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Journal articles on the topic 'Nucleophilic aromatic polycondensation [SNAr]'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Kikushima, Kotaro, Haruka Koyama, Kazuki Kodama, and Toshifumi Dohi. "Nucleophilic Aromatic Substitution of Polyfluoroarene to Access Highly Functionalized 10-Phenylphenothiazine Derivatives." Molecules 26, no. 5 (2021): 1365. http://dx.doi.org/10.3390/molecules26051365.

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Nucleophilic aromatic substitution (SNAr) reactions can provide metal-free access to synthesize monosubstituted aromatic compounds. We developed efficient SNAr conditions for p-selective substitution of polyfluoroarenes with phenothiazine in the presence of a mild base to afford the corresponding 10-phenylphenothiazine (PTH) derivatives. The resulting polyfluoroarene-bearing PTH derivatives were subjected to a second SNAr reaction to generate highly functionalized PTH derivatives with potential applicability as photocatalysts for the reduction of carbon–halogen bonds.

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2

Walton, James W., and Jonathan M. J. Williams. "Catalytic SNAr of unactivated aryl chlorides." Chemical Communications 51, no. 14 (2015): 2786–89. http://dx.doi.org/10.1039/c4cc07116f.

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3

Li, Jinhua, Zhengyu Lu, Yuhui Hua, Dafa Chen, and Haiping Xia. "Carbolong chemistry: nucleophilic aromatic substitution of a triflate functionalized iridapentalene." Chemical Communications 57, no. 68 (2021): 8464–67. http://dx.doi.org/10.1039/d1cc03261e.

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4

Gallardo-Fuentes, Sebastián, та Rodrigo Ormazábal-Toledo. "σ-Holes promote the concertedness in nucleophilic aromatic substitution reactions of nitroarenes". New Journal of Chemistry 43, № 20 (2019): 7763–69. http://dx.doi.org/10.1039/c9nj01493d.

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5

Tanaka, Kiyoshi, Makoto Deguchi, and Satoru Iwata. "Ab initio Study of Nucleophilic Aromatic Substitution of Polyfluorobenzene." Journal of Chemical Research 23, no. 9 (1999): 528–29. http://dx.doi.org/10.1177/174751989902300905.

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Calculations at ab initio levels of theory of the nucleophilic aromatic substitution of pentafluoronitrobenzene with amines demonstrate an addition–elimination mechanism (SNAr), with the rate-determining step at the second transition state involving C–F bond breaking, and support the ortho-selectivity of the reactions based on the stability of the second transition states.

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6

Xu, Hui, and Hong-Feng Li. "One-pot Microwave-assisted Tandem Deprotection of Arylmethanesulfonates / SNAr Reaction for K2CO3-mediated C(Aryl)–O Bond Formation." Zeitschrift für Naturforschung B 62, no. 9 (2007): 1183–86. http://dx.doi.org/10.1515/znb-2007-0912.

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One-pot microwave-assisted tandem deprotection of arylmethanesulfonates / nucleophilic aromatic substitution reaction (SNAr) with activated aryl halides to synthesize asymmetrical diaryl ethers is described.

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7

Loh, Joanna K., Sun Young Yoon, Thiwanka B. Samarakoon, et al. "Exploring chemical diversity via a modular reaction pairing strategy." Beilstein Journal of Organic Chemistry 8 (August 15, 2012): 1293–302. http://dx.doi.org/10.3762/bjoc.8.147.

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The efficient synthesis of an 80-member library of unique benzoxathiazocine 1,1-dioxides by a microwave-assisted, intermolecular nucleophilic aromatic substitution (SNAr) diversification pathway is reported. Eight benzofused sultam cores were generated by means of a sulfonylation/SNAr/Mitsunobu reaction pairing protocol, and subsequently diversified by intermolecular SNAr with ten chiral, non-racemic amine/amino alcohol building blocks. Computational analyses were employed to explore and evaluate the chemical diversity of the library.

