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Journal articles on the topic 'Alkoxy group'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Wang, An-ran, Abdul Qadeer Dayo, Dan Lv, et al. "Novel amino-containing fluorene-based bisphthalonitrile compounds with flexible group." High Performance Polymers 30, no. 7 (2017): 767–75. http://dx.doi.org/10.1177/0954008317725158.

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A series of amino-containing fluorene-based bisphthalonitrile (AFPN) monomers with alkyl or alkoxy groups were successfully produced by the reaction of 4-nitrophthalonitrile with 9, 9-bis (3-alkyl (or alkoxy)-4-aminophenyl)-2, 7-dihydroxylfluorene in the presence of potassium carbonate by a nucleophilic substitution reaction. The chemical structures of the synthesized monomers were confirmed by the Fourier transform infrared (FTIR), proton nuclear magnetic resonance, and carbon-13 nuclear magnetic resonance analyses. The synthesized monomers’ curing behaviors were evaluated by FTIR and differe

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2

El-atawy, Mohamed A., Magdi M. Naoum, Salma A. Al-Zahrani, and Hoda A. Ahmed. "New Nitro-Laterally Substituted Azomethine Derivatives; Synthesis, Mesomorphic and Computational Characterizations." Molecules 26, no. 7 (2021): 1927. http://dx.doi.org/10.3390/molecules26071927.

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Two new homologues series, based on two rings of the azomethine central group bearing the terminal alkoxy group of various chain lengths, were prepared. The alkoxy chain length varied between 6 and 16 carbons. The other terminal wing in the first series was the F atom, and the compound is named N-4-florobenzylidene-4-(alkoxy)benzenamine (In). The second group of compounds included a lateral NO2 substituent in addition to the terminal F atom, named N-(4-fluoro-3-nitrobenzylidene)-4-(alkyloxy)aniline (IIn). Mesomorphic and optical properties were carried out via differential scanning calorimetry

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3

Ward, Dale E., Marcelo Sales та Matthew J. Hrapchak. "Attempted enantiotopic group selective cyanohydrin formation from α-alkoxy aldehydes by double stereodifferentiation". Canadian Journal of Chemistry 79, № 11 (2001): 1775–85. http://dx.doi.org/10.1139/v01-151.

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Enantiotopic group selectivity can result from the competition between substrate and reagent double stereodifferentiation. We have examined this approach for enantioselective hydrocyanation of racemic α-alkoxy aldehydes (e.g., 2-(phenylmethoxy)heptanal (1)). Reaction of 1 with TMSCN mediated by chiral nonracemic alkoxy Ti(IV) reagents under conditions known to be reasonably enantioface selective in reactions with achiral aldehydes, proceeded with very low enantiotopic group selectivity (<2:1). It was established that TMSCN can react with Ti(IV) reagents to produce "TiCN" adducts that are ca

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4

Mohammady, Sayed Z., Daifallah M. Aldhayan, Mohammed A. Alshammri, et al. "Polar Alkoxy Group and Pyridyl Effects on the Mesomorphic Behavior of New Non-Symmetrical Schiff Base Liquid Crystals." Symmetry 13, no. 10 (2021): 1832. http://dx.doi.org/10.3390/sym13101832.

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A series of non-symmetrical Schiff base liquid crystals were prepared and investigated. Schiff bases of p-alkyloxy aniline derivatives and 4-phenyl pyridine-4′-carbaldehyde were synthesized. The terminal alkoxy groups substituting aniline are of varied chain length, namely C6, C8, and C16. The structures of the compounds were confirmed via 1H NMR and 13C NMR spectroscopy. Different mesophases of the samples were thermally and optically characterized by differential thermal analysis (DSC) and polarized optical microscopy (POM). All samples revealed enantiotropic smectic B (SmB) and smectic A (S

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5

Kamboj, Ramesh C., Urmila Berar, Surinder Berar, Mandeep Thakur, Rita Arora, and Satish C. Gupta. "Photochemistry of 3-alkoxychromones I — Photocyclisation of 6-chloro-3-alkoxy-2-(furan-3-yl)-4H-chromen-4-ones." Canadian Journal of Chemistry 87, no. 2 (2009): 422–29. http://dx.doi.org/10.1139/v08-177.

