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Journal articles on the topic 'Ethynyl group'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

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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2

Paul, Ratan Kumar, Md Faruak Ahmad, Mohammad Mizanur Rahman Khan, and Muhammad Younus. "Synthesis and Antibacterial Activities of Sugar-containing Platinum Ethynyl Complexes." Journal of Bangladesh Academy of Sciences 40, no. 1 (2016): 65–77. http://dx.doi.org/10.3329/jbas.v40i1.28326.

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New sugar-containing aryl ethynyl ligand [N-(4-trimethylsilylethynylphenyl)-?-D-glucopyranosylamine] 2 has been prepared by the reaction of [N-(4-iodophenyl)-?-D-glucopyranosylamine] 1 with trimethysilylacetylene in the presence of Pd(OAc)2/CuI catalyst, in iPr2NH and DMF solvent mixture. The trimethylsilyl group of compound 2 was deprotected using K2CO3 in methanol to form terminal ethynylene ligand [N-(?-D-glucopyranosyl)aniline-4-ethyne] 3. Novel platinum mono-ethynyl complex trans-[(P(Bu)3)2PtCl(C?C-4-C6H4-NH-D-glocose)] 4 and bis-ethynyl complex trans-[(P(Bu)3)2PtCl(C?C-4-C6H4-NH-D-glocos

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3

Nagy, Fehér, Dargó, et al. "Comparison of Cinchona Catalysts Containing Ethyl or Vinyl or Ethynyl Group at Their Quinuclidine Ring." Materials 12, no. 18 (2019): 3034. http://dx.doi.org/10.3390/ma12183034.

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Numerous cinchona organocatalysts with different substituents at their quinuclidine unit have been described and tested, but the effect of those saturation has not been examined before. This work presents the synthesis of four widely used cinchona-based organocatalyst classes (hydroxy, amino, squaramide, and thiourea) with different saturation on the quinuclidine unit (ethyl, vinyl, ethynyl) started from quinine, the most easily available cinchona derivative. Big differences were found in basicity of the quinuclidine unit by measuring the pKa values of twelve catalysts in six solvents. The eff

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4

Harris, Benjamin L., та Jonathan M. White. "Application of the Variable Oxygen Probe to Determine the π-Electron Donor Ability of the Alkyne Group". Australian Journal of Chemistry 67, № 12 (2014): 1866. http://dx.doi.org/10.1071/ch14395.

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Eight ester and ether derivatives of propargyl alcohol with varying electron demand were structurally characterised using low temperature X-ray crystallography, these were combined with seven derivatives obtained from the Cambridge Structural Database. Variable oxygen probe analysis of these derivatives provided evidence that the ethynyl substituent is a relatively weak π-electron donor, and is a slightly less effective donor than the C–C bond of an ethyl substituent.

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5

Lee, Eun-Bee, Hyunil Ryu, Insu Lee, et al. "Synthetic anion transporters that bear a terminal ethynyl group." Chemical Communications 51, no. 45 (2015): 9339–42. http://dx.doi.org/10.1039/c5cc01903f.

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6

Úr, Györgyi, Tamás Kálai, Mária Balog, Balázs Bognár, Gergely Gulyás-Fekete, and Kálmán Hideg. "Synthesis of New Pyrroline Nitroxides with Ethynyl Functional Group." Synthetic Communications 45, no. 18 (2015): 2122–29. http://dx.doi.org/10.1080/00397911.2015.1066391.

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7

Hsu, Chih-Hung, Rong Hu, Ginger E. Dutschman, et al. "Comparison of the Phosphorylation of 4′-Ethynyl 2′,3′-Dihydro-3′-Deoxythymidine with That of Other Anti-Human Immunodeficiency Virus Thymidine Analogs." Antimicrobial Agents and Chemotherapy 51, no. 5 (2007): 1687–93. http://dx.doi.org/10.1128/aac.01432-06.

