine-C atom being the flap atom. The dihedral angle between the two aromatic regions of the molecule is 9.96 (9)° and indicates a step-like conformation. An intramolecular Se...O interaction of 2.8122 (13) Å is noted. In the crystal, π–π contacts between naphthyl rings [inter-centroid distance = 3.7213 (12) Å] and between naphthyl and chlorobenzene ri

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10

Raphael Karikachery, Alice, Mehdi Masjedi, and Paul R. Sharp. "Thermal and Photochemical Ring-Bromination in Naphthyl-, Naphthdiyl-, and Dicarboximideperyl-Platinum Complexes." Organometallics 34, no. 9 (2015): 1635–42. http://dx.doi.org/10.1021/om501322f.

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11

Carrilho, Rui M. B., Mariette M. Pereira, Teresa M. R. Maria, M. Ermelinda S. Eusébio, and V. H. Rodrigues. "Crystal structure of (R)-2′-benzyloxy-[1,1′-binaphthalen]-2-yl trifluoromethanesulfonate." Acta Crystallographica Section E Structure Reports Online 70, no. 10 (2014): o1096—o1097. http://dx.doi.org/10.1107/s1600536814019096.

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In the title compound, C28H19F3O4S, a new 2′-benzyloxy (R)-BINOL derivative containing a trifluoromethanesulfonate group in the 2-position, the planes of the two naphthyl ring systems (r.m.s. deviations = 0.012 and 0.019 Å) are at an angle of 73.36 (2)°, and the planes of the benzyl ring and the naphthyl ring system bound to the ether O atom are at an angle of 75.67 (4)°. In the crystal, molecules are linkedviaC—H...F hydrogen bonds, forming chains propagating along [100]. The chains are linkedviaa weak C—F...π interaction and weak π–π interactions [shortest inter-centroid distance = 3.9158 (1

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12

Vijayakumar, Vinodhkumar, Gunther H. Peters, M. Suresh, Raghunathan Raghavachary, and G. Jagadeesan. "Methyl 1-ethyl-3′-[hydroxy(naphthalen-1-yl)methyl]-1′-methyl-2-oxospiro[indoline-3,2′-pyrrolidine]-3′-carboxylate." Acta Crystallographica Section E Structure Reports Online 70, no. 5 (2014): o540. http://dx.doi.org/10.1107/s1600536814007065.

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In the title compound, C27H28N2O4, the pyrrolidine ring adopts a twist conformation. The plane of the indole ring is almost perpendicular to that of the pyrrolidine ring, making a dihedral angle of 88.50 (6)°. The planes of the naphthyl ring system and the pyrrolidine ring are tilted by an angle of 55.86 (5)°. The molecular conformation is stabilized by intramolecular O—H...O and O—H...N hydrogen bonds.

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13

Zhang, Yuan, Yong Hua Li, Min Min Zhao, De Hong Wu, and Rong Yang. "1,1′-(2-Thienylmethylene)di-2-naphthol ethyl acetate solvate." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1259. http://dx.doi.org/10.1107/s1600536809016559.

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In the title compound, C25H18O2S·C4H8O2, there are intermolecular O—H...O hydrogen bonds between the main molecule and the solvent molecule. The thiophene ring is oriented at dihedral angles of 70.87 (7) and 75.36 (4)° with respect to the mean planes of the two naphthyl ring systems.

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14

Chauhan, Ashok K. S., Anamika, Ramesh C. Srivastava, and Andrew Duthie. "Bis(1-naphthyl) telluride." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (2007): o4386. http://dx.doi.org/10.1107/s160053680705091x.

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Yellow crystals of the title compound, C20H14Te, were obtained serendipitously in an attempt to recrystallize the reduction product of (1-C10H7)[(CH(Me)COC6H5)]TeCl2 from dichloromethane. The molecule exhibits an angular geometry with almost equal Te—Caryl bonds and a C—Te—C angle close to values observed for other diaryl tellurides. One of the aromatic ring systems lies in the C—Te—C plane and the other is oriented at 76.81 (6)°, giving an almost T-shaped conformation that is compatible with the steric demand of 1-naphthyl ligands.

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15

Mahon, Andrew B., Donald C. Craig, and Andrew C. Try. "1,1′-Methylenebis(naphthalen-2-amine) methanol solvate." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (2007): o4341. http://dx.doi.org/10.1107/s1600536807050131.