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3-Alkoxy/allyloxy-6-chloro-2-(furan-3-yl)-4H-chromen-4-ones yield angular tetracyclic products involving the 2-furyl group on photoirradiation through the intermediacy of 1,4-biradicals. The nature of the 3-alkoxy/allyloxy group influenced the photoproduct distribution. The stereochemical dispositions of the products have been established using the J/Φ relationship and were corroborated by MM2 calculations.

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6

Stănciuc, Gabriela, Miron T. Căproiu, Horia Căldăraru, Agneta Caragheorgheopol, Titus Constantinescu, and Alexandru T. Balaban. "Factors Affecting Stability and Equilibria of Free Radicals, XVII+ EPR Evidence for Formation of N-Alkoxypicramides on Oxidation of N-Alkoxy-dinitroanilines. Electronic Structure of Aminyl Radicals." Zeitschrift für Naturforschung B 44, no. 11 (1989): 1459–63. http://dx.doi.org/10.1515/znb-1989-1123.

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Oxidation of N-alkoxy-2,6- or -2,4-dinitroanilines with various oxidizing agents yields the corresponding N-alkoxydinitrophenyl-aminyls, which then undergo spontaneous conversion into the corresponding N-alkoxy-2,4,6-trinitrophenyl-aminyls. The EPR spectra of all these persistent aminyls are presented and discussed. Such disproportionations did not occur in capto-dative diaryl-aminyls which had lower spin densities on the electron-acceptor group than the present N–alkoxy-polynitrophenyl-aminyls (these have, in addition. Ν—Ο bonds which are less strong than N—C bonds). Electronic structures of

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7

Lee, Sae Hui, Marco S. Valverde Paredes, Paul M. Forster, and Dong-Chan Lee. "Side group dependent room temperature crystallization-induced phosphorescence of benzil based all organic phosphors." RSC Advances 14, no. 9 (2024): 6285–91. http://dx.doi.org/10.1039/d4ra00816b.

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8

Ghosh, Dipesh. "An Unusual Cu(II) Mediated C–N Single Bond Cleavage of Pentacoordinating N4S Ligands: Control of Copper Coordination Geometry by Modified Ligand Structure." Asian Journal of Chemistry 31, no. 11 (2019): 2653–62. http://dx.doi.org/10.14233/ajchem.2019.22295.

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Complexation of copper(II) with penta-coordinated N4S ligands in alcohols proceeded through unusual reaction paths involving C-N bond cleavage process. The products are square planar compound with a modified ligand structure that includes an alkoxy group provided by the solvent. The complexes are characterized by single crystal XRD, elemental analyses, IR, UV-visible and EPR spectroscopic techniques. Cyclic voltammetry shows Cu(II)/Cu(I) reduction becomes more difficult with the increase in donor strength of alkoxy group.

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9

Ryu, Chang Seok, and Kwang-Jea Kim. "Interfacial Adhesion in Silica-Silane Filled NR Composites: A Short Review." Polymers 14, no. 13 (2022): 2705. http://dx.doi.org/10.3390/polym14132705.

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We reviewed the accelerators, the hydrolysis and condensation reaction mechanism of bifunctional alkoxy silane, and the mechanism of zinc ion in natural rubber (NR) composites. NR composites transform into thermoset composites after vulcanization reaction with help of sulfur and accelerators. Bifunctional alkoxy silanes chemically bond between NR and inorganic silica. For alkoxy silane coupling with silica surface, hydrolysis reaction takes first and then condensation reaction with hydroxyl group in silica takes place. With help of zinc ion the reaction efficiency increases significantly. Zinc

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10

Antonysakthi, S., M. S. Selvakumar, and P. L. Prabha. "Electroorganic Synthesis and Characterization of 4-Ethoxy Acetanilide using Platinum and Graphite as Anodes." Journal of Scientific Research 14, no. 2 (2022): 583–91. http://dx.doi.org/10.3329/jsr.v14i2.54735.

