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Dissertations / Theses on the topic 'Sulfonyl radicals'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kofie, William. "Radical and palladium mediated cyclisations for the synthesis of heterocyclic ring systems." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271754.

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2

Rouquet, Guy. "Nouvelles méthodes de génération de radicaux silylés : application à des processus radicalaires sans étain." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14180/document.

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Deux nouveaux concepts, visant à reproduire la chimie radicalaire des diétains à l’aide de radicaux centrés sur le silicium, sont présentés à travers ce manuscrit. Le premier concept introduit les “silaboranes”, des molécules constituées d’un motif de type silane et d’un atome de bore. Ceux-ci ont pour la première fois été exploités comme générateurs de radicaux triméthylsilyle via l’utilisation de la réaction de SHi sur le silicium (Substitution Homolytique Intramoléculaire) à partir de disilanes. Des études cinétiques et de modélisation moléculaires de la réaction de SHi ont, entre autres, p

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3

Pirenne, Vincent. "New radical additions of alkylsulfonyl cyanides onto unactivated olefins : enantioselective approaches towards the total synthesis of leucophyllidine." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0438/document.

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Dans le cadre de la synthèse totale de la leucophyllidine, un alcaloïde bis-indolique, des réactions de carbo- et sulfonyl-cyanation radicalaires sans étain ont été développées. Les cyanures de sulfonyle RSO2CN, préparés à partir des thiocyanates correspondant par une nouvelle méthode d’oxydation, sont utilisés comme pièges radicalaires. Ces réactifs fragmentent en présence d’initiateur thermique (carbo-cyanation) ou par le biais de la catalyse photoredox (sulfonyl-cyanation). Dans ce dernier cas, une étude mécanistique approfondie sur le cycle photo-catalytique a été accomplie. Ces méthodolog

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4

Gastaldi, Stéphane. "Les radicaux sulfonyle en synthèse organique : application à la synthèse de l'acide kai͏̈nique." Aix-Marseille 3, 1997. http://www.theses.fr/1997AIX30091.

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L'acide kainique est une pyrrolidine trisubstituee en position 2, 3 et 4, la stereochimie des substituants est trans au niveau des carbones 2 et 3, et cis au niveau des carbones 3 et 4. L'addition radicalaire de tsseph sur des 4-aza-1,6-dienes correctement fonctionnalises est une voie d'acces au squelette carbone de l'acide -kainique. Toutefois, l'elimination, via un selenoxyde, du groupe phenylselanyle n'est pas regioselective et ne permet pas l'acces au motif isopropenyle de l'acide kainique avec des rendements satisfaisants. Le rearrangement radicalaire des sulfones allyliques a permis en u

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5

Grilly, Joshua David. "Switchable Solvents for Novel Chemical Processing." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7461.

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This work seeks to develop new solvents for environmentally benign chemical synthesis. Switchable solvents are a new class of compounds that change properties upon the application of some stimulus such as heat, UV light, or pH. We have developed the use of a new solvent, thiirane oxide, that has chemical properties similar to DMSO. Thiirane oxide, however, undergoes facile decomposition to two gases at temperatures above 100 C, which is much lower than the temperature required for removing DMSO. Thus we have a solvent with excellent solvation properties, but with a built-in switch for easi

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6

Lee, Wan-Hua, and 黎萬華. "The Reactions of Allylsulfones with Sulfonyl Radicals." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/91718597201339481889.

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7

Ming-YiTsai and 蔡明義. "The cyclization reaction of sulfonamides with sulfonyl radicals." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/00320299828871992221.

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碩士<br>國立成功大學<br>化學系碩博士班<br>100<br>In recent decades, there has been a growing interest in the application of radical cyclization in organic synthesis. These reactions involving in the free radicals have been widely used in synthesis of various cyclic compounds. These reactions exhibit in regio- and stereo-selectivity bring about a lot of interest of chemists. Alkylsulfonyl radical can undergo addition reaction with unsaturated bond; or elimination reaction of intermediate, or both of them. Thus, alkylsulfonyl radical is a multi-function radical. In this thesis, we use a catalytic amount of si

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8

Luo, Ji-Yu, and 駱集煜. "The cyclization reaction of sulfonamides with sulfonyl radicals." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/46481997294141185607.

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碩士<br>國立成功大學<br>化學系碩博士班<br>94<br>Initiated cyclization by free radical plays an important role in organic synthesis. Sulfonyl radical have been reported can undergo addition reaction with unsaturated bond or be an intermediate undergo elimination reaction. Thus, sulfonyl radical is a multi-functionalized intermediate. Manganese(Ⅲ) acetate has been used for the majority of oxidative cyclizations, sulfonyl radicals which produced from manganese(Ⅲ) acetate induced free radical cyclization reaction with sulfonamides in our report. In this thesis we described our results on： Sulfonyl radical whic

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9

Lee, Jia-Han, and 李佳翰. "The Reactions of N-Allyl-N-benzylsulfonamides with Sulfonyl Radicals." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/26885891444399054821.