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16

Tang, Chunbao. "2-Chloro-N′-[(E)-(2-methoxy-1-naphthyl)methylene]benzohydrazide." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1254. http://dx.doi.org/10.1107/s1600536809016936.

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In the molecule of the title Schiff base compound, C19H15ClN2O2, the dihedral angle between the benzene ring and naphthyl ring system is 77.1 (2)°. In the crystal structure, centrosymmetrically related molecules are linked into dimers through pairs of intermolecular N–H...O hydrogen bonds, generating rings of graph setR22(8).

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17

Nguyen, Nhi Ngoc Tuyet, Hanif Mubarok, Taehwan Lee, Thi Quyen Tran, Jaehoon Jung, and Min Hyung Lee. "Highly emissive planarized B,N-diarylated benzonaphthoazaborine compounds for narrowband blue fluorescence." RSC Advances 12, no. 46 (2022): 29892–99. http://dx.doi.org/10.1039/d2ra05163j.

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The incorporation of a naphthyl ring into the azaborine core led to blue to sky-blue fluorescence with unitary photoluminescence quantum yields, narrow full width at half maximum values, and small Stokes shifts.

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18

Brinda, Rajeev Mudakavi, Deepak Chopra, M. Srinivas Murthy, and T. N. Guru Row. "4-Methyl-2,6-bis(2-naphthylmethylene)cyclohexan-1-one." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (2007): o4494. http://dx.doi.org/10.1107/s1600536807053032.

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The molecular skeleton of the title molecule, C29H24O, has a `bird-like' general conformation. The naphthyl units (`wings') make a dihedral angle of 46.1 (1)°. The central cyclohexanone ring adopts an envelope conformation.

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19

Fun, Hoong-Kun, Kullapa Chanawanno, and Suchada Chantrapromma. "(E)-1-Methyl-4-[2-(2-naphthyl)vinyl]pyridinium iodide." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1406—o1407. http://dx.doi.org/10.1107/s1600536809019114.

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In the title compound, C18H16N+·I−, the cation is disordered over two orientations related by a 180° rotation about its long axis with occupancies of 0.554 (7) and 0.446 (7). Both disorder components exist in anEconfiguration. The dihedral angle between the pyridinium ring and the naphthalene ring system is 4.7 (6)° in the major disorder component and 1.6 (8)° in the minor component. In the crystal structure, centrosymmetrically related cations are stacked along theaaxis, with significant π–π interactions between the pyridinium ring and the naphthalene ring system [centroid-centroid distance =

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20

Kikuchi, Takuya, Saori Gontani, Kyohei Miyanaga, Takaaki Kurata, Yoshiki Akatani, and Shinya Matsumoto. "Crystal structure of benzyl 2-naphthyl ether, a sensitiser for thermal paper." Acta Crystallographica Section E Crystallographic Communications 75, no. 2 (2019): 242–45. http://dx.doi.org/10.1107/s2056989019000690.

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The title compound [systematic name: 2-(benzyloxy)naphthalene], C17H14O, which is used as a sensitiser for thermal paper, has a twisted conformation with a dihedral angle of 48.71 (12)° between the phenyl ring and the naphthyl ring system. In the crystal, one molecule interacts with six neighbouring molecules via intermolecular C—H...π interactions to form a herringbone molecular arrangement.

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21

Senadheera, Sanjeewa N., Abraham L. Yousef, and Richard S. Givens. "Photorelease of phosphates: Mild methods for protecting phosphate derivatives." Beilstein Journal of Organic Chemistry 10 (August 29, 2014): 2038–54. http://dx.doi.org/10.3762/bjoc.10.212.

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We have developed a new photoremovable protecting group for caging phosphates in the near UV. Diethyl 2-(4-hydroxy-1-naphthyl)-2-oxoethyl phosphate (14a) quantitatively releases diethyl phosphate upon irradiation in aq MeOH or aq MeCN at 350 nm, with quantum efficiencies ranging from 0.021 to 0.067 depending on the solvent composition. The deprotection reactions originate from the triplet excited state, are robust under ambient conditions and can be carried on to 100% conversion. Similar results were found with diethyl 2-(4-methoxy-1-naphthyl)-2-oxoethyl phosphate (14b), although it was signif

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22

Hao, Yu-Mei. "1-[(2-Anilinoethyl)iminiomethyl]-2-naphtholate." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1400. http://dx.doi.org/10.1107/s1600536809019096.