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ABSTRACT Thymidine analogs, including 3′-azido-3′-deoxythymidine (AZT) and 2′,3′-dideoxy-3′-deoxythymidine (D4T), are important antiretroviral agents. To exert antiretroviral activity, these analogs undergo a stepwise phosphorylation intracellularly to the active triphosphate metabolites. We previously reported that 4′-substituted D4T with an ethynyl group (i.e., 4′-ethynyl D4T) increased the anti-human immunodeficiency virus (HIV) activity and was active against multidrug-resistant HIV strains. 4′-Ethynyl D4T is a better substrate for phosphorylation by human thymidine kinase 1 than D4T is. I

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8

Cha, Won-Young, Juwon Oh, Masaaki Kitano, Atsuhiro Osuka, and Dongho Kim. "meso-Arylethynyl subporphyrins as efficient and tunable photo-induced electron transfer units." Journal of Porphyrins and Phthalocyanines 21, no. 02 (2017): 152–57. http://dx.doi.org/10.1142/s1088424617500249.

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Excited state dynamics of meso-arylethynyl-substituted subporphyrins can be tuned by 4-substituent at the arylethynyl group and solvent polarity. In polar acetonitrile, phenylethynyl subporphyrin 1 exhibited enhanced fluorescence, while (4-dimethylaminophenyl)ethynyl subporphyrin 2 showed red-shifted fluorescence from its charge-separated state and (4-nitrophenyl)ethynyl subporphyrin 3 displayed efficient fluorescence quenching due to charge separation.

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9

Batsyts, Sviatoslav, Francisco J. Ramírez, Juan Casado, Jan C. Namyslo, and Andreas Schmidt. "Chemistry and spectroscopy of cross-conjugated and pseudo-cross-conjugated quinolinium-ethynyl-benzoate mesomeric betaines." Zeitschrift für Naturforschung B 73, no. 7 (2018): 481–91. http://dx.doi.org/10.1515/znb-2018-0020.

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AbstractThe three isomers 1-methylquinolinium-2-, 3-, and 4-ethynyl(phenyl-4-carboxylates) belong to two distinct types of heterocyclic mesomeric betaines. The quinolinium substituted in position 3 is a cross-conjugated mesomeric betaine (CCMB), whereas the quinolinium derivatives substituted in positions 2 and 4 are members of the class of pseudo-cross-conjugated mesomeric betaines (PCCMBs). While the charges are strictly separated within the common π-electron system of the CCMB according to the canonical formulae, the charges are effectively but not exclusively delocalized in the PCCMBs beca

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10

Zhu, Ren-Yi, Long Chen, Xiao-Si Hu, Feng Zhou, and Jian Zhou. "Enantioselective synthesis of P-chiral tertiary phosphine oxides with an ethynyl group via Cu(i)-catalyzed azide–alkyne cycloaddition." Chemical Science 11, no. 1 (2020): 97–106. http://dx.doi.org/10.1039/c9sc04938j.

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11

Janjua, Muhammad Ramzan Saeed Ashraf. "Structural Properties and Nonlinear Optical Responses of Halogenated Compounds: A DFT Investigation on Molecular Modelling." Open Chemistry 16, no. 1 (2018): 978–85. http://dx.doi.org/10.1515/chem-2018-0113.

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AbstractComputational chemistry is used to evaluate structures of different compounds by using principles of theoretical and quantum chemistry integrated into useful computer programs. It is used to determine energies, dipole moments and thermodynamic properties of different compounds. The present work reports the computational study of six donor-acceptor dyes. The computational method CAM-B3LYP with 6-31G(d,p) was used in this research to determine the effect of halogens on non-linear optical compounds. HOMO-LUMO energy gaps, dipole polarizabilities, first hyperpolarizabilities, and absorptio

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12

Han, Xiao-Jie, Hua-Feng Fei, Bo-Zheng Liu, et al. "High-yielding and facile synthesis of organosilicon compounds containing a m-carboranylmethyl group." RSC Advances 5, no. 93 (2015): 76079–82. http://dx.doi.org/10.1039/c5ra13344k.

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A method for synthesizing bis(silymethyl)-m-carborane has been developed, the yield was reached up to 88%. The intermediate Si–Br compound could be functionalized, Si–OH, Si-vinyl, Si-ethynyl and Si–H of bissilylmethyl-m-carborane were synthesized.

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13

Lee, Sunhee, Jisu Shin, Doo-Hyun Ko, and Won-Sik Han. "A new type of carborane-based electron-accepting material." Chemical Communications 56, no. 84 (2020): 12741–44. http://dx.doi.org/10.1039/d0cc04684a.