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8

Vasilenko, Dmitry A., Sevastian E. Dronov, Dzianis U. Parfiryeu, et al. "5-Nitroisoxazoles in SNAr reactions: access to polysubstituted isoxazole derivatives." Organic & Biomolecular Chemistry 19, no. 29 (2021): 6447–54. http://dx.doi.org/10.1039/d1ob00816a.

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An efficient protocol for the straightforward functionalization of the isoxazole ring via the reactions of aromatic nucleophilic substitution of the nitro group with various nucleophiles has been elaborated.

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9

Iqbal, Muhammad, Hina Mehmood, Jiaying Lv, and Ruimao Hua. "Base-Promoted SNAr Reactions of Fluoro- and Chloroarenes as a Route to N-Aryl Indoles and Carbazoles." Molecules 24, no. 6 (2019): 1145. http://dx.doi.org/10.3390/molecules24061145.

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KOH/DMSO-promoted C-N bond formation via nucleophilic aromatic substitution (SNAr) between chloroarenes or fluoroarenes with indoles and carbazole under transition metal-free conditions affording the corresponding N-arylated indoles and carbazoles has been developed.

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10

Shen, Chaoren, Helfried Neumann, and Xiao-Feng Wu. "A highly-efficient palladium-catalyzed aminocarbonylation/SNAr approach to dibenzoxazepinones." Green Chemistry 17, no. 5 (2015): 2994–99. http://dx.doi.org/10.1039/c5gc00427f.

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A practical protocol for the synthesis of dibenzo[b,e][1,4]oxazepin-11(5H)-ones has been developed. By virtue of Pd-catalyzed aminocarbonylation and aromatic nucleophilic substitution, 61 examples of the desired dibenzoxazepinones were obtained in moderate to excellent isolated yields (54–92%).

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11

Grossi, Loris, and Samantha Strazzari. "Aromatic radical anions as possible intermediates in the nucleophilic aromatic substitution (SNAr): an EPR study." Journal of the Chemical Society, Perkin Transactions 2, no. 10 (1999): 2141–46. http://dx.doi.org/10.1039/a903407b.

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12

Park, Sung-Woo, and Sung-Yul Lee. "Effects of Ion and Protic Solvent on Nucleophilic Aromatic Substitution (SNAr) Reactions." Bulletin of the Korean Chemical Society 31, no. 9 (2010): 2571–74. http://dx.doi.org/10.5012/bkcs.2010.31.9.2571.

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13

Henderson, Alexander S., Sandra Medina, John F. Bower, and M. Carmen Galan. "Nucleophilic Aromatic Substitution (SNAr) as an Approach to Challenging Carbohydrate–Aryl Ethers." Organic Letters 17, no. 19 (2015): 4846–49. http://dx.doi.org/10.1021/acs.orglett.5b02413.

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14

Nikol’skiy, Vladislav, Alexey Starosotnikov, and Maxim Bastrakov. "Synthesis of 2-Methyl-3-nitropyridines, 2-Styryl-3-nitropyridines and Their Reactions with S-Nucleophiles." Chemistry Proceedings 3, no. 1 (2020): 114. http://dx.doi.org/10.3390/ecsoc-24-08324.

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One of the most important and flexible tools for nitroarenes functionalization is nucleophilic aromatic substitution (SNAr). This reaction generally requires a number of conjugated electron-withdrawing groups and SNAr of non-activated nitro groups is rather uncommon. Most of these examples were obtained on polynitrobenzenes, but little is known about reactions of non-activated 3-nitropyridines. Here we report the synthesis of several 2-methyl-3-nitropyridines and their reactions with various aromatic aldehydes, leading to corresponding 2-styrylpyridines under mild conditions. Both 2-methyl- an

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15

Belaud-Rotureau, Mickael, Anne-Sophie Castanet, Thi Huu Nguyen, and Jacques Mortier. "Uncatalyzed CO2Li-Mediated SNAr Reaction of Unprotected Benzoic Acids via Silicon Trickery." Australian Journal of Chemistry 69, no. 3 (2016): 307. http://dx.doi.org/10.1071/ch15398.