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Alkoxy group substituted compounds of acetanilide are found to have pharmacological and industrial importance. Synthesis of alkoxy substituted acetanilides via conventional thermal methods involves multi-step processes, formation of side products, and the poor yield of desired products. But, the vast literature studies reveal that electroorganic synthesis of alkoxy substituted acetanilide derivatives would be effectively carried out through electrochemical oxidation methods. The direct substitution of the ethoxy (alkoxy) group onto the aromatic ring, an electrophilic substitution, has not been

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11

Tikhomirov, Alexander S., Daria V. Andreeva, and Andrey E. Shchekotikhin. "Reductive elimination of alkoxy group in anthraquinone derivatives." Tetrahedron 122 (September 2022): 132957. http://dx.doi.org/10.1016/j.tet.2022.132957.

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12

Filipkowski, Michelle A., Herbert E. Petty, Mark D. Westmeyer, and Curtis L. Schilling. "Unexpected Silicon Group Transfer in Difunctional Alkoxy Silanes." Organic Process Research & Development 6, no. 1 (2002): 15–19. http://dx.doi.org/10.1021/op010220c.

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13

Thimmaraju, N., and S. Z. Mohamed Shamshuddin. "Synthesis of 2,4,5-trisubstituted imidazoles, quinoxalines and 1,5-benzodiazepines over an eco-friendly and highly efficient ZrO2–Al2O3 catalyst." RSC Advances 6, no. 65 (2016): 60231–43. http://dx.doi.org/10.1039/c6ra13956f.

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14

Xue, Gi, Jack L. Koenig, Hatsuo Ishida, and Don D. Wheeler. "Chemical Reactions of an Epoxy-Functional Silane in Aqueous Solutions." Rubber Chemistry and Technology 64, no. 2 (1991): 162–71. http://dx.doi.org/10.5254/1.3538549.

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Abstract When the coupling agent is dissolved homogeneously in water, the hydrolysis rate of the alkoxy group is influenced by the pH of the solution, the size of the alkoxy group, and to a lesser extent, the size of the organofunctional group directly attached to the silane atom. We have quantitatively studied the reactions of γ-GPS in aqueous solutions. In a dilute solution, the silanol group slowly condensed to siloxane at pH = 4. The epoxy group reacts with both water and the silanol group. The reaction rate of the epoxy group with water is influenced by the pH of the solution. The reactio

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15

Meena, Lakshman, Vinay S. Sharma, Hitendra Mali, and Jigar Y. Soni. "Synthesis and characterization of acrylamide substituted sulfanilamide based calamitic LCs: effect of terminal group on phase behavior." Current Chemistry Letters 13, no. 2 (2024): 391–402. http://dx.doi.org/10.5267/j.ccl.2023.10.006.

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In the present study, we have prepared two phenyl ring substituted sulfanilamide bearing acrylamide linking groups. The four derivatives (C1-C4) were prepared by changing the left n-alkoxy terminal group. The liquid crystalline properties of the synthesized sulfanilamide-based compounds were investigated using POM and DSC studies. All four materials exhibit nematic liquid crystalline properties during both heating and cooling. They also demonstrate a broad temperature range and thermal stability. Further, we have studied the structure-property relationship to gain a better understanding of the

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16

Nakamura, Itaru, Mai Tachibana, Riku Konta, Hiroki Tashiro, and Masahiro Terada. "Synthesis of meta-Aminophenol Derivatives via Cu-Catalyzed [1,3]-Rearrangement—Oxa-Michael Addition Cascade Reactions." Molecules 28, no. 10 (2023): 4251. http://dx.doi.org/10.3390/molecules28104251.

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Cu-catalyzed reactions of N-alkoxy-2-methylanilines and alcohols in the presence of catalytic amounts of IPrCuBr and AgSbF6 afforded the corresponding meta-aminophenol derivatives in good to high yields. These reactions proceed via a [1,3]-rearrangement, in which the alkoxy group migrates from the nitrogen atom to the methyl-substituted ortho position, followed by an oxa-Michael reaction of the resulting ortho-quinol imine intermediate.

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17

Reddy, Martala Venkateswara, Bathini Veeraprakash, B. Mahesh B. Mahesh, Mala Ramanjaneyulu, and P. Venkateswarlu P. Venkateswarlu. "Experimental and Computational Study of Thiophene Based Calamitic Liquid Crystals." Oriental Journal Of Chemistry 39, no. 1 (2023): 144–53. http://dx.doi.org/10.13005/ojc/390117.