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The title Schiff base compound, C19H18N2O, was prepared by the reaction of equimolar quantities of 2-hydroxy-1-naphthaldehyde withN-phenylethane-1,2-diamine in a methanol solution. The molecule adopts a zwitterionic conformation with the naphthyl OH group deprotonated and the imine N atom protonated. An intramolecular N—H...O hydrogen bond forms between them. The dihedral angle between the benzene ring and the naphthyl system is 86.9 (2)°. In the crystal structure, molecules are linked through intermolecular N—H...O hydrogen bonds, forming chains running along thebaxis.

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23

Wei, Hong-Xia, Jing Zhu, Ming Li, Jian-qiang Wang, and Cheng Guo. "2-Amino-4-(2-chlorophenyl)-6-(naphthalen-1-yl)pyridine-3-carbonitrile." Acta Crystallographica Section E Structure Reports Online 68, no. 6 (2012): o1839. http://dx.doi.org/10.1107/s1600536812020909.

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In the title compound, C22H14ClN3, prepared by a one-pot reaction under microwave irradiation, the dihedral angles between the central pyridine ring and the pendant naphthyl and chlorobenzene ring systems are 49.2 (2) and 58.2 (3)°, respectively. In the crystal, inversion dimers linked by pairs of N—H...N hydrogen bonds generate R 2 2(8) loops. The pyridine N atom is the acceptor.

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24

Dempster-Rivett, Kieran J., Lyndsay Main, Brian K. Nicholson, and William A. Denny. "2-(1,4-Dioxo-1,4-dihydro-2-naphthyl)-2-methylpropanoic acid." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (2007): o4251. http://dx.doi.org/10.1107/s1600536807048131.

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The sterically crowded title compound, C14H12O4, crystallizes as centrosymmetric hydrogen-bonded dimers involving the carboxyl groups. The naphthoquinone ring system is folded by 11.5 (1)° about a vector joining the 1,4-C atoms, and the quinone O atoms are displaced from the ring plane, presumably because of steric interactions with the bulky substituent.

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25

Thorup, Niels, Heinz-Josef Deussen, Klaus Bechgaard, and Thomas Bjørnholm. "(S)-2,2′-Diethoxy-1,1′-binaphthyl." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1342—o1343. http://dx.doi.org/10.1107/s1600536806007872.

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The title molecule, C24H22O2, contains two planar naphthyl ring systems. The torsion angle around the the central C—C bond is 111.3 (2)° implying a transoid conformation with respect to the two ethoxy substituents. Only weak intermolecular interactions are present in the crystal structure.

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26

Espinosa Leija, Armando, Guadalupe Hernández, Sandra Cruz, Sylvain Bernès, and René Gutiérrez. "1,3-Bis{(+)-(S)-[1-(1-naphthyl)ethyl]iminomethyl}benzene dichloromethane solvate." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1316. http://dx.doi.org/10.1107/s1600536809017528.

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In the title compound, C32H28N2·CH2Cl2, the complete Schiff base and solvent molecules are both generated by crystallographic twofold axes, with the two C atoms of the former and the C atom of the latter lying on the rotation axis. The central benzene ring is substituted with two chiral groups including imine functionalities, with the commonEconfiguration. The dihedral angle between the central benzene ring and the terminal naphthalene ring is 45.42 (9)° and that between the two naphthalene rings is 89.16 (8)°. The conformation of the Schiff base allows solvent molecules to fill the voids in t

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27

Yathirajan, H. S., Anil N. Mayekar, B. K. Sarojini, B. Narayana, and Michael Bolte. "7-Diethylamino-3-[(2Z)-3-(6-methoxy-2-naphthyl)prop-2-enoyl]-2H-chromen-2-one." Acta Crystallographica Section E Structure Reports Online 63, no. 3 (2007): o1140—o1141. http://dx.doi.org/10.1107/s1600536807004771.

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The geometric parameters of the title molecule, C27H25NO4, are in the usual ranges. The central C=C double bond is trans configured, with the two C atoms slightly twisted out of the plane of the naphthyl group. The dihedral angle between the two fused ring systems is 40.90 (4)°.