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The alkyl and aryllithium nucleophilic aromatic substitution (SNAr) displacement of a fluoro or methoxy group from unprotected 2-fluoro/methoxybenzoic acids is discussed. It was discovered that a TMS group located at the C6-position ortho to the carboxyl group shields effectively the carboxylate against nucleophilic attack, thus reducing dramatically ketone formation, and reorients nucleophilic substitution to the C2-position. The reactions with fluoro-substituted substrate 7 proceed efficiently; in contrast, the use of methoxy-functionalized benzoic acid 8 only affords moderate yields with s-

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16

Gallardo-Fuentes, Sebastián, Ricardo A. Tapia, Renato Contreras, and Paola R. Campodónico. "Site activation effects promoted by intramolecular hydrogen bond interactions in SNAr reactions." RSC Adv. 4, no. 58 (2014): 30638–43. http://dx.doi.org/10.1039/c4ra04725g.

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The nucleophilic aromatic substitution reaction of benzohydrazide derivatives towards 2-chloro-5-nitropyrimidine is used as model system to experimentally and theoretically show that intramolecular hydrogen-bond formation operates as a perturbation that elicits a dual response at the reaction center of the transition state (TS) structure.

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17

Jin, Hao, Zhuo Gao, Shaodong Zhou, and Chao Qian. "One-Pot Approach for SNAr Reaction of Fluoroaromatic Compounds with Cyclopropanol." Synlett 30, no. 08 (2019): 982–86. http://dx.doi.org/10.1055/s-0037-1611768.

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A novel method for preparing aromatic compounds containing cyclopropoxy via nucleophilic aromatic substitution reaction (SNAr) of fluoroaromatic compounds with cyclopropanol under relatively mild conditions is presented. As compared to the approaches reported previously for preparing 1-(cyclopropyloxy)-2-nitrobenzene, the one proposed in this work is simplified without sacrificing the yields: When the reaction was performed at 75 °C with Cs2CO3 as the base and DMF as solvent, after 6 h the yield was up to 90%. Finally, various fluoroaromatic compounds were employed as substrates for a test tha

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18

Sharma, Nishant, Rupayan Biswas, and Upakarasamy Lourderaj. "Dynamics of a gas-phase SNAr reaction: non-concerted mechanism despite the Meisenheimer complex being a transition state." Physical Chemistry Chemical Physics 22, no. 45 (2020): 26562–67. http://dx.doi.org/10.1039/d0cp05567k.

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19

Perrio, Cécile, Sébastien Schmitt, Daniel Pla, et al. "[18F]-Fluoride capture and release: azeotropic drying free nucleophilic aromatic radiofluorination assisted by a phosphonium borane." Chemical Communications 53, no. 2 (2017): 340–43. http://dx.doi.org/10.1039/c6cc05168e.

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[<sup>18</sup>F]-Fluoride ready for SNAr was prepared according to a simple process including trapping of aqueous [<sup>18</sup>F]-fluoride on a cartridge pre-loaded with the phosphonium borane [(Ph<sub>2</sub>MeP)C<sub>6</sub>H<sub>4</sub>(BMes<sub>2</sub>)]<sup>+</sup>, then releasing by elution of TBACN in dry acetonitrile.

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20

Henderson, Alexander S., Sandra Medina, John F. Bower, and M. Carmen Galan. "ChemInform Abstract: Nucleophilic Aromatic Substitution (SNAr) as an Approach to Challenging Carbohydrate-Aryl Ethers." ChemInform 47, no. 7 (2016): no. http://dx.doi.org/10.1002/chin.201607215.

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21

Kim, Juhyeon, Yong Seo Cho, and Sun-Joon Min. "Facile Synthesis of 2-Amino-4-alkoxypyrimidines via Consecutive Nucleophilic Aromatic Substitution (SNAr) Reactions." Bulletin of the Korean Chemical Society 37, no. 12 (2016): 1998–2008. http://dx.doi.org/10.1002/bkcs.11014.