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The structurally analogous calamitic mesogens 4-((4-(decyloxy) phenoxy) carbonyl) phenyl thiophene-2-carboxylate [2TWC10] and 4-(Thiophen-3-yl) phenyl 4-dodecylbenzoate [S12] based on thiophene were synthesized and structures of the molecules were confirmed by spectroscopic techniques. Among the two molecules, only 2TWC10 mesogen with alkoxy terminal exhibited a typical threaded structure indicating a homeotropic nematic phase under hot stage-polarizing optical microscopy (HOPM). Further, it is supported by differential scanning calorimetry (DSC). Remarkably, alkyl terminal S12 mesogen is not

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18

Matsuo, Yutaka, and Hao-Sheng Lin. "(Invited) Evaporable Fullerene-Fused Ketone Via One-Step Direct Oxidation of Alkoxy to Ketone: Fullerene As a Redox Active Pendant." ECS Meeting Abstracts MA2022-01, no. 11 (2022): 812. http://dx.doi.org/10.1149/ma2022-0111812mtgabs.

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We developed a direct oxidation reaction from a methoxy group to a keto group using a mild oxidizing agent with the aid of an oxidizable fullerene pendant. By using this key reaction, we developed a fullerene derivative that is stable even at high temperatures of 400 deg-C or higher and can be used for vacuum deposition to make thin films in organic electronic devices. A highly efficient CuBr2 promoted one-step direct oxidation of alkoxy indano[60]fullerenes to [60]fullerene-fused ketones is showcased. It is shown that the fullerene can behave as an electron-pool controlling the electron trans

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19

Khan, Zafar, and Tony Durst. "Preparation of 1-thio and 1-amino substituted 1,3-dihydrobenzo[c]thiophene 2,2-dioxides." Canadian Journal of Chemistry 65, no. 3 (1987): 482–86. http://dx.doi.org/10.1139/v87-083.

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The 1-hydroxy substituent in 1-hydroxy-1,3-dihydrobenzo[c]thiophene 2,2-dioxides is readily replaced by alkoxy, alkylthio, and amino groups. These compounds serve as precursors of alkoxy, alkylthio, and amino substituted o-quinodimethanes. Cycloaddition reactions between a series of 1,4-disubstituted o-quinodimethanes bearing a phenyl group and one of the above heteroatoms, and typical dienophiles such as dimethyl fumarate and methyl crotonate were carried out. The phenyl group controlled both the regiochemistry and stereochemistry of these cycloaddition reactions, with the major products bein

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20

Yang, Yuhui, Jialei Liu, Maolin Zhang, et al. "The important role of the location of the alkoxy group on the thiophene ring in designing efficient organic nonlinear optical materials based on double-donor chromophores." Journal of Materials Chemistry C 3, no. 16 (2015): 3913–21. http://dx.doi.org/10.1039/c5tc00241a.

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21

Kim, Hong-Rae, Young Eum Hyun, Dnyandev B. Jarhad, Jinha Yu, and Lak Shin Jeong. "An alternative and efficient synthesis of MLN4924, a selective NEDD8 inhibitor." Organic Chemistry Frontiers 6, no. 14 (2019): 2480–87. http://dx.doi.org/10.1039/c9qo00507b.

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22

Takuwa, Akio, Osamu Soga, Mitsumi Itoh, and Kazuhiro Maruyama. "Cyclization of Type II Diradicals from 3-Alkoxy-1,2-naphthoquinones. Photochemical Transformation of an Alkoxyl Group into a Methylenedioxy Group." Chemistry Letters 16, no. 4 (1987): 727–30. http://dx.doi.org/10.1246/cl.1987.727.

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23

Novelli, A., C. Cho, H. Fuchs, et al. "Experimental and theoretical study on the impact of a nitrate group on the chemistry of alkoxy radicals." Physical Chemistry Chemical Physics 23, no. 9 (2021): 5474–95. http://dx.doi.org/10.1039/d0cp05555g.

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The chemistry of nitrated alkoxy radicals, and its impact on RO<sub>2</sub> measurements using the laser induced fluorescence (LIF) technique, is examined by a combined theoretical and experimental study.

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24

Gupta, Satish C., Somesh Sharma, Mohamad Yusuf, et al. "Photocyclisation of 3-Alkoxythiochromones: Activation for H-Abstraction." Journal of Chemical Research 2002, no. 4 (2002): 165–67. http://dx.doi.org/10.3184/030823402103171744.

