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Journal articles on the topic 'Photo-cyclization'

Author: Grafiati

Published: 2 November 2024

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1

Zhao, Lishuang, Hongyue Zhang, Jianing Cui, et al. "Photo-induced synthesis and in vitro antitumor activity of Fenestin A analogs." New Journal of Chemistry 41, no. 23 (2017): 14044–48. http://dx.doi.org/10.1039/c7nj03363j.

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2

Yao, Zhuojun, Xueting Wu, Xiaocui Zhang, Qin Xiong, Shichao Jiang та Zhipeng Yu. "Synthesis and evaluation of photo-activatable β-diarylsydnone-l-alanines for fluorogenic photo-click cyclization of peptides". Organic & Biomolecular Chemistry 17, № 28 (2019): 6777–81. http://dx.doi.org/10.1039/c9ob00898e.

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3

Rajeshkumar, Venkatachalam, and Mihaiela C. Stuparu. "A photochemical approach to aromatic extension of the corannulene nucleus." Chemical Communications 52, no. 64 (2016): 9957–60. http://dx.doi.org/10.1039/c6cc04910a.

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4

Connor, Dennis A., Donald R. Arnold, Pradip K. Bakshi, and T. Stanley Cameron. "Photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction. Part 9: methanol-2,6-dimethyl-1,6-heptadiene, and 1,4-dicyanobenzene." Canadian Journal of Chemistry 73, no. 6 (1995): 762–71. http://dx.doi.org/10.1139/v95-096.

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The photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction of methanol, 2,6-dimethyl-1,6-heptadiene, and 1,4-dicyanobenzene yields three distinct types of 1:1:1 adducts: an acyclic product, 4-(1-methoxymethyl-1,5-dimethyl-5-hexenyl)benzonitrile (8, 5%); a cis–trans pair of cyclohexanes, 4-(3-methoxymethyl-1,3-dimethylcyclohexyl)benzonitrile (9cis (12%) and 9trans (11%)); and a cis–trans pair of cycloheptanes, 4-(4-methoxy-1,4-dimethylcycloheptyl)benzonitrile (10cis (12%) and 10trans (10%)). Variation in the concentration of the nucleophile, methanol, and cod

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5

Chen, Ling, Yu-Ming Cui, Zheng Xu, Jian Cao, Zhan-Jiang Zheng, and Li-Wen Xu. "An efficient approach toward formation of polycyclic coumarin derivatives via carbocation-initiated [4+2] cycloaddition and atom-economical photo-irradiated cyclization." Chemical Communications 52, no. 74 (2016): 11131–34. http://dx.doi.org/10.1039/c6cc05698a.

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Polycyclic coumarin derivatives were easily prepared by carbocation initiated [4+2] cycloaddition of propargyl silyl ethers with ynamides and fluorescent analysis-oriented photo-irradiated cyclization.

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6

Kim, Kyung-su, You Kyoung Chung, Hyunwoo Kim, Chae Yeon Ha, Joonsuk Huh, and Changsik Song. "Additive-free photo-mediated oxidative cyclization of pyridinium acylhydrazones to 1,3,4-oxadiazoles: solid-state conversion in a microporous organic polymer and supramolecular energy-level engineering." RSC Advances 11, no. 4 (2021): 1969–75. http://dx.doi.org/10.1039/d0ra09581h.

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7

Mizutsu, Ryo, Ryosuke Asato, Colin J. Martin та ін. "Photo-Lewis Acid Generator Based on Radical-Free 6π Photo-Cyclization Reaction". Journal of the American Chemical Society 141, № 51 (2019): 20043–47. http://dx.doi.org/10.1021/jacs.9b11821.

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8

Arnold, Donald R., Kimberly A. McManus, and Xinyao Du. "Photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction. Part 6: methanol, nonconjugated dienes, and 1,4-dicyanobenzene." Canadian Journal of Chemistry 72, no. 2 (1994): 415–29. http://dx.doi.org/10.1139/v94-063.