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22

Scales, Stephanie, Sarah Johnson, Qiyue Hu, et al. "Studies on the Regioselective Nucleophilic Aromatic Substitution (SNAr) Reaction of 2-Substituted 3,5-Dichloropyrazines." Organic Letters 15, no. 9 (2013): 2156–59. http://dx.doi.org/10.1021/ol4006695.

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23

Zhang, Xiao, Guo-ping Lu, and Chun Cai. "Facile aromatic nucleophilic substitution (SNAr) reactions in ionic liquids: an electrophile–nucleophile dual activation by [Omim]Br for the reaction." Green Chemistry 18, no. 20 (2016): 5580–85. http://dx.doi.org/10.1039/c6gc01742h.

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24

Hudson, R., N. P. Bizier, K. N. Esdale, and J. L. Katz. "Synthesis of indoles, benzofurans, and related heterocycles via an acetylene-activated SNAr/intramolecular cyclization cascade sequence in water or DMSO." Organic & Biomolecular Chemistry 13, no. 8 (2015): 2273–84. http://dx.doi.org/10.1039/c4ob02549k.

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The synthesis of 2-substituted indoles and benzofurans was achieved by nucleophilic aromatic substitution, followed by subsequent 5-endo-dig cyclization between the nucleophile and an ortho acetylene.

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25

Shi, Yao-Jun, Guy Humphrey, Peter E Maligres, Robert A Reamer, and J. Michael Williams. "Highly Regioselective DABCO-Catalyzed Nucleophilic Aromatic Substitution (SNAr) Reaction of Methyl 2,6-Dichloronicotinate with Phenols." Advanced Synthesis & Catalysis 348, no. 3 (2006): 309–12. http://dx.doi.org/10.1002/adsc.200505431.

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26

Rahimpour, Keshvar, Roghaye Nikbakht, Alireza Aghaiepour, and Reza Teimuri-Mofrad. "Synthesis of 2-(4-amino substituted benzylidene) indanone analogues from aromatic nucleophilic substitution (SNAr) reaction." Synthetic Communications 48, no. 17 (2018): 2253–59. http://dx.doi.org/10.1080/00397911.2018.1492726.

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27

Abd-El-Aziz, Alaa S., Christine R. de Denus, and Harold M. Hutton. "Ironcyclopentadienyl mediated 2-alkyl-2-arylphenylsulphonylacetonitrile synthesis." Canadian Journal of Chemistry 73, no. 2 (1995): 289–95. http://dx.doi.org/10.1139/v95-039.

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A unique route to the synthesis of 2-alkyl-2-arylphenylsulphonylacetonitriles via the nucleophilic aromatic substitution (SNAr) of chloroarene cyclopentadienyliron complexes with 2-alkyl phenylsulphonylacetonitriles has been investigated. Reactions of chloroarene complexes (1a–d) with 2-alkyl phenylsulphonylacetonitrile (2a,b) in the presence of K2CO3 in DMF at room temperature led to the formation of complexes 3a–d and 4a,c,d in good yields. The use of alkylated phenylsulphonylacetonitriles as nucleophiles in the reactions with the p-dichlorobenzene complex (1e) allowed the formation of the d

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28

Dutta, Ranjan, Brijesh Chandra, Seong-Jin Hong, Yeonju Park, Young Mee Jung, and Chang-Hee Lee. "Post Synthetic Modification of Planar Antiaromatic Hexaphyrin (1.0.1.0.1.0) by Regio-Selective, Sequential SNAr." Molecules 26, no. 4 (2021): 1025. http://dx.doi.org/10.3390/molecules26041025.