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25

MILBURN, G. H. W., J. WRIGHT, A. J. SHAND, and A. R. WERNINCK. "RECENT STUDIES OF DIYNE MONOMERS CONTAINING PYRIDINE AS AN ELECTRON WITHDRAWING GROUP." Journal of Nonlinear Optical Physics & Materials 03, no. 04 (1994): 447–57. http://dx.doi.org/10.1142/s0218199194000249.

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Some recent developments in diacetylene synthesis are discussed and some interesting physical properties are reported. Examples are given of unsymmetrical diacetylenes containing a pyridine ring bonded directly to one end of the diyne unit and an aryl system containing a flexible alkoxy chain joined to the opposite end. Mesophase and nonlinear optical properties are examined.

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26

Solanki, Ravindra, and R. B. Patel. "Mesomorphism dependence of a terminal or lateral alkoxy group." Molecular Crystals and Liquid Crystals 634, no. 1 (2016): 50–57. http://dx.doi.org/10.1080/15421406.2016.1190144.

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27

Szesni, Normen, Bernhard Weibert, and Helmut Fischer. "Alkoxy-substituted group 6 allenylidene complexes – Synthesis and properties." Inorganica Chimica Acta 359, no. 2 (2006): 617–32. http://dx.doi.org/10.1016/j.ica.2005.08.010.

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28

Zhu, Xueyou, Fengnan Yin, Haiying Zhao, Shufeng Chen, and Zhanxi Bian. "Some new azobenzene liquid crystals involving chalcone and ester linkages." RSC Adv. 7, no. 73 (2017): 46344–53. http://dx.doi.org/10.1039/c7ra06958h.

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29

Sato, Kazuyuki, Graham Sandford, Yukiko Konishi, et al. "Lewis acid promoted fluorine-alkoxy group exchange reactions for the synthesis of 5-alkoxy-4,4-difluoroisoxazoline systems." Organic & Biomolecular Chemistry 17, no. 10 (2019): 2818–23. http://dx.doi.org/10.1039/c9ob00097f.

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30

Arakawa, Yuki, Sungmin Kang, Junji Watanabe, and Gen-ichi Konishi. "Assembly of thioether-containing rod-like liquid crystalline materials assisted by hydrogen-bonding terminal carboxyl groups." RSC Advances 5, no. 11 (2015): 8056–62. http://dx.doi.org/10.1039/c4ra15300f.

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A hydrogen-bonding-tolane-based liquid crystalline material with an alkylsulfanyl group was synthesized, which exhibited a long-range correlated mesophase compared with analogs with alkyl and alkoxy groups.

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31

Kurzer, Frederick, and C. Richard Duffner. "Diisophorone and Related Compounds, Part 27 [1] Nucleophilic Reactions of 1-Halogenodiisophoranes." Zeitschrift für Naturforschung B 45, no. 9 (1990): 1314–23. http://dx.doi.org/10.1515/znb-1990-0915.

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The action of nucleophiles on 1-halogenodiisophoranes, obtained by several methods from the corresponding 1-hydroxy or 1-alkoxy compounds, replaces their bridgehead 1-halogen by hydroxy, alkoxy or acetoxy groups. The semiquantitative results show that the high solvolysis and hydrolysis rates of the 1-halogenodiisophor-2(7)-en-3-ones contrast markedly with the low reactivities of their 3-deketo analogues. Perchloric acid-catalyzed acetylation of diisophor-2(7)-en-1-ol-3-ones yields, by enolisation of the 3-keto-group, 1,3-diacetoxydiisophora-2,7-dienes in addition to the usual 1-monoacetates.

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32

Castro, Mirian R. C. de, Angelo Q. Aragão, Hamilton B. Napolitano, Caridad Noda-Perez, and Felipe T. Martins. "An additional methylene group driving the conformation and assembly of two arylsulfonamidepara-alkoxychalcone hybrids." Acta Crystallographica Section C Crystal Structure Communications 69, no. 3 (2013): 267–72. http://dx.doi.org/10.1107/s0108270113002291.