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14

Steiner, T., S. A. Mason, and M. Tamm. "Neutron Diffraction Study of Aromatic Hydrogen Bonds: 5-Ethynyl-5H-dibenzo[a,d]cyclohepten-5-ol at 20K." Acta Crystallographica Section B Structural Science 53, no. 5 (1997): 843–48. http://dx.doi.org/10.1107/s0108768197006174.

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The neutron diffraction crystal structure of the title compound, C17H12O, was determined at 20 K. One of the benzyl groups accepts intermolecular hydrogen bonds from a hydroxyl and an ethynyl group, one to each face of the ring. The bond donated by the hydroxyl group points almost linearly to an aromatic C atom with a H...C separation of 2.339 (6) Å. The bond donated by the ethynyl group points to the aromatic midpoint M with a H...M separation of 2.587 (5) Å. The average acetylenic C—H bond length determined by low- temperature neutron diffraction is only 1.062 (6) Å, appreciably shorter than

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15

Furuhata, Takafumi, Yuki Komoto, Takahito Ohshiro, Masateru Taniguchi, Ryosuke Ueki, and Shinsuke Sando. "Key aurophilic motif for robust quantum-tunneling-based characterization of a nucleoside analogue marker." Chemical Science 11, no. 37 (2020): 10135–42. http://dx.doi.org/10.1039/d0sc03946b.

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16

Hayashi, Satoko, Kentaro Yamane, and Waro Nakanishi. "Fine Structures of 8-G-1-(p-YC6H4C ≡ CSe)C10H6(G = H, Cl, and Br) in Crystals and Solutions: Ethynyl Influence and Y- and G-Dependences." Bioinorganic Chemistry and Applications 2009 (2009): 1–11. http://dx.doi.org/10.1155/2009/347359.

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Fine structures of 8-G-1-(p-YC6H4C ≡ CSe)C10H6[1(G = H) and2(G = Cl): Y = H (a), OMe (b), Me (c), F (d), Cl (e), CN (f), andNO2(g)] are determined by the X-ray analysis. Structures of1,2, and3(G = Br) are calledAif each Se–Cspbond is perpendicular to the naphthyl plane, whereas they areBwhen the bond is placed on the plane. Structures are observed asAfor1a–cbearing Y of nonacceptors, whereas they areBfor1e–gwith Y of strong acceptors. The change in the structures of1e–gversus those of1a–cis called Y-dependence in1. The Y-dependence is very specific in1relative to 1-(p-YC6H4Se)C10H7(4) due to t

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17

Liu, Guoqing, Liyuan Ren, Mengting Zhang, et al. "Synthesis and properties of benzoxazole-based liquid crystals containing ethynyl group." Liquid Crystals 47, no. 12 (2020): 1719–28. http://dx.doi.org/10.1080/02678292.2020.1721582.

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18

Lucas, Xavier, David Quiñonero, Antonio Frontera та Pere M. Deyà. "Counterintuitive Substituent Effect of the Ethynyl Group in Ion−π Interactions". Journal of Physical Chemistry A 113, № 38 (2009): 10367–75. http://dx.doi.org/10.1021/jp905701p.

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19

Rouillé, G., S. A. Krasnokutski, D. Fulvio, et al. "DISSOCIATIVE PHOTOIONIZATION OF POLYCYCLIC AROMATIC HYDROCARBON MOLECULES CARRYING AN ETHYNYL GROUP." Astrophysical Journal 810, no. 2 (2015): 114. http://dx.doi.org/10.1088/0004-637x/810/2/114.

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20

Kang, Beom-Goo, Jingon Jang, Younggul Song, Myung-Jin Kim, Takhee Lee, and Jae-Suk Lee. "Facile anionic synthesis of a well-controlled thermally cross-linkable block copolymer for polymer-based resistive memory device applications." Polymer Chemistry 6, no. 23 (2015): 4264–70. http://dx.doi.org/10.1039/c5py00381d.

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21

Ngoc, Thuc Dinh, Wim Dehaen, Luc Van Meervelt, and Jan Balzarini. "Synthesis of Heterocyclic Triterpene Derivatives with Biological Activities via Click Reaction." Current Organic Chemistry 23, no. 26 (2020): 2969–74. http://dx.doi.org/10.2174/1385272823666191212110411.