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In spite of unique structural, spectroscopic and redox properties, the synthetic variants of the planar, antiaromatic hexaphyrin (1.0.1.0.1.0) derivatives 2, has been limited due to the low yields and difficulty in access to the starting material. A chemical modification of the meso-substituents could be good alternative overcoming the synthetic barrier. Herein, we report a regio-selective nucleophilic aromatic substitution (SNAr) of meso-pentafluorophenyl group in rosarrin 2 with catechol. The reaction afforded benzodioxane fused rosarrin 3 as single product with high yield. The intrinsic ant

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29

Zhang, Xiao, Guo-ping Lu, and Chun Cai. "Correction: Facile aromatic nucleophilic substitution (SNAr) reactions in ionic liquids: an electrophile–nucleophile dual activation by [Omim]Br for the reaction." Green Chemistry 18, no. 22 (2016): 6143. http://dx.doi.org/10.1039/c6gc90108e.

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Correction for ‘Facile aromatic nucleophilic substitution (S<sub>N</sub>Ar) reactions in ionic liquids: an electrophile–nucleophile dual activation by [Omim]Br for the reaction’ by Xiao Zhang, et al., Green Chem., 2016, 18, 5580–5585.

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30

Ohta, Kiminori, Tokuhito Goto, and Yasuyuki Endo. "New synthetic method of 1,2-diaryl-1,2-dicarba-closo-dodecaboranes employing aromatic nucleophilic substitution (SNAr) reaction." Tetrahedron Letters 46, no. 3 (2005): 483–85. http://dx.doi.org/10.1016/j.tetlet.2004.11.074.

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31

Scales, Stephanie, and et al et al. "ChemInform Abstract: Studies on the Regioselective Nucleophilic Aromatic Substitution (SNAr) Reaction of 2-Substituted 3,5-Dichloropyrazines." ChemInform 44, no. 35 (2013): no. http://dx.doi.org/10.1002/chin.201335166.

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32

Salamov, Ali Kh, Abdulakh K. Mikitaev, Aues A. Beev, Julietti A. Beeva, Mukhamed Kh Ligidov, and Sergey I. Pakhomov. "POLYARYLENEETHERKETONES OBTAINING WITH REACTION OF NUCLEOPHILIC SUBSTITUTION." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 7 (2018): 4. http://dx.doi.org/10.6060/tcct.20165907.5389.

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The article deals with the study of influence of the synthesis conditions on the molecular weight of polyaryleneetherketones (PAEK), received with nucleophilic substitution reaction of activated aryl halide. The synthesis of PAEK with the nucleophilic substitution reaction carried out as partially hydrolyzed homopolycondensation of phenolates and aromatic dihalides containing a carbonyl group in the molecule and derivatives of polycondensation of aromatic bisphenols with activated aromatic dihalides, and aromatic nitro compounds. The nucleophilic substitution of halogen in aryldihalogens proce

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33

Chmovzh, Timofey, Ekaterina Knyazeva, Konstantin Lyssenko, Vadim Popov, and Oleg Rakitin. "Safe Synthesis of 4,7-Dibromo[1,2,5]thiadiazolo[3,4-d]pyridazine and Its SNAr Reactions." Molecules 23, no. 10 (2018): 2576. http://dx.doi.org/10.3390/molecules23102576.

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A safe and efficient synthesis of 4,7-dibromo[1,2,5]thiadiazolo[3,4-d]pyridazine from the commercial diaminomaleonitrile is reported. Conditions for selective aromatic nucleophilic substitution of one or two bromine atoms by oxygen and nitrogen nucleophiles are found, whereas thiols formed the bis-derivatives only. Buchwald-Hartwig or Ullmann techniques are successful for incorporation of a weak nitrogen base, such as carbazole, into the [1,2,5]thiadiazolo[3,4-d]pyridazine core. The formation of rather stable S…η2-(N=N) bound chains in 4,7-bis(alkylthio)-[1,2,5]thiadiazolo[3,4-d]pyridines make

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34

Zinad, Dhafer, Dunya AL-Duhaidahaw, Ahmed Al-Amiery, and Abdul Kadhum. "N-[4-(1-Methyl-1H-imidazol-2-yl)-2,4′-bipyridin-2′-yl]benzene-1,4-diamine." Molbank 2018, no. 4 (2018): M1030. http://dx.doi.org/10.3390/m1030.