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Irradiation, through Pyrex, of an acetonitrile–methanol (3:1) solution of 1,4-dicyanobenzene (1) and 1,5-hexadiene (9) leads to formation of ortho and meta cyclic adducts (13–16) arising from the intermediate exciplex. There was no evidence for interaction between the two double bonds of this nonconjugated diene. The oxidation potential of 9 is high enough (> 3 V vs. sce) to preclude single electron transfer (SET); no photo-NOCAS products are formed. Similar irradiation of acetonitrile–methanol solutions of 1 and 2-methyl-1,5-hexadiene (10) does yield a photo-NOCAS product (17); reaction oc

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9

Zhou, Zhao-Zhao, Jia-Hui Zhao, Xue-Ya Gou, Xi-Meng Chen, and Yong-Min Liang. "Visible-light-mediated hydrodehalogenation and Br/D exchange of inactivated aryl and alkyl halides with a palladium complex." Organic Chemistry Frontiers 6, no. 10 (2019): 1649–54. http://dx.doi.org/10.1039/c9qo00240e.

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Photo-induced radical reductive dehalogenation of inactivated aryl/alkyl bromides and chlorides with a palladium complex is described. Reductive cyclization, dehalogenative deuteration, and radical addition process can be achieved smoothly.

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10

Sun, Bin, Rongcheng Shi, Kesheng Zhang та ін. "Photoinduced homolytic decarboxylative acylation/cyclization of unactivated alkenes with α-keto acid under external oxidant and photocatalyst free conditions: access to quinazolinone derivatives". Chemical Communications 57, № 49 (2021): 6050–53. http://dx.doi.org/10.1039/d1cc02415a.

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A green and efficient strategy for the synthesis of quinazolinone derivatives via photo-induced decarboxylative cascade radical acylation/cyclization of unactivated alkenes has been developed under oxidant and photocatalyst free conditions.

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11

Abou-Elzahab, Μ. Μ., S. Ν. Ayyad та Μ. T. Zimaity. "Ring Expansion of Carbocyclic β-Keto-ester with Acetylenic Esters". Zeitschrift für Naturforschung B 41, № 3 (1986): 363–66. http://dx.doi.org/10.1515/znb-1986-0312.

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The β-keto-ester 1b and 7 reacted with dimethyl acetylenedicarboxylate (DMAD) to give the cyclooctadienone derivatives (2a and 3b). the acid hydrolysis of which afforded the anhydride 4. Also 1a, b reacted with ethyl propiolate and gave substituted cyclooctadienone (6a, b). Michael reaction of 11 with DMAD gave adduct 12 which underwent cyclization via photo-cycloaddition (2+2) to give the photo-product (14).

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12

An, Yuanyuan, Yunyan Kuang, and Jie Wu. "Synthesis of trifluoromethylated 3,4-dihydroquinolin-2(1H)-ones via a photo-induced radical cyclization of benzene-tethered 1,7-enynes with Togni reagent." Organic Chemistry Frontiers 3, no. 8 (2016): 994–98. http://dx.doi.org/10.1039/c6qo00267f.

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A photoinduced radical cyclization of benzene-tethered 1,7-enynes with Togni reagent in the presence of sodium iodide is developed. This transformation works well without any metals or photo-redox catalysts at room temperature.

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13

Wei, Wen-hao, Takenori Tomohiro, Masato Kodaka, and Hiroaki Okuno. "Photo-regulated cyclization reactions of tetraazamacrocycles with azobenzene derivatives †." Journal of the Chemical Society, Perkin Transactions 1, no. 23 (1999): 3397–98. http://dx.doi.org/10.1039/a907030c.

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14

Fouad, Farid S., Curtis F. Crasto, Yiqing Lin, and Graham B. Jones. "Photoactivated enediynes: targeted chimeras which undergo photo-Bergman cyclization." Tetrahedron Letters 45, no. 41 (2004): 7753–56. http://dx.doi.org/10.1016/j.tetlet.2004.08.130.