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The structures of two arylsulfonamidepara-alkoxychalcones, namely,N-{4-[(E)-3-(4-methoxyphenyl)prop-2-enoyl]phenyl}benzenesulfonamide, C22H19NO4S, (I), andN-{4-[(E)-3-(4-ethoxyphenyl)prop-2-enoyl]phenyl}benzenesulfonamide, C23H21NO4S, (II), reveal the effect of the inclusion of one –CH2– group between the CH3branch and the alkoxy O atom on the conformation and crystal structure. Although the molecular conformations and one-dimensional chain motifs are the same in both structures, their crystallographic symmetry, number of independent molecules and crystal packing are different. The crystal pac

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33

Zdun, Beata, Piotr Cieśla, Jan Kutner, and Paweł Borowiecki. "Expanding Access to Optically Active Non-Steroidal Anti-Inflammatory Drugs via Lipase-Catalyzed KR of Racemic Acids Using Trialkyl Orthoesters as Irreversible Alkoxy Group Donors." Catalysts 12, no. 5 (2022): 546. http://dx.doi.org/10.3390/catal12050546.

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Studies into the enzymatic kinetic resolution (EKR) of 2-arylpropanoic acids (‘profens’), as the active pharmaceutical ingredients (APIs) of blockbuster non-steroidal anti-inflammatory drugs (NSAIDs), by using various trialkyl orthoesters as irreversible alkoxy group donors in organic media, were performed. The enzymatic reactions of target substrates were optimized using several different immobilized preparations of lipase type B from the yeast Candida antarctica (CAL-B). The influence of crucial parameters, including the type of enzyme and alkoxy agent, as well as the nature of the organic c

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34

Tobisu, Mamoru, Toshifumi Morioka, Akimichi Ohtsuki, and Naoto Chatani. "Nickel-catalyzed reductive cleavage of aryl alkyl ethers to arenes in absence of external reductant." Chemical Science 6, no. 6 (2015): 3410–14. http://dx.doi.org/10.1039/c5sc00305a.

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35

Al-Mutabagani, Laila Ahmed, Latifah A. Alshabanah, Sobhi M. Gomha, and Hoda A. Ahmed. "Synthesis, Thermal and Optical Characterizations of New Lateral Organic Systems." Crystals 11, no. 5 (2021): 551. http://dx.doi.org/10.3390/cryst11050551.

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New laterally OCH3-substituted optical organic Schiff base/ester series, namely 4-(4-(hexyloxyphenyl)iminomethyl)-3-methoxyphenyl 4-alkoxybenzoates, were prepared and characterized with different thermal, mesomorphic, and photoactive techniques. The prepared group constitutes five homologues that differ from each other in the number of carbons in the terminal alkoxy chain (n), which varies between n = 6, 8, 10, 12, and 16 carbons. The laterally protruded methoxy group is attached to the central benzene ring that makes an angle of 120° with the molecular long axis. Molecular structures of all n

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36

Yang, Songjie, A. Christopher Garner, and John D. Wallis. "N–H⋯O hydrogen bonding to the alkoxy oxygen of a carboxylic ester group: crystal structures of methyl 2,6-diaminobenzoate and its derivatives." CrystEngComm 22, no. 21 (2020): 3701–12. http://dx.doi.org/10.1039/d0ce00495b.

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37

Ishikawa, Kohei, Ayumi Watarai, Mikio Yasutake, and Kazuchika Ohta. "Discotic liquid crystals of transition metal complexes 56: Synthesis of mesogenic phthalocyanine-fullerene dyads and influence of the substitution position of alkoxy chains and the kind of terminal groups on appearance of the helical supramolecular structure." Journal of Porphyrins and Phthalocyanines 22, no. 08 (2018): 693–715. http://dx.doi.org/10.1142/s108842461850092x.

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We have synthesized twelve novel discotic columnar liquid crystals based on a phenoxy-group-substituted phthalocyaninato copper(II) complex having the same alkoxy chain of C[Formula: see text]H[Formula: see text]O at different positions in the phenoxy group: the parent compounds {0a~0c-16}and the OH-substituted compounds {3a~3c-16}, the OFBA-substituted compounds {2a~2c-16}and the C[Formula: see text]-substituted dyads {1a~1c-16}. The letters of a, b and c mean substitution positions of C[Formula: see text]H[Formula: see text]O group at [Formula: see text], [Formula: see text] and [Formula: se

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38

Ben Salah, Manel, Lotfi Saadaoui, Taoufik Soltani, Naoufel Ben Hamadi, Ahlem Guesmi, and Ulrich Maschke. "New Series of Hydrogen-Bonded Liquid Crystal with High Birefringence and Conductivity." Molecules 29, no. 14 (2024): 3422. http://dx.doi.org/10.3390/molecules29143422.