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N-[4-(1-Methyl-1H-imidazol-2-yl)-2,4′-bipyridin-2′-yl]benzene-1,4-diamine was synthesized with a good yield by the reaction of 2′-chloro-4-(1-methyl-1H-imidazol-2-yl)-2,4′-bipyridine with 4-phenylenediamine. The functionalization of the pyridine was accomplished by a nucleophilic aromatic substitution (SNAr) reaction that afforded the target compound. The synthesized compound was characterized by chemical analysis, which includes nuclear magnetic resonance (NMR) (1H-NMR and 13C-NMR), Thin Layer Chromatography-Mass Spectrometry (TLC-MS), high- performance liquid chromatography (HPLC), Gas Chrom

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35

Kuznetsova, Anastasiya, Philipp Klein, and Till Opatz. "Halogenated 2,1,3-benzoxadiazoles as Potential Fluorescent Warheads for Covalent Protease Inhibitors." Proceedings 9, no. 1 (2018): 54. http://dx.doi.org/10.3390/ecsoc-22-05670.

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Recently there has been a growing interest in covalent protease inhibitors in both industry and academia, caused by their longer residence times, their higher potency and their high ligand efficiency. Covalently reactive moieties which interact with activated amino acid residues such as serine or cysteine in enzymes like proteases or esterases mostly act through nucleophilic addition, substitution or ring opening. In contrast, nucleophilic aromatic substitution (SNAr) is rarely employed. In our previous work, we prepared and investigated electrophilic “warheads”, which contain aromatic, hetero

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36

Li, Jin Huan, Hai Yang Wang, and Rui Hai Wang. "Highly Soluble Poly (Aryl-Ether Benzoxazole) Random Copolymers by Aromatic Nucleophilic Polycondensation: Synthesis and Properties." Advanced Materials Research 279 (July 2011): 120–25. http://dx.doi.org/10.4028/www.scientific.net/amr.279.120.

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Aromatic polybenzoxazoles (PBOs) are very promising materials for civil, aerospace and electronics industries due to their outstanding mechanical properties, good thermooxidative stability and chemical resistance. However, the feasibility of the wide applications is hindered due to the difficulty of their processing derived from the very rigid structure. Poly(aryl-ether benzoxazole) random copolymers (PAEXBOx) were prepared by nucleophilic polycondensation. Ary-ether ketone and aryl-ether sulfone segments along with flexible linkages and bulky groups were introduced to provide PAEXBOx with goo

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37

Shakhmurzova, K. T., Zh I. Kurdanova, Arthur E. Baikaziev, Karina Kh Teunova, Azamat A. Zhansitov, and S. Yu Khashirova. "Methods for the Synthesis of Polyethereketone." Materials Science Forum 935 (October 2018): 27–30. http://dx.doi.org/10.4028/www.scientific.net/msf.935.27.

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The data on the methods for the preparation of polyetherketones by electrophilic and nucleophilic methods are considered and generalized. It is shown that polyetherketones by electrophilic substitution are carried out as homopolycondensation aromatic monocarboxylic acids and their halides and polycondensation of polynuclear aromatic hydrocarbons with aromatic dicarboxylic acids or their halides, and phosgene in organic solvents (1,2-dichloroethane, methylene chloride, nitrobenzene and etc.) in the presence of Ziegler-Natt catalysts. However, this process has not found an industrial application

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38

Liljenberg, Magnus, Tore Brinck, Tobias Rein та Mats Svensson. "Utilizing the σ-complex stability for quantifying reactivity in nucleophilic substitution of aromatic fluorides". Beilstein Journal of Organic Chemistry 9 (23 квітня 2013): 791–99. http://dx.doi.org/10.3762/bjoc.9.90.

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A computational approach using density functional theory to compute the energies of the possible σ-complex reaction intermediates, the “σ-complex approach”, has been shown to be very useful in predicting regioselectivity, in electrophilic as well as nucleophilic aromatic substitution. In this article we give a short overview of the background for these investigations and the general requirements for predictive reactivity models for the pharmaceutical industry. We also present new results regarding the reaction rates and regioselectivities in nucleophilic substitution of fluorinated aromatics.