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: Grignard reactions were applied to synthesize 2-ethynyl-2-hydroxylallobetulin 5 from 2-oxoallobetulin 4. The compound plays an important role as starting material to synthesize heterocyclic triterpenes using the click reaction. A series of new 1,2,3-triazole derivatives derived from 2-oxoallobetulin were successfully obtained. Under similar reaction conditions, only one compound 6 kept the hydroxyl functional group, while in the other compounds 7, 8 and 9, water was eliminated. The structures of obtained compounds were confirmed by 2D-NMR spectroscopy. The X-ray analysis of 5 indicated that

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22

Martín-Sómer, Ana, Otilia Mó, Manuel Yáñez, and Jean-Claude Guillemin. "Acidity enhancement of unsaturated bases of group 15 by association with borane and beryllium dihydride. Unexpected boron and beryllium Brønsted acids." Dalton Transactions 44, no. 3 (2015): 1193–202. http://dx.doi.org/10.1039/c4dt02292k.

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23

Zhang, Hui, Lixia Guo, Yunxia Wang, and Liheng Feng. "Molecular engineering to boost the photothermal effect of conjugated oligomer nanoparticles." Biomaterials Science 9, no. 6 (2021): 2137–45. http://dx.doi.org/10.1039/d0bm02094j.

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A novel molecular engineering strategy to enhance the photothermal performance of conjugated molecules was developed by introducing the ethynyl group into the structure for effective antibacterial therapy.

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24

Reeta, P. Silviya, L. Giribabu, S. Senthilarasu, et al. "Ethynyl thiophene-appended unsymmetrical zinc porphyrin sensitizers for dye-sensitized solar cells." RSC Adv. 4, no. 27 (2014): 14165–75. http://dx.doi.org/10.1039/c3ra47948j.

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Zn porphyrin sensitizers with ethynyl thiophene linker, pyrene/fluorene donors and cyanoacrylic or malonic acid anchoring group were synthesized for DSSC applications. Conversion efficiency up to 3.14% was exhibited.

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25

Dallaire, Carol, Michael A. Brook, Alex D. Bain, Christopher S. Frampton, and James F. Britten. "Tetrakis[(trimethylsilyl)ethynyl] Group 14 metal derivatives: an examination of the electronic interaction between two Group 14 metals connected by an acetylene wire." Canadian Journal of Chemistry 71, no. 10 (1993): 1676–83. http://dx.doi.org/10.1139/v93-209.

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The tetrakis(trimethylsilyl)ethynyl derivatives of Si, Ge, Sn, and Pb were prepared and examined spectroscopically. NMR and Mössbauer spectroscopy and X-ray crystal structure data clearly demonstrate an electronic interaction in the ground state between the distal SiMe3 groups and the central metal atom, leading to a strong shielding of the central metal atom; the respective nmr signals of the central metal are among the most shielded examples reported for a tetrahedral Group 14 metal centre with four carbon ligands. The nature of these electronic interactions is discussed.

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26

Zähringer, Till J. B., Maria-Sophie Bertrams, and Christoph Kerzig. "Purely organic Vis-to-UV upconversion with an excited annihilator singlet beyond 4 eV." Journal of Materials Chemistry C 10, no. 12 (2022): 4568–73. http://dx.doi.org/10.1039/d1tc04782e.

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Biphenyl at its best: a (triisopropylsilyl)ethynyl group in para position converts biphenyl into a UV annihilator that is successfully employed for blue-to-UV upconversion with unprecedented output photon energies.

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27

Seo, Siyoong, Kazumitsu Onizuka, Chieko Nishioka, et al. "Phosphorylated 5-ethynyl-2′-deoxyuridine for advanced DNA labeling." Organic & Biomolecular Chemistry 13, no. 15 (2015): 4589–95. http://dx.doi.org/10.1039/c5ob00199d.

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The representative DNA-labeling agent 5-ethynyl-2′-deoxyuridine (EdU) was chemically modified to improve its function. Monophosphrylation was to enhance its efficiency and bis-pivaloyloxymethyl protecting group was for membrane permeability.

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28

Rondeau-Gagné, Simon, Antoine Lafleur-Lambert, Armand Soldera, and Jean-François Morin. "Ethynyl-bridged fullerene derivatives: effect of the secondary group on electronic properties." New Journal of Chemistry 35, no. 4 (2011): 942. http://dx.doi.org/10.1039/c1nj20011a.