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28

Tao, Minli, Dongzhi Liu, Minghua Zhang, Xueqin Zhou, and Luhai Li. "Synthesis and spectral property study of porphyrin-anthraquinone dyads bonded through azo." Journal of Porphyrins and Phthalocyanines 14, no. 03 (2010): 219–26. http://dx.doi.org/10.1142/s1088424610001933.

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To determine if the dihedral angle between the phenyl group and the porphyrin ring in the meso-phenyl porphyrin (H2TPP) could be adjusted by selective substitution of the naphthyl group for phenyl groups, novel dyads with a free-base porphyrin donor and anthraquinone acceptor linked by a rigid azo bond were synthesized and their spectral properties were investigated in detail. The Soret absorption band of dyads with meso-naphthyl groups in porphyrin shows 5–7 nm red shift as compared to the corresponding raw materials due to the introduction of the anthraquinone moiety. Fluorescence from the p

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29

Ravindra, S. Dhivare, and S. Rajput Shankarsing. "SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF FIVE MEMBERED CYCLIC IMIDE DERIVATIVES OF MONO, DI AND TRI SUBSTITUTED AROMATIC AMINES AND NAPTHYL AMINE." World Journal of Pharmaceutical Research 4, no. 6 (2019): 1650–58. https://doi.org/10.20959/wjpr20156-3632.

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The five-membered cyclic imide derivatives were prepared by reacting succinic anhydride with substituted aromatic amines and naphthyl amine to get 3-(N-phenyl carbamoyl) propanoic acid and 3-(N-napthylcarbamoyl) propanoic acid. These intermediates underwent ring closer with acetyl chloride furnished five-membered cyclic imides derivatives. All these derivatives were screened for antimicrobial activities.

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30

Cambie, Richard C., Carrie C. Liu, Clifford E. F. Rickard, and Peter S. Rutledge. "Skeletal Rearrangements of Ring C Aromatic Diterpenoids." Australian Journal of Chemistry 51, no. 7 (1998): 605. http://dx.doi.org/10.1071/c97198.

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The structure of a naphthalene derivative obtained by rearrangement of 13-methoxytotara-5,8,11,13-tetraen-7α-ol (2) has been revised to 5-(5′-isopropyl-6′-methoxy-2′-methyl-1′-naphthyl)-2-methylpent-2-ene (7). A minor oxidation product of 13-methoxytotara-8,11,13-triene (4) has been identified as 4-methoxy-3,3-dimethyl-7-(1′,3′,3′-trimethyl-2′-oxocyclohexanyl)isobenzofuran-1(3H)-one (16) and its structure confirmed by X-ray crystallography. Methyl 12-methoxypodocarpa-8,11,13-trien-19-oate (12) has been converted into an intermediate used in the synthesis of the linear diterpenoid umbrosone [3-

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31

Li, Hongqi, A. N. Mayekar, B. Narayana, H. S. Yathirajan, and William T. A. Harrison. "(±)-Ethyl 6-(6-methoxy-2-naphthyl)-4-(4-methylphenyl)-2-oxocyclohex-3-ene-1-carboxylate." Acta Crystallographica Section E Structure Reports Online 65, no. 6 (2009): o1186. http://dx.doi.org/10.1107/s1600536809016341.

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In the title compound, C27H26O4, the dihedral angle between the naphthalene ring system and the benzene ring is 73.10 (5)°. In the crystal, a weak C—H...O interaction occurs. Two C—H groups of the cyclohexene ring are disordered over two sets of sites in a 0.796 (5):0.204 (5) ratio, which corresponds to partial overlap of the two enantiomeric molecules.

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32

Vimala, G., J. Haribabu, S. Aishwarya, R. Karvembu, and A. SubbiahPandi. "Crystal structure ofN-[(naphthalen-1-yl)carbamothioyl]cyclohexanecarboxamide." Acta Crystallographica Section E Crystallographic Communications 71, no. 7 (2015): o508—o509. http://dx.doi.org/10.1107/s2056989015011950.