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Liquid crystals with high dielectric anisotropy, low operational thresholds, and significant birefringence (Δn) represent a key focus in soft matter research. This work introduces a novel series of hydrogen-bonded liquid crystals (HBLCs) derived from 4-n-alkoxybenzoic, 4-alkoxy-3-fluorobenzoic derivatives (nOBAF), 4-alkoxy-2,3-fluorobenzoic derivatives (nOBAFF), and 2-fluoro-4-nitrobenzoic acid. The HBLCs were characterized using Fourier transform infrared spectroscopy, and their thermal behavior was evaluated via differential scanning calorimetry. Optical observations were conducted using pol

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39

Petko, Kirill I., Andrey A. Filatov, and Taras M. Sokolenko. "Features of Nitration of Aromatic Aldehydes with the Difluoromethoxy Group." Journal of Organic and Pharmaceutical Chemistry 21, no. 3 (2023): 3–10. http://dx.doi.org/10.24959/ophcj.23.285469.

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Nitration of aromatic aldehydes with difluoromethoxy group results in the partial ipso-substitution of the aldehyde group if difluoromethoxy group is located in the para-position to the aldehyde group. The presence of a chlorine atom in the meta-position to the aldehyde group increases the contribution of the ipso-substitution, while the presence of a chlorine atom in the ortho-position to the aldehyde group reduces it. The presence of strong donors (alkoxy groups) in the molecule eliminates the contribution of the ipso-substitution.

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40

Węgłowska, Dorota, Przemysław Kula, and Jakub Herman. "High birefringence bistolane liquid crystals: synthesis and properties." RSC Advances 6, no. 1 (2016): 403–8. http://dx.doi.org/10.1039/c5ra15291g.

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Twenty both symmetrical and non-symmetrical bistolanes with terminal alkyl, alkoxy and alkylsulfanyl chain and lateral methyl or ethyl group have been synthesized via Sonogashira cross-coupling and their mesomorphic properties have been studied.

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41

Watanabe, Naoyuki, Takeshi Sugai, and Hiromichi Ohta. "Enzymatic Preparation of Glycerol-related Chiral Pool Possessingtert-Alkoxy Group." Chemistry Letters 21, no. 4 (1992): 657–60. http://dx.doi.org/10.1246/cl.1992.657.

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42

Wu, Jianwei, Hiroaki Okamoto, and Shunsuke Takenaka. "Conformational Effect of a Lateral Alkoxy Group on Mesomorphic Properties." Chemistry Letters 30, no. 2 (2001): 116–17. http://dx.doi.org/10.1246/cl.2001.116.

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43

Sharma, Vinay S., and R. B. Patel. "Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism." International Letters of Chemistry, Physics and Astronomy 59 (September 2015): 115–23. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.59.115.

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A novel homologous series RO-C6H4-CH=CH-COO-C6H4-CO-CH=CH-C6H4-OC16H33 (n) para of chalconyl ester derivatives have been synthesized and studied with a view to understand and establish the effect of molecular structure on thermotropic liquid crystalline state of the substances and to provide novel liquid crystal (LC) materials to the researchers working in an unique multidisciplinary LC state of the substances. A novel chalconyl ester series consists of thirteen ( C1 to C18) homologues. C5 to C18 homologues are enantiotropically nematogenic without exhibition of smectogenic property, while the

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44

Takeda, H., S. Takenaka, H. Miyake, and S. Kusabayashi. "Novel Ferroelectric Liquid Crystals Incorporating a Lateral Long-Alkoxy Group." Molecular Crystals and Liquid Crystals 202, no. 1 (1991): 111–15. http://dx.doi.org/10.1080/00268949108035663.

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45

Sharma, Vinay S., and R. B. Patel. "Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism." International Letters of Chemistry, Physics and Astronomy 59 (September 14, 2015): 115–23. http://dx.doi.org/10.56431/p-g9rq50.