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15

Liu, Zhong-Li, Wei Yu, Qiang Liu, Bing Han, Wei Zhang, and Li Yang. "Photo-Induced Radical Cyclization of Aromatic Halides with Sodium Borohydride." Synlett, no. 14 (2005): 2248–50. http://dx.doi.org/10.1055/s-2005-872243.

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16

Evenzahav, Ariella, and Nicholas J. Turro. "Photochemical Rearrangement of Enediynes: Is a “Photo-Bergman” Cyclization a Possibility?" Journal of the American Chemical Society 120, no. 8 (1998): 1835–41. http://dx.doi.org/10.1021/ja9722943.

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17

Wei, Wen-hao, Takenori Tomohiro, Masato Kodaka, and Hiroaki Okuno. "ChemInform Abstract: Photo-Regulated Cyclization Reactions of Tetraazamacrocycles with Azobenzene Derivatives." ChemInform 31, no. 19 (2010): no. http://dx.doi.org/10.1002/chin.200019141.

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18

Buchner, Magnus R., Bernhard Wahl, and Klaus Ruhland. "Intramolecular photo-cyclization and consecutive rearrangement reactions of diazo-functionalized olefin-esters." Journal of Photochemistry and Photobiology A: Chemistry 252 (January 2013): 183–93. http://dx.doi.org/10.1016/j.jphotochem.2012.12.005.

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19

Yamaguchi, Eiji, Yusuke Sudo, Norihiro Tada, and Akichika Itoh. "Rare Metal-Free Photo-Aerobic Intramolecular Dehydrogenative Cyclization Reaction towards Polycyclic Heteroarenes." Advanced Synthesis & Catalysis 358, no. 20 (2016): 3191–95. http://dx.doi.org/10.1002/adsc.201600291.

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20

Oremus, Vladimír, Lubor Fišera, Hans-Joachim Timpe, and Ute Lammel. "An unusually selective photo-induced rearrangement of 4-alkoxycarbonyl-5-formyl-2,3-dihydro-6H-1,3-oxazines. A new route to preparation of condensed lactones." Collection of Czechoslovak Chemical Communications 53, no. 12 (1988): 3171–78. http://dx.doi.org/10.1135/cccc19883171.

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3-R-Alkoxycarbonyl-5-formyl-2,3-dihydro-6H-1,3-oxazines IIa-IIc (R = methyl, ethyl, isopropyl) as primary photoproducts formed by a rearrangement of 3-R-alkoxycarbonyl-3a,4,6,6a-tetrahydrofuro[3,4-d]isoxazoles Ia-Ic undergo cyclization to bicyclic lactones IIIa-IIIc due to further irradiation. The photochemical transformation of compounds II into III constitutes a new kind of photo-induced rearrangement. The quantum yields are very little dependent on the presence of oxygen and polarity of the solvent. The proposed concerted mechanism of the photorearrangement is discussed.

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21

Yang, Qian, Rui Wang, Jie Han, et al. "Photo-induced tandem cyclization of 3-iodoflavones with electron rich five-membered heteroarenes." RSC Advances 7, no. 68 (2017): 43206–11. http://dx.doi.org/10.1039/c7ra07793a.

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Vinyl radicals were generated from 3-iodoflavones and occurred tandem cyclizations to synthesis a broad variety of novel polycyclic xanthone frameworks in good yields under mild and environmentally reaction conditions.

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22

Leitich, Johannes, Ingeborg Heise, Stephan Werner, Carl Krürger, and Kurt Schaffner. "The photo-Nazarov cyclization of 1-cyclohexenyl phenyl ketone revisited. Observation of intermediates." Journal of Photochemistry and Photobiology A: Chemistry 57, no. 1-3 (1991): 127–51. http://dx.doi.org/10.1016/1010-6030(91)85011-5.