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The title compound, C18H20N2OS, displays whole-molecule disorder over two adjacent sets of sites with an occupancy ratio of 0.630 (11):0.370 (11). In each disorder component, the cyclohexyl ring shows a chair conformation with the exocyclic C—C bond in an equatorial orientation. The dihedral angles between the cyclohexyl ring (all atoms) and the naphthyl ring system are 36.9 (6) for the major component and 20.7 (12)° for the minor component. Each component features an intramolecular N—H...O hydrogen bond, which closes anS(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S hyd

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33

Srividya, J., D. Reuben Jonathan, B. K. Revathi, and G. Anbalagan. "Crystal structure of (E)-1-(1-hydroxynaphthalen-2-yl)-3-(2,3,4-trimethoxyphenyl)prop-2-en-1-one." Acta Crystallographica Section E Crystallographic Communications 71, no. 8 (2015): o610—o611. http://dx.doi.org/10.1107/s2056989015013870.

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The title compound, C22H20O5, is composed of a hydroxynaphthyl ring and a trimethoxyphenyl ring [the planes of which are inclined to one another by 21.61 (10)°] bridged by an unsaturated prop-2-en-1-one group. The mean plane of the prop-2-en-1-one group [–C(=O)—C=C–] is inclined to that of the naphthyl system and benzene rings by 3.77 (14) and 18.01 (16)°, respectively. There is an intramolecular O—H...O hydrogen bond present forming anS(6) ring motif. In the crystal, inversion-related molecules are linked by a slipped-parallel π–π interaction [intercentroid distance = 3.8942 (13) Å, interplan

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Kiwada, Tatsuto, Hiromu Katakasu, Serina Okumura, and Akira Odani. "Characterization of platinum(II) complexes exhibiting inhibitory activity against the 20S proteasome." Royal Society Open Science 7, no. 8 (2020): 200545. http://dx.doi.org/10.1098/rsos.200545.

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Proteasome inhibitors are useful for biochemical research and clinical treatment. In our previous study, we reported that the 4N-coordinated platinum complexes with anthracenyl ring and heterocycle exhibited proteasome-inhibitory activity. In the present study, the structure–activity relationships and characterization of these complexes were determined for the elucidation of the role of aromatic ligands. Lineweaver–Burk analysis revealed that the chemical structure of heterocycles affects the binding mode of platinum complexes. Platinum complexes with anthracenyl ring and pyridine showed compe

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Guo, Yanhao, Ruimin Yu, Tao Zhang, et al. "Synthesis and Biological Evaluation of Novel Biased Mu-Opioid Receptor Agonists." Molecules 29, no. 13 (2024): 2961. http://dx.doi.org/10.3390/molecules29132961.

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This study explored the potential of a series of PZM21 analogues for pain treatment. Specifically, the hydroxyphenyl ring of PZM21 was replaced with a naphthyl ring, the thienyl ring was substituted with either a phenyl ring or furan rings, and the essential dimethylamine and urea groups were retained. These compounds aimed to enhance safety and minimize the adverse effects associated with opioid drugs. The research findings suggest that compound 6a does not induce β-arrestin recruitment at low-nanomolar concentrations but exhibits significant analgesic effects in established mouse models. Com

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Varghese, Beena, Saleh N. Al-Busafi, Fakhr Eldin O. Suliman, and Salma Al-Kindy. "Study on the Reactivity of Amino Acid Chemosensor, NPFNP, with Ethanol: Structural Elucidation through Single Crystal XRD and DFT Calculations." Sultan Qaboos University Journal for Science [SQUJS] 22, no. 1 (2017): 16. http://dx.doi.org/10.24200/squjs.vol22iss1pp16-28.

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A novel ethoxy derivative of an amino acid chemosensor, 3-naphthyl-1-phenyl-5-(2ʹ-fluoro-5ʹ-nitrophenyl)-2-pyrazoline (NPFNP), has been synthesized and characterized by different spectroscopic methods. A single crystal of the ethoxy derivative, 3-naphthyl-1-phenyl-5-(2ʹ-ethoxy-5ʹ-nitrophenyl)-2-pyrazoline NPENP, has been obtained and characterized. The structure holds interest as it carries biologically active pyrazoline as a central ring attaching to electron donating and withdrawing substituents. The major motivation for this work was to gain detailed insight into the structural parameters o

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Petrillo, Giovanni, Michele Mancinelli, Angela Pagano, Emanuela Marotta, Andrea Mazzanti, and Cinzia Tavani. "Stereodynamic Analysis of New Atropisomeric 4,7-Di(naphthalen-1-yl)-5,6-dinitro-1H-indoles." Synlett 29, no. 16 (2018): 2161–66. http://dx.doi.org/10.1055/s-0037-1609908.