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A novel homologous series RO-C6H4-CH=CH-COO-C6H4-CO-CH=CH-C6H4-OC16H33 (n) para of chalconyl ester derivatives have been synthesized and studied with a view to understand and establish the effect of molecular structure on thermotropic liquid crystalline state of the substances and to provide novel liquid crystal (LC) materials to the researchers working in an unique multidisciplinary LC state of the substances. A novel chalconyl ester series consists of thirteen ( C1 to C18) homologues. C5 to C18 homologues are enantiotropically nematogenic without exhibition of smectogenic property, while the

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46

López-Alberca, María P, María J Mancheño, Israel Fernández, Mar Gómez-Gallego, Miguel A Sierra, and Rosario Torres. "Synthesis and Properties of Mononuclear Group 10 Alkoxy-Biscarbene Complexes." Chemistry - A European Journal 15, no. 14 (2009): 3595–603. http://dx.doi.org/10.1002/chem.200802147.

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47

Fulloon, Belinda, Hisham A. A. El-Nabi, Gert Kollenz, and Curt Wentrup. "Imidoylketene - oxoketenimine rearrangement. Facile 1,3-shift of an alkoxy group." Tetrahedron Letters 36, no. 36 (1995): 6547–50. http://dx.doi.org/10.1016/0040-4039(95)01283-n.

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48

Oburn, Shalisa M., and Eric Bosch. "Unexpected beauty and diversity in the structures of three homologous 4,5-dialkoxy-1-ethynyl-2-nitrobenzenes: the subtle interplay between intermolecular C—H...O hydrogen bonds and alkyl chain length." Acta Crystallographica Section C Structural Chemistry 73, no. 10 (2017): 814–19. http://dx.doi.org/10.1107/s2053229617012761.

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The synthesis, 1H and 13C NMR spectra, and X-ray structures are described for three dialkoxy ethynylnitrobenzenes that differ only in the length of the alkoxy chain, namely 1-ethynyl-2-nitro-4,5-dipropoxybenzene, C14H17NO4, 1,2-dibutoxy-4-ethynyl-5-nitrobenzene, C16H21NO4, and 1-ethynyl-2-nitro-4,5-dipentoxybenzene, C18H25NO4. Despite the subtle changes in molecular structure, the crystal structures of the three compounds display great diversity. Thus, 1-ethynyl-2-nitro-4,5-dipropoxybenzene crystallizes in the trigonal crystal system in the space group R{\overline 3}, with Z = 18, 1,2-dibutoxy

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49

Amrane, Dyhia, Armand Gellis, Sébastien Hutter, et al. "Synthesis and Antiplasmodial Evaluation of 4-Carboxamido- and 4-Alkoxy-2-Trichloromethyl Quinazolines." Molecules 25, no. 17 (2020): 3929. http://dx.doi.org/10.3390/molecules25173929.

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From three previously identified antiplasmodial hit compounds (A–C) and inactive series (D), all based on a 2-trichloromethylquinazoline scaffold, we conducted a structure-activity relationship (SAR) study at position four of the quinazoline ring by synthesizing 42 novel derivatives bearing either a carboxamido- or an alkoxy-group, to identify antiplasmodial compounds and to enrich the knowledge about the 2-trichloromethylquinazoline antiplasmodial pharmacophore. All compounds were evaluated in vitro for their cytotoxicity towards the HepG2 cell line and their activity against the multiresista

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50

Vivas-Reyes, Ricardo, and Andersson Arias. "Evaluation of group electronegativities and hardness (softness) of group 14 elements and containing functional groups through density functional theory and correlation with NMR spectra data." Ecletica Quimica 33, no. 3 (2008): 69–76. http://dx.doi.org/10.26850/1678-4618eqj.v33.3.2008.p69-76.

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Quantum Chemical calculations for group 14 elements of Periodic Table (C, Si, Ge, Sn, Pb) and their functional groups have been carried out using Density Functional Theory (DFT) based reactivity descriptors such as group electronegativities, hardness and softness. DFT calculations were performed for a large series of tetracoordinated Sn compounds of the CH3SnRR’X type, where X is a halogen and R and R’ are alkyl, halogenated alkyl, alkoxy, or alkyl thio groups. The results were interpreted in terms of calculated electronegativity and hardness of the SnRR’X groups, applying a methodology previo

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