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23

Zhu, Benchuan, Guannan Qian, Yuli Xiao, Sheng Deng, Meng Wang, and Aiguo Hu. "A convergence of photo-bergman cyclization and intramolecular chain collapse towards polymeric nanoparticles." Journal of Polymer Science Part A: Polymer Chemistry 49, no. 24 (2011): 5330–38. http://dx.doi.org/10.1002/pola.25013.

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24

Arnold, Donald R., Dennis A. Connor, Kimberly A. McManus, Pradip K. Bakshi та T. Stanley Cameron. "The photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction. Part 11: Involving (R)-(+)-α-terpineol and (R)-(+)-limonene, substituting on 1,4-dicyanobenzene". Canadian Journal of Chemistry 74, № 4 (1996): 602–12. http://dx.doi.org/10.1139/v96-064.

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Irradiation of an acetonitrile–methanol (3:1) solution of 1,4-dicyanobenzene (1), biphenyl (5), and (R)-(+)-limonene (21) leads to formation of the 1:1:1 (methanol:21:1) photo-NOCAS adducts: 4-[(1R,2S,4R)-4-isopropenyl-2-methoxy-1-methylcyclohexyl]benzonitrile (23, 30%), 4-[(1S,2R,4R)-4-isopropenyl-2-methoxy-1-methylcyclohexyl]benzonitrile (24, 2%), 4-[(1R,2R,5R)-5-isopropenyl-2-methoxy-2-methylcyclohexyl]benzonitrile (25, 3%), and 4-[(1S,2S,5R)-5-isopropenyl-2-methoxy-2-methylcyclohexyl]benzonitrile (26, 1%). When an acetonitrile solution (no added methanol) of 1,4-dicyanobenzene (1), bipheny

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25

Böcker, Jana K., Wolfgang Dörner, and Henning D. Mootz. "Rational design of an improved photo-activatable intein for the production of head-to-tail cyclized peptides." Biological Chemistry 400, no. 3 (2019): 417–27. http://dx.doi.org/10.1515/hsz-2018-0367.

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Abstract Head-to-tail cyclization of genetically encoded peptides and proteins can be achieved with the split intein circular ligation of peptides and proteins (SICLOPPS) method by inserting the desired polypeptide between the C- and N-terminal fragments of a split intein. To prevent the intramolecular protein splicing reaction from spontaneously occurring upon folding of the intein domain, we have previously rendered this process light-dependent in a photo-controllable variant of the M86 intein, using genetically encoded ortho-nitrobenzyltyrosine at a structurally important position. Here, we

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26

Hasegawa, Eietsu, Kazuma Mori, Shiori Tsuji, Kazuki Nemoto, Taku Ohta, and Hajime Iwamoto. "Visible Light-Promoted Metal-Free Reduction of Organohalides by 2-Naphthyl or 2-Hydroxynaphthyl-Substituted 1,3-Dimethylbenzimidazolines." Australian Journal of Chemistry 68, no. 11 (2015): 1648. http://dx.doi.org/10.1071/ch15396.

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The visible light-promoted reduction reactions of some organohalides were investigated using 2-aryl-1,3-dimethylbenzimidazolines (Ar-DMBIH) possessing 2-naphthyl or 2-hydroxynaphthyl substituents. In these reduction reactions, single-electron transfer from photo-excited Ar-DMBIH, attained by Xe lamp irradiation through an appropriate glass-filter (λ > 390 nm), to the halide substrates leads to the carbon–halogen bond cleavage, followed by the rearrangements of the formed carbon radicals such as 5-exo hexenyl cyclization and the Dowd–Beckwith ring expansion. Addition of 1,8-diazabicyclo[5.4.

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27

Arnold, Donald R., and Kimberly A. McManus. "Photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction: methanol, beta-myrcene, and 1,4-dicyanobenzene. Intramolecular cyclization of an ene-diene radical cation." Canadian Journal of Chemistry 76, no. 9 (1998): 1238–48. http://dx.doi.org/10.1139/v98-156.