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A series of atropisomeric molecules containing the indole ring and two stereogenic axes were prepared. The four atropisomers were resolved by enantioselective HPLC. The rotational barriers of the indole–naphthyl axes were evaluated by means of kinetic analysis either by NMR or enantioselective HPLC. The absolute configuration of the atropisomers was determined by a combination of X-ray spectroscopy and TD-DFT simulation of electronic circular dichroism spectra.

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38

K. Jassim, Ibtisam, Sawsan S. Harth, Rua M. Dhedan, and Ali Obais Abd. "Synthesis and study the biological activity of some six, five and fused ring heteroatome systems derived from 2-mercapto benzothiazole." Tikrit Journal of Pharmaceutical Sciences 8, no. 1 (2023): 96–105. http://dx.doi.org/10.25130/tjphs.2012.8.1.12.96.105.

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In this paper ,new series of 2-hydrazino benzothiazole [1], 2-N-benzothiazole-N`-phenyl hydrazine carboxamide [2], 2-N-[(3)-N`-phenyl-5-(p-bromophenyl)-2`-hydroxy-1,3-oxazolin-2`-yl] benzothiazol hydrazine [3] , 2-N-benzothiazole-N`-1-naphthyl hydrazine carboxamide [4], 2-N-[(3`)-N`-(1-naphthyl)-5`-(p-bromo phenyl)-2`-hydroxy-1,3-oxazolin-2`-yl)] benzothiazol hydrazine [5], of 2-thiaacetic acid benzothiazole [6] ,2-thiaacetyl chloride benzothiazole [7], 5-amino-2-mercapto-1,3,4-thiadiazole [8], of 2-mercapto-[5-acetamid thiamethyl benzothiazol]-1,3,4-thiadiazole [9], 2-phenyl-5-chloromethyl-1,

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39

Shahid, Muhammad, Muhammad Nawaz Tahir, Muhammad Salim, Munawar Ali Munawar, and Hazoor Ahmad Shad. "1-{[(E)-(4-{[(2Z)-2,3-Dihydro-1,3-thiazol-2-ylidene]sulfamoyl}phenyl)iminiumyl]methyl}naphthalen-2-olate." Acta Crystallographica Section E Crystallographic Communications 71, no. 6 (2015): o421—o422. http://dx.doi.org/10.1107/s2056989015009640.

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In the title zwitterionic compound, C20H15N3O3S2, the 2-hydroxynaphthalene-1-carbaldehyde groupA, the anilinic unitBand the 1,3-thiazol-2(3H)-imine groupCare each approximately planar with r.m.s. deviation of 0.0721, 0.0412 and 0.0125 Å, respectively. The dihedral angles betweenA/B,A/CandB/Care 24.70 (10), 79.97 (7) and 83.14 (6)°, respectively. There is an intramolecularS(6) motif involving the imine N—H and the naphtholate O atom. In the crystal, inversion-related molecules form dimers as a result of N—H...N and N—H...O hydrogen bonds withR22(8) andR12(4) motifs, respectively. Weak π–π inter

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Enamullah, Mohammed, A. K. M. Royhan Uddin, Anne-Christine Chamayou та Christoph Janiak. "Syntheses, Spectroscopy And Crystal Structures Of (R)-N-(1-Aryl-Ethyl)Salicylaldimines And [Rh{(R)-N-(1-Aryl-Ethyl)Salicylaldiminato}(η4-Cod)] Complexes". Zeitschrift für Naturforschung B 62, № 6 (2007): 807–17. http://dx.doi.org/10.1515/znb-2007-0609.

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Condensation of salicylaldehyde with enantiopure (R)-(1-aryl-ethyl)amines yields the enantiopure Schiff bases (R)-N-(1-aryl-ethyl)salicylaldimine (HSB*; aryl = phenyl, 2-methoxyphenyl, 3- methoxyphenyl, 4-methoxyphenyl (4), 4-bromophenyl (5), 2-naphthyl). These Schiff bases readily react with dinuclear (acetato)(η4-cycloocta-1,5-diene)rhodium(I), [Rh(μ-O2CMe)(η4-cod)]2, to afford the mononuclear complexes, cyclooctadiene-((R)-N-(1-aryl-ethyl)salicylaldiminato-κ2N,O)- rhodium(I), [Rh(SB∗)(η4-cod)] (SB* = deprotonated chiral Schiff base = salicylaldiminate; aryl = phenyl (7), 2-methoxyphenyl, 4-

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Zhang, Miao, та Xu-Jie Xiong. "Crystal structure of bis[1-(naphthalen-1-ylmethyl)pyridinium] bis(2,2-dicyanoethene-1,1-dithiolato-κ2S,S′)nickelate(II)". Acta Crystallographica Section E Structure Reports Online 70, № 8 (2014): 115–17. http://dx.doi.org/10.1107/s1600536814017012.