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29

Zhang, Peng, Wenting Xue, Pei Liu, and Lihua Gan. "Optical properties and electronic structure of terminal group-perturbed ethynyl-linked dendrimers." Synthetic Metals 161, no. 21-22 (2011): 2289–94. http://dx.doi.org/10.1016/j.synthmet.2011.08.036.

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30

Lucas, Xavier, Antonio Frontera, David Quiñonero та Pere M. Deyà. "Substituent Effects in Ion−π Interactions: Fine-Tuning via the Ethynyl Group". Journal of Physical Chemistry A 114, № 4 (2010): 1926–30. http://dx.doi.org/10.1021/jp9089672.

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31

Gao, Liang, Ke-Meng Wang, Rui Zhao, Hong-Mei Ma, and Yu-Bao Sun. "Effect of a Dual Functional Polymer on the Electro-Optical Properties of Blue Phase Liquid Crystals." Polymers 11, no. 7 (2019): 1128. http://dx.doi.org/10.3390/polym11071128.

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The effects of the fluorinated monomer with an ethynyl group on the electro-optical properties of polymer-stabilized blue phase liquid crystals (PSBPLCs) were investigated in different polymer systems. In rigid polymer systems, the Kerr constant can be increased by about 27.6%, while keeping a microsecond response time. In soft polymer systems, hysteresis decreased by about 45.5% and residual birefringence can be reduced from 1.85% to 0.6%. The above phenomena exhibited dual functions of affecting the anchoring energy and the viscosity of the system simultaneously. The results provide a potent

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32

Shibata, Masashi, Kazunari Nakajima, and Yoshiaki Nishibayashi. "Enantioselective intramolecular propargylic amination using chiral copper–pybox complexes as catalysts." Chem. Commun. 50, no. 58 (2014): 7874–77. http://dx.doi.org/10.1039/c4cc01676a.

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Intramolecular propargylic amination of propargylic acetates bearing an amino group at the suitable position in the presence of chiral copper–pybox complexes proceeds enantioselectively to give optically active 1-ethynyl-isoindolines (up to 98% ee).

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33

Hsu, Fang-Chi, Ming-Kuang Hsieh, Chiranjeevulu Kashi, Chen-Yu Yeh, Tai-Yuan Lin, and Yang-Fang Chen. "Porphyrin dimers as donors for solution-processed bulk heterojunction organic solar cells." RSC Advances 6, no. 65 (2016): 60626–32. http://dx.doi.org/10.1039/c6ra04746g.

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We synthesize a novel class of porphyrin dimers consisting of two zinc-metalated porphyrin units covalently linked through ethynyl or butadiyne group as electron donors for the fabrication of organic bulk heterojunction (BHJ) solar cells.

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34

Bosch, Eric, Nathan P. Bowling, and Shalisa M. Oburn. "Conformational control through co-operative nonconventional C—H...N hydrogen bonds." Acta Crystallographica Section C Structural Chemistry 77, no. 8 (2021): 485–89. http://dx.doi.org/10.1107/s2053229621007427.

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We report the design, synthesis, and crystal structure of a conjugated aryleneethynyl molecule, 2-(2-{4,5-dimethoxy-2-[2-(2,3,4-trifluorophenyl)ethynyl]phenyl}ethynyl)-6-[2-(pyridin-2-yl)ethynyl]pyridine, C30H17F3N2O2, that adopts a planar rhombus conformation in the solid state. The molecule crystallizes in the space group P-1, with Z = 2, and features two intramolecular sp2 -C—H...N hydrogen bonds that co-operatively hold the arylethynyl molecule in a rhombus conformation. The H atoms are activated towards hydrogen bonding since they are situated on a trifluorophenyl ring and the H...N dista

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35

Sheng, Liu-Qing, Wan-Gen Liang, Gang Chen та Hua-Feng Shen. "17α-Ethynyl-17β-hydroxyandrosta-1,4-dien-3-one". Acta Crystallographica Section E Structure Reports Online 63, № 3 (2007): o1182—o1183. http://dx.doi.org/10.1107/s1600536807005223.

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In the title molecule, C21H26O2, there are two C=C bonds [1.321 (4) and 1.334 (4) Å], which contribute to the planarity of ring A along with the carbonyl group. Rings B and C have regular chair conformations, while ring D has an envelope conformation. In the crystal structure, intermolecular O—H...O and C—H...O hydrogen bonds link the molecules into corrugated sheets parallel to the ab plane.