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10

Ke, Bor-Wen, та 柯博文. "I. The Study Of Intramolecular Cyclization Of α-Sulfinyl And α -Sulfonyl Radicals II、The Application In The Synthesis Of (±)－Supinidine". Thesis, 1993. http://ndltd.ncl.edu.tw/handle/69642497269149131107.

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11

Huang, Chih-Hao, and 黃致豪. "The Study of Radical Cyclizations of alpha-Sulfonyl Acylsilane." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/11156690300396540634.

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碩士<br>國立臺灣大學<br>化學系<br>86<br>In this research, we studied about how to apply the 1-(alpha-silyloxy)-cycloalkyl radical intermediate that was obtained from the radical cyclization of acylsilane. In our idea, if there is a good leaving group on the beta-position of the intermediate, then it would be set up to perform facile beta-scission and finally give a useful silyl enol ether in a regiospecific manner. In six-membered ring system, we used sulfonyl group as alpha-sub

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12

Wang, Nung Sen, and 王農森. "The Study of Radical Cyclization of a-Sulfonyl Acylsilanes." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/15178467636957370671.

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13

Yuan-HanLi and 黎瀚元. "Synthesis of Indol-2-one Derivatives via Free Radical Reaction By Sulfonyl Radical." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/55649393842194571112.

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碩士<br>國立成功大學<br>化學系<br>103<br>SUMMARY Use of radical cyclization to the unsaturated bonds is considered to be a very useful way for the synthesis of heterocyclic compounds. Alkylsulfonyl radical can undergo addition reaction with unsaturated bound or elimination reaction of intermediate. In this thesis, we use a catalytic amount of silver (I) with potassium persulfate to oxidizing p-toluenesulfinate sodium salt and oxidizing p-toluenesulfinate sodium salt by potassium persulfate in heating condition are taken as sulfonyl radical source, and then induced free radical cyclization reaction with s

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14

Hsu, Huan-Che, and 許桓. "The Study of Vinyl Radical Cyclization of a—Sulfonyl Acylsilanes." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/16643880953948234712.

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15

CHEN, GONG-MIN, and 陳恭民. "The studies of free radical cyclization reactions mediated by sulfonyl chloride." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/49566515714725043731.

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16

CAI, JI-DA, and 蔡技達. "The studies of free radical cyclization reactions mediated by sulfonyl chlorides." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/49456959393837111839.

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17

Chen, Ming-Jen, та 陳明仁. "The Study of Intramolecular Free Radical Cyclizations of α-Silyl Aldehydes and α-Sulfonyl Aldehydes". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/53804216276793441985.

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18

Wu, Kun-Liang, and 吳坤亮. "The Study of Sulfonyl Free Radical Cyclizations in the Syntheses of Pyrrolizidine Alkaloids Uspallatinecine and (+)-Crotanecine." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/77230709314861643236.

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19

Yi-JieHuang and 黃奕傑. "The Applications of Sulfonyl Radical on The Synthesis of 2-Quinolinones from N-aryl Amides and Quinolines from N-aryl Enamines." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/42836009015597216859.

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碩士<br>國立成功大學<br>化學系<br>104<br>Recently, there has been a growing interest in the application of free radical cyclization reactions to the formation of ring systems. Free radical reactions mediated by sulfonyl radicals have been noted by several groups. Free radical of sulfonyl radical can undergo addition reaction with unsaturated bond generate radical intermediate to undergo either 6-membered or 5-membered ring cyclization onto the aromatic ring effectively and provide synthetically useful methods for the syntheses of 2-quinolinones and quinolines. This thesis is divided into two parts：(1) Th

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20

Chernykh, Yana. "Sirné reagenty pro nukleofilní a radikálové zavedení tetrafluorethylových a tetrafluorethylénových skupin." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-338433.

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Charles University in Prague, Faculty of Science Department of Organic Chemistry Ing. Yana Chernykh Sulfur-Based Reagents for Nucleophilic and Radical Introduction of Tetrafluoroethyl and Tetrafluoroethylene Groups Ph.D. Thesis Prague 2014 ABSTRACT This project was aimed at developing new methodologies for selective introduction of tetrafluoroethyl and tetrafluoroethylene groups into organic molecules. The study was focused on reactivities of fluorinated sulfones and sulfides as tetrafluoroalkylation reagents. In the Introduction part of the thesis, main aspects of organofluorine chemistry are

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