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A new ion-pair complex, (C16H14N)2[Ni(C4N2S2)2] or (1-NaMePy)2[Ni(imnt)2], where 1-NaMePy is 1-(4-naphthylmethylene)pyridinium and imnt is 2,2-dicyanoethene-1,1-dithiolate, was obtained by the direct reaction of NiCl2, K2imnt and (1-NaMePy)+Br−in H2O. The asymmetric unit contains a [1-NaMePy]+cation and one half of an Ni(imnt)22−anion. The NiIIion lies on an inversion centre and adopts a square-planar configuration with Ni—S bond lengths of 2.200 (1) and 2.216 (1) Å. In the [1-NaMePy]+cation, the naphthyl ringsystem and the pyridinium ring make a dihedral angle of 90.0 (2)°. In the crystal, C—

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42

Ohba, Yasuhiro, Kanji Kubo, and Tadamitsu Sakurai. "Sensitized ring-opening reactions of 3-(1-naphthyl)-2-(1-naphthalenemethyl) oxaziridine." Journal of Photochemistry and Photobiology A: Chemistry 113, no. 1 (1998): 45–51. http://dx.doi.org/10.1016/s1010-6030(97)00313-4.

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Winkelhaus, Daniel, Beate Neumann, and Norbert W. Mitzel. "An Intramolecular Boron Nitrogen Lewis Acid Base Pair on a Rigid Naphthyl Backbone." Zeitschrift für Naturforschung B 67, no. 6 (2012): 589–93. http://dx.doi.org/10.5560/znb.2012-0091.

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The reaction of (C6F5)2BCl with 8-lithio-N,N-dimethyl-1-naphthylamine (1) afforded the fivemembered ring system 8-bis(pentafluorophenyl)boryl-N,N-dimethyl-1-naphthylamine (2) with an intramolecular dative B-N bond. The compound was characterised by elemental analysis, NMR spectroscopy and single-crystal X-ray diffraction.

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Jotani, Mukesh M., P. Iniyavan, V. Vijayakumar, S. Sarveswari, Yee Seng Tan, and Edward R. T. Tiekink. "12-(3,4,5-Trimethoxyphenyl)-2,3,4,12-tetrahydro-1H-5-oxatetraphen-1-one: crystal structure and Hirshfeld surface analysis." Acta Crystallographica Section E Crystallographic Communications 72, no. 6 (2016): 809–14. http://dx.doi.org/10.1107/s2056989016007775.

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In the title compound, C26H24O5, the pyran ring has a flattened-boat conformation, with the 1,4-related ether O and methine C atoms lying 0.1205 (18) and 0.271 (2) Å, respectively, above the least-squares plane involving the doubly bonded C atoms (r.m.s deviation = 0.0208 Å). An envelope conformation is found for the cyclohexene ring, with the flap atom being the middle methylene C atom, lying 0.616 (2) Å out of the plane defined by the remaining atoms (r.m.s. deviation = 0.0173 Å). The fused four-ring system is approximately planar, with the dihedral angle between the least-squares planes thr

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Vilaça, Helena, André Carvalho, Tarsila Castro, et al. "Unveiling the Role of Capping Groups in Naphthalene N-Capped Dehydrodipeptide Hydrogels." Gels 9, no. 6 (2023): 464. http://dx.doi.org/10.3390/gels9060464.