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36

Song, Xiongrong, Weiwei Zhang, Xin Li, Huiyun Jiang, Chao Shen та Wei-Hong Zhu. "Influence of ethynyl position on benzothiadiazole based D–A–π–A dye-sensitized solar cells: spectral response and photovoltage performance". Journal of Materials Chemistry C 4, № 39 (2016): 9203–11. http://dx.doi.org/10.1039/c6tc03418g.

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Three D–A–π–A featured organic dyes has been designed for systematic insight into the effect of ethynyl positions on photovoltaic performances. Insertion of triple bond close to anchoring group exhibits better photovoltaic performance with higher open-circuit voltage.

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37

Minakawa, Noriaki, and Akira Matsuda. "Mechanism-based Design . of Inosine 5'-Monophosphate Dehydrogenase Inhibitors: Synthesis and Biological Activities of 5-Ethynyi-1- -D-ribofuranosylimidazole-4-carboxamide (EICAR) and its Derivatives." Current Medicinal Chemistry 6, no. 7 (1999): 615–28. http://dx.doi.org/10.2174/092986730607220401124052.

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Inosine 5'-monophosphate dehydrogenase (IMPDH) catalyzes the nicotinamide adenine dinucleotide (NAD)-dependent oxidation of inosine 5'-monophosphate (IMP) to xanthosine 5'-monophosphate (XMP), and is one of the key rate-determining enzymes of de novo guanine nucleotide biosynthesis in mammalian systems. Based on the proposed catalytic mechanism of IMPDH, we designed and synthesized 5-ethynyi-1- D-ribofuranosylimidazole-4-carboxamide (Sb, EICAR) from 5-amino-1- -D-ribofuranosylimida zole-4-carboxamide (AICAR) via palladium chemistry. EICAR is a potent cytostatic agent that inhibits various t

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38

Peng, Lifen, Feng Xu, Kenta Shinohara, et al. "Remarkable electron-withdrawing effect of the Ph2P(O)-ethynyl group: Ph2P(O)-ethynyl-substituted aryl halides and copper acetylides for tailor-made Sonogashira couplings." Organic Chemistry Frontiers 2, no. 3 (2015): 248–52. http://dx.doi.org/10.1039/c4qo00325j.

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39

Xu, Feng, Takanori Nishida, Kenta Shinohara, et al. "Trimethylsilyl Group Assisted Stimuli Response: Self-Assembly of 1,3,6,8-Tetrakis((trimethysilyl)ethynyl)pyrene." Organometallics 36, no. 3 (2017): 556–63. http://dx.doi.org/10.1021/acs.organomet.6b00781.

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40

Nomoto, Akihiro, Go Shiino, and Akiya Ogawa. "Palladium-catalyzed regioselective introduction of chalcogen moieties into porphyrin bearing an ethynyl group." Research on Chemical Intermediates 35, no. 8-9 (2009): 965–71. http://dx.doi.org/10.1007/s11164-009-0087-8.

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41

Tsuda, Katsuyuki, Wataru Hirahata, Kazuaki Yokota, Toyoji Kakuchi, Takashi Ishizone, and Akira Hirao. "Radical polymerization of (trimethylsilylethynyl)styrene and thermal properties of polystyrene with ethynyl group." Polymer Bulletin 39, no. 2 (1997): 173–78. http://dx.doi.org/10.1007/s002890050135.

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42

Chlupatý, T., J. Turek, F. De Proft, Z. Růžičková, and A. Růžička. "Addition of in situ reduced amidinato-methylaluminium chloride to acetylenes." Dalton Transactions 44, no. 40 (2015): 17462–66. http://dx.doi.org/10.1039/c5dt03128a.

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Addition of in situ reduced amidinato-methylaluminium chloride to acetylenes was observed. Whether the structure of the products contains an ethylene bridge or terminally bonded ethynyl groups, and the further reactivity of the products are closely related to the substituents on the CC group.

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43

Gao, Chang, Jingjing Li, Jipan Yu, Haijun Yang, and Hua Fu. "Visible-light photoredox synthesis of internal alkynes containing quaternary carbons." Chemical Communications 52, no. 45 (2016): 7292–94. http://dx.doi.org/10.1039/c6cc01632d.