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39

Malik, Noeen, Shreya Bendre, Ralf Schirrmacher, and Paul Schaffer. "Lewis Acid-Facilitated Radiofluorination of MN3PU: A LRRK2 Radiotracer." Molecules 25, no. 20 (2020): 4710. http://dx.doi.org/10.3390/molecules25204710.

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Background: Temperature-sensitive radiopharmaceutical precursors require lower reaction temperatures (<100 °C) during nucleophilic radiofluorination in order to avoid compound thermolysis, often resulting in sub-optimal radiochemical yields (RCYs). To facilitate nucleophilic aromatic substitution (SNAr) of nucleofuges commonly used in radiofluorination (e.g., nitro group), we explored the use of Lewis acids as nucleophilic activators to accelerate [18F]fluoride incorporation at lower temperatures, and thereby increasing RCYs for thermolabile activated precursors. Lewis acid-assisted radiofl

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40

Zhang, Zi-Yang, Shou-Ri Sheng, Xiao-Lan Zhang, Yang Pan, and Xiao-Ling Liu. "New poly(aryl ether ketone)s containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups." High Performance Polymers 32, no. 7 (2020): 753–60. http://dx.doi.org/10.1177/0954008319901148.

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4-(4-Diphenylphosphino)phenyl-2,6-bis(4-hydroxyphenyl)pyridine, as a new bisphenol monomer, was prepared from 4-(diphenylphosphino)benzaldehyde and 4-hydroxyacetophenone and used in the preparation of several aromatic poly(ether ketone)s (PEKs) containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups via a nucleophilic aromatic substitution polycondensation with difluorinated aromatic ketones. The polycondensation proceeded quantitatively in tetramethylene sulfone in the presence of anhydrous potassium carbonate and afforded the polymers with high molecular weights. The

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41

Li, Jinhuan, Lijun Dai, and Chao Wang. "A new class of aromatic poly(ether-ketone benzoxazole) copolymers by nucleophilic polycondensation: Synthesis and properties." European Polymer Journal 44, no. 2 (2008): 483–93. http://dx.doi.org/10.1016/j.eurpolymj.2007.12.001.

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42

Yap, Jeremy L., Kellie Hom, and Steven Fletcher. "Ortho-selectivity in the nucleophilic aromatic substitution (SNAr) reactions of 3-substituted, 2,6-dichloropyridines with alkali metal alkoxides." Tetrahedron Letters 52, no. 32 (2011): 4172–76. http://dx.doi.org/10.1016/j.tetlet.2011.06.007.

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43

Grossi, Loris. "Nucleophilic aromatic substitution (SNAr): Evidence of an electron transfer process in the reaction between acyclic alkyl amines and both aromatic and heteroaromatic halides." Tetrahedron Letters 33, no. 38 (1992): 5645–48. http://dx.doi.org/10.1016/s0040-4039(00)61169-3.

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44

Ganesh, Shimoga D., Vasantakumar K. Pai, Mahadevappa Y. Kariduraganavar, and Madhu B. Jayanna. "Functional Aromatic Poly(1,3,4-Oxadiazole-Ether)s with Benzimidazole Pendants: Synthesis, Thermal and Dielectric Studies." International Scholarly Research Notices 2014 (October 8, 2014): 1–8. http://dx.doi.org/10.1155/2014/790702.

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Poly(1,3,4-oxadiazole-ether) with reactive carboxylic acid pendants was synthesized from solution polymerization via nucleophilic displacement polycondensation among 2,5-bis(4-fluorophenyl)-1,3,4-oxadiazole (BFPOx) and 4,4′-bis(4-hydroxyphenyl) valeric acid (BHPA). Without altering the polymeric segments, benzimidazole modified poly(1,3,4-oxadiazole-ether)s were prepared by varying stoichiometric ratios of 1,2-phenylenediamine. The molecular structural characterization of these polymers was achieved by, FT-IR, NMR, TGA, elemental analysis, and analytical techniques. The weight-average molecula

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Loughhead, David G., Lee A. Flippin, and Robert J. Weikert. "Synthesis of Mexiletine Stereoisomers and Related Compounds via SNAr Nucleophilic Substitution of a Cr(CO)3-Complexed Aromatic Fluoride." Journal of Organic Chemistry 64, no. 9 (1999): 3373–75. http://dx.doi.org/10.1021/jo982287c.