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The photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction of methanol, 7-methyl-3-methylene-1,6-octadiene ( β-myrcene, 1), and 1,4-dicyanobenzene yields five 1:1:1 adducts:cis-2-(4-cyanophenyl)-4-(1-methoxy-1-methylethyl)-1-methylenecyclohexane (15), trans-2-(4-cyanophenyl)-4-(1-methoxy-1-methylethyl)-1-methylenecyclohexane (16), 1-(4-cyanophenylmethyl)-4-(1-methoxy-1-methylethyl)cyclohexene (17), 4-[4-methoxy-3,3-dimethylcyclohex-(E)-1-ylidenyl]methylbenzonitrile (18), and 4-(1-vinyl-4-trans-methoxy-3,3-dimethylcyclohexyl)benzonitrile (19). All of these ad

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28

McManus, Kimberly A., and Donald R. Arnold. "The photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction. Part 10: intramolecular reactions involving alk-4-enols and 1,4-dicyanobenzene." Canadian Journal of Chemistry 73, no. 12 (1995): 2158–69. http://dx.doi.org/10.1139/v95-268.

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Our study of the photochemical nucleophile–olefin combination, aromatic substitution (photo-NOCAS) reaction has been extended to include alk-4-enols. Irradiation of acetonitrile solutions of the alk-4-enols, 6-methyl-5-hepten-2-ol (16) and 5-methyl-5-hexen-2-ol (17), and the aromatic, 1,4-dicyanobenzene (1), leads to cyclized 1:1 (alk-4-enol:aromatic) adducts. The addition of biphenyl (5) to the irradiation mixture, serving as a codonor, increases the yields and the efficiency of formation of the adducts. The structures assigned to the products trans-2-(isopropyl 4-cyanophenyl)-5-methyltetrahy

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29

Mattioli, Roberto, Daniel Di Risola, Rodolfo Federico, et al. "Effect of Natural Deep Eutectic Solvents on trans-Resveratrol Photo-Chemical Induced Isomerization and 2,4,6-Trihydroxyphenanthrene Electro-Cyclic Formation." Molecules 27, no. 7 (2022): 2348. http://dx.doi.org/10.3390/molecules27072348.

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trans-Resveratrol is a natural bioactive compound with well-recognized health promoting effects. When exposed to UV light, this compound can undergo a photochemically induced trans/cis isomerization and a 6π electrochemical cyclization with the subsequent formation of 2,4,6-trihydroxyphenanthrene (THP). THP is a potentially harmful compound which can exert genotoxic effects. In this work we improved the chromatographic separation and determination of the two resveratrol isomers and of THP by using a non-commercial pentafluorophenyl stationary phase. We assessed the effect of natural deep eutec

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30

Ren, Miaofeng, Xiaoyang Yan, Xiaojing Lai, Jin-Biao Liu, Hongwei Zhou, and Guanyinsheng Qiu. "Nitrenium ion-based ipso-addition and ortho-cyclization of arenes under photo and iron dual-catalysis." Molecular Catalysis 528 (August 2022): 112413. http://dx.doi.org/10.1016/j.mcat.2022.112413.

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31

In-Seop-Cho, Chao-Pin Lee, and Patrick S. Mariano. "Stereochemical aspects of photo-set induced diradical cyclization reactions as part of isoquinoline alkaloid synthetic strategies." Tetrahedron Letters 30, no. 7 (1989): 799–802. http://dx.doi.org/10.1016/s0040-4039(01)80617-1.

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32

Warzecha, K. D., X. Xing, and M. Demuth. "Cyclization of terpenoid polyalkenes via photo-induced electron transferversatile single-step syntheses of mono- and polycycles." Pure and Applied Chemistry 69, no. 1 (1997): 109–12. http://dx.doi.org/10.1351/pac199769010109.