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A novel and efficient visible-light photoredox method for the synthesis of internal alkynes containing quaternary carbons has been developed via coupling reactions of N-phthalimidoyl oxalates of tert-alcohols with 1-(2-(arylsulfonyl)ethynyl)benzenes. The reactions proceeded well at room temperature with good functional group tolerability.

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44

Allen, Frank H., Peter A. Wood, and Peter T. A. Galek. "The versatile role of the ethynyl group in crystal packing: an interaction propensity study." Acta Crystallographica Section B Structural Science Crystal Engineering and Materials 69, no. 3 (2013): 281–87. http://dx.doi.org/10.1107/s2052519213008208.

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45

Torres, Érica, Sara Sequeira, Pedro Parreira та ін. "Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells". Journal of Photochemistry and Photobiology A: Chemistry 310 (вересень 2015): 1–8. http://dx.doi.org/10.1016/j.jphotochem.2015.05.017.

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46

Riesco-Domínguez, Alejandra, Hussein Hammoudeh, Daniel Blanco-Ania, and Floris P. J. T. Rutjes. "Synthesis of Ethynyl Trifluoromethyl Sulfide and Its Application to the Synthesis of CF3S-Containing Triazoles." Molecules 30, no. 11 (2025): 2358. https://doi.org/10.3390/molecules30112358.

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The unprecedented use of ethynyl trifluoromethyl sulfide (CF3S–C≡CH) as a synthetically useful building block has been described for the first time. It was reacted with various aromatic and aliphatic azides under copper-catalyzed conditions to yield a novel class of 1,4-disubstituted triazoles bearing the SCF3 group (15 examples, up to 86% yield).

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47

Bernet, Bruno, Roland Bürli, Jinwang Xu, and Andrea Vasella. "Influence of an Ethynyl or a Buta-1,3-diynyl Group on the Chemical Shifts of Hydroxy Groups of Glucopyranoses." Helvetica Chimica Acta 85, no. 6 (2002): 1800–1811. http://dx.doi.org/10.1002/1522-2675(200206)85:6<1800::aid-hlca1800>3.0.co;2-s.

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48

Huang, Xiao, Li Yang, Rikard Emanuelsson, et al. "A versatile route to polythiophenes with functional pendant groups using alkyne chemistry." Beilstein Journal of Organic Chemistry 12 (December 9, 2016): 2682–88. http://dx.doi.org/10.3762/bjoc.12.265.

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A new versatile polythiophene building block, 3-(3,4-ethylenedioxythiophene)prop-1-yne (pyEDOT) (3), is prepared from glycidol in four steps in 28% overall yield. pyEDOT features an ethynyl group on its ethylenedioxy bridge, allowing further functionalization by alkyne chemistry. Its usefulness is demonstrated by a series of functionalized polythiophene derivatives that were obtained by pre- and post-electropolymerization transformations, provided by the synthetic ease of the Sonogashira coupling and click chemistry.

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Sarbu, Laura G., Henning Hopf, Peter G. Jones, and Lucian M. Birsa. "Selenium halide-induced bridge formation in [2.2]paracyclophanes." Beilstein Journal of Organic Chemistry 10 (October 31, 2014): 2550–55. http://dx.doi.org/10.3762/bjoc.10.266.

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An addition/elimination sequence of selenium halides to pseudo-geminally bis(acetylene) substituted [2.2]paracyclophanes leads to new bridges with an endo-exo-diene substructure. The reactions have been found to be sensitive to the substitution of the ethynyl group. The formation of dienes with a zig-zag configuration is related to that observed for non-conjugated cyclic diynes of medium ring size.

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Ali, Hasrat, Samira Osati, Ehtsham H. Khan, Shafiullah, and Johan E. van Lier. "Synthesis of porphyrin-steroid conjugates." Journal of Porphyrins and Phthalocyanines 20, no. 08n11 (2016): 1342–49. http://dx.doi.org/10.1142/s1088424616501054.

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Steroids linked to porphyrin fluorophores are being developed to improve the selectivity of photosensitizers for photodyanamic therapy and fluorescence imaging of steroid-hormone positive cancers. A number of porphyrin derivatives substituted with one or two steroid moieties coupled via a 17[Formula: see text]-ethynyl group of estradiol, testosterone and 19-nortestosterone were synthesized using Pd(II) as a catalyst.

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