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Danikiewicz, Witold, Tomasz Bieńkowski, Dorota Kozłowska, and Magdalena Zimnicka. "Aromatic nucleophilic substitution (SNAr) Reactions of 1,2- and 1,4-halonitrobenzenes and 1,4-dinitrobenzene with carbanions in the gas phase." Journal of the American Society for Mass Spectrometry 18, no. 8 (2007): 1351–63. http://dx.doi.org/10.1016/j.jasms.2007.04.005.

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Thiruvasagam, P., C. Shiva, C. Sundararaman, and D. Venkatesan. "Synthesis and Characterization of New Diimide Diols and Processable Poly(esterimide)s Derived Therefrom." Polymers and Polymer Composites 19, no. 9 (2011): 763–72. http://dx.doi.org/10.1177/096739111101900906.

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New aromatic diimide-diol monomers were prepared by the aromatic nucleophilic substitution reaction of aromatic dianhydrides and 4-aminophenol/(4-aminophenyl)-2'-(4-hydroxy phenyl)propane. The monomers were characterized by IR and 1H-NMR spectroscopy. A series of poly(esterimide)s was prepared from diimide-diols and aromatic diacid chlorides by solution polycondensation reaction in N-methyl-2-pyrrolidone. The poly(esterimide)s were characterized by IR and 1H-NMR spectroscopy, X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, gel-permeation chromatography, soluti

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Liu, Yongjun, Ming Zhong, Chen Song, Shouri Sheng, Xiaoling Liu, and Haoqing Hou. "Preparation and properties of novel alternating poly(aryl ether ketone)." High Performance Polymers 31, no. 4 (2018): 409–16. http://dx.doi.org/10.1177/0954008318778886.

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Novel alternating poly(aryl ether ketone)s (PAEKs) were prepared from a multiple aromatic difluoroketone monomer, that is, containing six aromatic rings via nucleophilic substitution polycondensation with various bisphenols. Each chain segment of the synthesized poly aryl ether ketone alternating copolymer was regularly separated by bisphenol units, which resulted in improvements in their thermal stability and solubility in common organic solvents. All glass transition temperatures of the alternating PAEKs were above 179°C, and the temperatures at 5% weight loss were above 446°C under nitrogen

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Kurdanova, Zhanna I., Kamila T. Shakhmurzova, Azamat A. Zhansitov, Arthur E. Baykaziev, Karina Kh Teunova, and Svetlana Yu Khashirova. "METHODS FOR SYNTHESIS OF POLYETHERIMIDES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 6 (2019): 4–14. http://dx.doi.org/10.6060/ivkkt.20196206.5892.

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The review summarizes and systematizes the currently known data on the synthesis of polyetherimides. Polyetherimides are a promising class of high-quality polymeric materials with a valua-ble set of properties that can be directed to the appropriate design of the polymer chain. Thus, to obtain polyetherimide with a lower glass transition temperature, as much as possible of ether bonds are introduced into the macromolecule, as well as m-phenylene fragments that increase the flexibility of the polymer chain. Polyetherimides of this structure are amorphous and soluble in a number of amide solvent

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Hibbert, D. Brynn, John P. B. Sandall, Jonathan R. Lovering, John H. Ridd, and Taher I. Yousaf. "Polymerisation and related reactions involving nucleophilic aromatic substitution. Part 3. Mathematical models of the polycondensation reactions of halogenobenzophenones." Journal of the Chemical Society, Perkin Transactions 2, no. 9 (1988): 1739. http://dx.doi.org/10.1039/p29880001739.

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