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33

Moormann, Widukind, Daniel Langbehn, and Rainer Herges. "Synthesis of functionalized diazocines for application as building blocks in photo- and mechanoresponsive materials." Beilstein Journal of Organic Chemistry 15 (March 20, 2019): 727–32. http://dx.doi.org/10.3762/bjoc.15.68.

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Seven symmetrically 3,3’-substituted diazocines were synthesized. Functional groups include alcohol, azide, amine and vinyl groups, which are suitable for polymer synthesis. Upon irradiation at 385 and 530 nm the diazocines perform a reversible, pincer-type movement switching the 3,3’-distance between 6.1 Å (cis, stable isomer) and 8.2 Å (trans, metastable isomer). Key reactions in the synthesis are an oxidative C–C coupling of 2-nitrotoluenes (75–82% yield) and a reductive ring closure to form the diazocines (56–60% yield). The cyclization of the dinitro compound to the azo compound was impro

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34

Singh, Ravinder, Hsin-Yen Wu, Atul Kumar Dwivedi, et al. "Monomeric and aggregation emissions of tetraphenylethene in a photo-switchable polymer controlled by cyclization of diarylethene and solvent conditions." Journal of Materials Chemistry C 5, no. 38 (2017): 9952–62. http://dx.doi.org/10.1039/c7tc03071a.

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35

He, Shang Hua, Gang Liu, and Shi Qiang Cui. "Study on Photochromic Materials with a Novel Photochromic Diarylethene use for Polarization Holographic Recording." Advanced Materials Research 763 (September 2013): 61–64. http://dx.doi.org/10.4028/www.scientific.net/amr.763.61.

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A novel unsymmetrical photochromic diarylethene 1-(2, 5-dimethyl-3-thienyl)-2-[2-methyl-5-(2,2-dibutylfluorene)-3-thienyperfluorocyclo-pentene (1o) was synthesized and its photochromic and fluorescent properties were investigated. Diarylethene 1 changed the color from colorless to hyacinthine upon irradiation with 297 nm UV light, in which absorption maxima were observed at 554 nm in hexane and at 565 nm in PMMA amorphous film, respectively. This new photochromic system also exhibited remarkable fluorescence intensity both in solution and in PMMA film. The fluorescence spectra showed a systema

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36

Migliorini, M. G., P. Galvan, G. Sbrana, G. P. Donzelli, and C. Vecchi. "Bilirubin photoconversion induced by monochromatic laser radiation. Comparison between aerobic and anaerobic experiments in vitro." Biochemical Journal 256, no. 3 (1988): 841–46. http://dx.doi.org/10.1042/bj2560841.

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Structural and geometric photoisomerization of bilirubin bound to human serum albumin was investigated. Solutions were irradiated with monochromatic light emitted by an Ar ion laser, the 457.9, 488.0 and 514.5 nm wavelengths being selected. Photoproducts were separated and analysed by h.p.l.c. Visible-absorption spectra of pure ZZ-bilirubin, ZE-bilirubin and lumirubin in the eluent were registered in the 350-550 nm region by collecting single fractions by h.p.l.c. Wavelength-dependence of bilirubin photoconversion was studied within photoequilibrium and up to a large decrement of the total con

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37

Zou, Long, Lei Wang, Li Sun, Xiaofei Xie, and Pinhua Li. "Photo-driven haloazidation cyclization of 1,5-enynes having cyano groups with TMSN3 and NIS/NCS/NBS under metal-free conditions." Chemical Communications 56, no. 57 (2020): 7933–36. http://dx.doi.org/10.1039/d0cc02471f.

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A visible-light-driven three-component haloazidation cyclization of 1,5-enynes having cyano groups with TMSN<sub>3</sub> and N-iodo(bromo/chloro)succinimide (NIS/NCS/NBS) under metal-free conditions was developed.