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Self-assembled peptide-based hydrogels are archetypical nanostructured materials with a plethora of foreseeable applications in nanomedicine and as biomaterials. N-protected di- and tri-peptides are effective minimalist (molecular) hydrogelators. Independent variation of the capping group, peptide sequence and side chain modifications allows a wide chemical space to be explored and hydrogel properties to be tuned. In this work, we report the synthesis of a focused library of dehydrodipeptides N-protected with 1-naphthoyl and 2-naphthylacetyl groups. The 2-naphthylacetyl group was extensively r

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Wang, Li Qin, Shou Zhi Pu, and Liu Shui Yan. "Properties and Application of a Novel Diarylethene Photochromism Material with a Naphthyl Ring." Applied Mechanics and Materials 164 (April 2012): 235–38. http://dx.doi.org/10.4028/www.scientific.net/amm.164.235.

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A new unsymmetrical photochromic diarylethene 1-(2-methylnaphthyl)-2-(2-n-butyl-5-formyl-3-thienyl) perfluorocyclopentene (1o), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films, and the fluorescence spectra of diarylethene 1o were investigated. The diarylethene can be potentially used as holographic optical recording medium

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Buist, Peter H., та Dale M. Marecak. "Use of aromatic thia fatty acids as active site mapping agents for a yeast Δ9 desaturase". Canadian Journal of Chemistry 72, № 1 (1994): 176–81. http://dx.doi.org/10.1139/v94-027.

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The Δ9 desaturating system of Saccharomyces cerevisiae can sulfoxidize methyl S-benzyl-8-mercaptooctanoate as well as its naphthyl analogue but the corresponding isomers where sulfur is bonded to the aromatic ring do not function as substrates. We have accounted for these results in terms of a conformational model. We have also accumulated some evidence that suggests that dealkylation of these thia analogues does not compete with sulfoxidation. Our recently discovered chiral shift reagent (S)-(+)-α-methoxyphenylacetic acid (MPAA) can be used to determine the optical purity and absolute configu

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Hofmann, Hans, Herbert Fischer, and Markus de Vries. "Heterocyclische Siebenring-Verbindungen, XXXVII. Synthese und thermische Umlagerung von 1-Methyl- l -benzothiepinium-tetrafluoroborat / Heterocyclic Seven-Membered Ring Compounds, XXXVII. Synthesis and Thermal Rearrangement of 1 -Methyl-1-benzothiepinium Tetrafluoroborate." Zeitschrift für Naturforschung B 45, no. 11 (1990): 1573–76. http://dx.doi.org/10.1515/znb-1990-1119.

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Reaction of 1-benzothiepine (4), whose synthesis has been improved, with trimethyloxonium tetrafluoroborate yields 1-methyl-1-benzothiepinium tetrafluoroborate (5). Compound 5 rearranges to methyl 1-naphthyl sulfide (6) on heating in acetonitrile. The reaction rate 5 → 6 was determined at one temperature (75°C).

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Haratipour, Pouya, Maryam Zangi, Mahshid Yaghoubi, et al. "Abstract 4481: Enhancing AOH1996 through structure activity relationship exploration for caPCNA inhibition." Cancer Research 84, no. 6_Supplement (2024): 4481. http://dx.doi.org/10.1158/1538-7445.am2024-4481.

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Abstract Recently, we have developed AOH1996, a small molecule PCNA ligand currently in phase I clinical trial, designed to selectively inhibit the functions of cancer-associated PCNA (caPCNA). Seeking to enhance the potency and selectivity of AOH1996, we conducted an exhaustive Structure-Activity-Relationship (SAR) investigation. Over 100 analogues of AOH1996 were synthesized, systematically modifying its three main components: the naphthyl group, glycine linker, and diphenyl ether. The glycine linker underwent substitution with various natural and unnatural amino acids, while the 1-naphthyl

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Listunov, Dymytrii, Valérie Maraval, Nathalie Saffon-Merceron, et al. "On terminal alkynylcarbinols and derivatization thereof." French-Ukrainian Journal of Chemistry 3, no. 1 (2015): 21–28. http://dx.doi.org/10.17721/fujcv3i1p21-28.

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The chemistry of three prototypes of secondary alkynylcarbinols (ACs), recently highlighted as challenging targets in anti-tumoral medicinal chemistry, is further documented by results on n-alkyl, alkynyl and alkenyl representatives. The N-naphthyl carbamate of an n-butyl-AC is thus characterized by X-ray crystallography. A novel dialkynylcarbinol (DAC) with synthetic potential is described, namely the highly dissymmetrical triisopropylsilyl-protected version of diethynylmethanol. The latter is shown to act as a dipolarophile in a selective Huisgen reaction with benzyl azide under CuAAC click

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