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38

Grondin, Joseph, Christian Aupetit, Jean-Marc Vincent, and Thierry Tassaing. "Cyclic Carbonates through the Photo-Induced Carboxylative Cyclization of Allylic Alcohol with CO2: A Comprehensive Kinetic Study of the Reaction Mechanism by In Situ ATR-IR Spectroscopy." Catalysts 13, no. 6 (2023): 939. http://dx.doi.org/10.3390/catal13060939.

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A one-pot multicomponent green process is investigated for the synthesis of perfluoroalkylated cyclic carbonate which merges the photo-promoted Atom Transfer Radical Addition (ATRA) of a perfluoroalkyl iodide (Rf-I) onto allyl alcohols with the Lewis-base-promoted carboxylative cyclization. The evolution of the complex mixture during the reaction was monitored by in situ ATR-IR and Raman spectroscopies that provided insights into the reaction mechanism. The effect on the kinetics and the carbonate yields of key parameters such as the stoichiometry of reagents, the nature of the Lewis base and

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39

Huang, Michael H. "(Invited) Semiconductor Facet Effects Toward Photocatalysis." ECS Meeting Abstracts MA2024-01, no. 13 (2024): 1078. http://dx.doi.org/10.1149/ma2024-01131078mtgabs.

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Photo-induced charge transfer has been found to strongly depend on the exposed semiconductor surfaces. For instance, {110}-bound Cu2O rhombic dodecahedra exhibit a high photocatalytic activity toward dye degradation, but {100}-terminated Cu2O cubes are inert. Photocatalytic behaviors of Cu2O-based semiconductor heterostructures, such as Cu2O-ZnS and Cu2O-ZnO composites, can both enhance and suppress photocatalytic activity depending on the contacting planes at the heterojunction. Significantly, Cu2O photocatalytic activity can be greatly enhanced by functionalizing with conjugated molecules su

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40

Sun, Bin, Hao Ding, Hai‐Xia Tian, et al. "Photo‐Triggered Self‐Induced Homolytic Dechlorinative Sulfonylation/Cyclization of Unactivated Alkenes: Synthesis of Quinazolinones Containing a Sulfonyl Group." Advanced Synthesis & Catalysis 364, no. 4 (2021): 766–72. http://dx.doi.org/10.1002/adsc.202101141.

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41

Campos, Pedro J., Míriam Caro, and Miguel A. Rodríguez. "Role of the electron-donating methoxy group on the photo-induced cyclization of 2-azadienes: a mechanistic study." Tetrahedron 69, no. 37 (2013): 7950–55. http://dx.doi.org/10.1016/j.tet.2013.07.015.

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42

Keshari, Twinkle, Vishnu P. Srivastava, and Lal Dhar S. Yadav. "Visible-light-initiated photo-oxidative cyclization of phenolic amidines using CBr4 – A metal free approach to 2-aminobenzoxazoles." RSC Advances 4, no. 11 (2014): 5815. http://dx.doi.org/10.1039/c3ra46314a.

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Leitich, Johannes, Ingeborg Heise, Jürgen Rust, and Kurt Schaffner. "The Photo-Nazarov Cyclization of 1-Cyclohexenyl(phenyl)methanone Revisited − Trapping of the 2-Oxyallyl Intermediates by Olefins." European Journal of Organic Chemistry 2001, no. 14 (2001): 2719–26. http://dx.doi.org/10.1002/1099-0690(200107)2001:14<2719::aid-ejoc2719>3.0.co;2-z.

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Nagasaka, Tatsuhiro, Hikaru Sotome, Soichiro Morikawa та ін. "Restriction of the conrotatory motion in photo-induced 6π electrocyclic reaction: formation of the excited state of the closed-ring isomer in the cyclization". RSC Advances 10, № 34 (2020): 20038–45. http://dx.doi.org/10.1039/d0ra03523h.

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Yang, Chen, Faisal Mehmood, Tsz Lung Lam, et al. "Stable luminescent iridium(iii) complexes with bis(N-heterocyclic carbene) ligands: photo-stability, excited state properties, visible-light-driven radical cyclization and CO2 reduction, and cellular imaging." Chemical Science 7, no. 5 (2016): 3123–36. http://dx.doi.org/10.1039/c5sc04458h.

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Polukhtine, Andrei, Grigori Karpov, Dinesh R. Pandithavidana, Alexander Kuzmin, and Vladimir V. Popik. "Photochemical Triggering of the Bergman and Myers - Saito Cyclizations." Australian Journal of Chemistry 63, no. 7 (2010): 1099. http://dx.doi.org/10.1071/ch10185.

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Two strategies for the photochemical generation of reactive enediyne compounds and their subsequent cycloaromatization to p-benzyne or α,3-didehydrotoluene derivatives are discussed in this account. The first method employs a photo-Wolff reaction of stable 11- or 12-membered ring precursor enediynes containing the 2-diazo-1,3-diketone moiety. Irradiation of these compounds results in ring contraction and the formation of two isomeric enediynes possessing an enolized β-ketoester fragment. One of the isomers undergoes the conventional Bergman cyclization, whereas the other isomerizes into the en

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Keshari, Twinkle, Vishnu P. Srivastava, and Lal Dhar S. Yadav. "ChemInform Abstract: Visible-Light-Initiated Photo-Oxidative Cyclization of Phenolic Amidines Using CBr4- A Metal Free Approach to 2-Aminobenzoxazoles." ChemInform 45, no. 40 (2014): no. http://dx.doi.org/10.1002/chin.201440144.

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Wonanke, A. D. Dinga, and Deborah L. Crittenden. "Beyond the Woodward-Hoffman Rules: What Controls Reactivity in Eliminative Aromatic Ring-Forming Reactions?" Australian Journal of Chemistry 71, no. 4 (2018): 249. http://dx.doi.org/10.1071/ch17564.

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The Mallory (photocyclization) and Scholl (thermal cyclohydrogenation) reactions are widely used in the synthesis of extended conjugated π systems of high scientific interest and technological importance, including molecular wires, semiconducting polymers, and nanographenes. While simple electrocyclization reactions obey the Woodward-Hoffman rules, no such simple, general, and powerful model is available for eliminative cyclization reactions due to their increased mechanistic complexity. In this work, detailed mechanistic investigations of prototypical reactions reveal that there is no single

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Рязанцева, Тетяна. "MEMORY AND TIME IN OLES ILCHENKO’S PHOTOPOETRY." Слово і Час, no. 3 (June 30, 2024): 19–35. http://dx.doi.org/10.33608/0236-1477.2024.03.19-35.

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The paper considers new creative approaches to the established types of poetry. Building on the theoretical definitions, taxonomies and observations formulated in the works of Aleida Assmann, Roland Barthes, Nina Chamata, Robert Crawford and Norman McBeath, Michael Nott, Irina Rajewski, James Smith, Susan Sontag, et al., the research argues that the artistic practices of photopoetry (“a form of photo-text that takes, for its primary components, poetry and photography”, Michael Nott) offer new ways to interpret certain topics of metaphysical poetry. The material for analysis is taken from a bla

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Zhang, Yunxiao, Jiaxin Wang, Youyuan Guo, Shanshan Liu, and Xiao Shen. "Carbonyl Olefin Metathesis and Dehydrogenative Cyclization of Aromatic Ketones and gem‐Difluoroalkenes." Angewandte Chemie, December 8, 2023. http://dx.doi.org/10.1002/ange.202315269.

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The beauty of one‐pot cascade reaction lies in the efficient disconnection and construction of several bonds in a single reaction flask, without the isolation of any intermediates. Herein, we report the first photo‐induced thermal‐promoted cascade reactions of readily available aromatic ketones and aromatic gem‐difluoroalkenes for the synthesis of phenanthrenes which possess potential utility in drug design and material science. The reaction combines carbonyl‐olefin metathesis (cascade photo‐induced [2+2] cyclization and thermal‐controlled retro [2+2] cyclization) and dehydrogenative cyclizati

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