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Дисертації з теми "Diaryliodonium salt"

Автор: Grafiati

Опубліковано: 30 листопада 2024

Оновлено: 31 липня 2025

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1

Corakci, Bengisu. "Substituted Quinoxaline And Benzimidazole Containing Monomers As Long Wavelength Photosensitizers For Diaryliodonium Salt Initiators In Photopolymerization." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615458/index.pdf.

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Анотація:

In this study<br>ferrocenyl and naphthalenyl substituted quinoxaline derivatives<br>5,8- bis (2,3- dihydrothieno [3,4-b] [1,4] dioxin-5-yl)-2- (naphthalen-2-yl)- 3- ferrocenyl- 4a,8a-dihydroquinoxaline<br>5,8- bis (2,3-dihydrothieno [3,4-b] [1,4]dioxin-5-yl) -2- (phenyl) -3-ferrocenylquinoxaline<br>5,8-bis (2,3-dihydrothieno [3,4-b] [1,4]dioxin-5-yl) -2,3- di(naphthalen-2-yl)quinoxaline and trihexylthiophene and thiophene coupled benzimidazole derivatives<br>4-(tert-butyl)-4,7-bis(4-hexylthiophen-2-yl)spiro[benzo[d]imidazole-2,1-cyclohexane] and 4-(tert-butyl)-4, 7-bis(thiophenyl)spiro[benzo[d

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2

Peacock, Martin James. "The electrosynthesis of diaryliodonium salts." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326302.

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3

Marchal, Lucas. "Synthèse de nouveaux candidats médicamenteux présentant une chiralité axiale C-N par le développement de nouveaux couplages C-N atroposélectifs." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAF029.

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Анотація:

Les composés à chiralité axiale C–N ont démontré un potentiel significatif dans divers domaines, en particulier dans l'industrie pharmaceutique. Cependant, il existe actuellement peu de méthodologies connues permettant d’accéder à ces composés, et elles sont généralement limitées à des structures moléculaires très spécifiques. Afin de préparer de nouveaux atropisomères C–N d'intérêt, des méthodologies synthétiques innovantes doivent être développées. À cette fin, nous avons concentré nos efforts sur l'utilisation de sels de diaryliodonium comme partenaires de couplage hautement réactifs, ce qu

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4

Bielawski, Marcin. "Efficient and High-Yielding Routes to Diaryliodonium Salts." Licentiate thesis, Stockholm : Department of Organic Chemistry, Stockholm University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7969.

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5

Lindstedt, Erik. "Metal-Free O- and C-Arylation with Diaryliodonium Salts." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-140944.

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This thesis concerns the development of metal-free applications using diaryliodonium salts. The first project describes an arylation protocol of allylic and benzylic alcohols in aqueous media. The method proceeds under mild conditions and the ether products were obtained in moderate to good yields. The methodology was also expanded to include arylation of phenols, giving diaryl ethers in good to excellent yields. In the second project, an arylation method that included a wider range of aliphatic alcohols was developed. The scope of accessible alkyl aryl ethers was studied and included a compar

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6

Seidl, Thomas Ludwig. "The Preparation of Diaryliodonium Salts for Application in Arylation Chemistry." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4238.

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Анотація:

Diaryliodonium salts offer potential as novel reagents for arylation chemistry. An overall goal and successful outcome of this work has been to further understanding of diaryliodonium salt chemistry by developing practical methods that enable chemists more convenient access to these reagents, for the purpose of reaction development. To this end a robust and convenient preparation method has been developed and resulted in novel commercially available diaryliodonium salts. The remainder of the work described, has focused on understanding the parameters important to diaryliodonium mediated arylat

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7

Malmgren, Joel. "Iodonium Salts : Preparation, Chemoselectivity and Metal-Catalyzed Applications." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-107694.

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This thesis concerns the preparation and use of diaryliodonium salts. In Project I various unsymmetrical diaryliodonium salts were reacted with three different nucleophiles in order to study the chemoselectivity of the reactions of the salts. The main focus of this project was to gain a deeper understanding of the underlying factors that affect the chemoselectivity in transition metal-free arylation reactions. They were found to be very nucleophile-dependent. Some nucleophiles were very sensitive to electronic effects, whereas others were sensitive to steric factors. Ultimately, some arenes ar

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8

Kolay, Merve. "Dibenzophenazine And Quinoxaline Derivatives As Novel Visible Photosensitizers For Diaryliodonium Salts." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613419/index.pdf.

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This study is focused on the use of visible light in photoinitiated cationic polymerization. Photoinitiated polymerization of oxiranes, vinyl ethers, and other vinyl monomers was achieved. In doing so, (2-(2,3 dihydrobenzo [b][1,4]dioxin-6-yl)-3-(2,3-dihydrobenzo[b]-[1,4]dioxin-7-yl)-5-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-8-(2,3-dihydrothieno[3,4-b][1,4]dioxin-7yl) quinoxaline) (DBQEd) and poly(2,3,5,8-tetra(thiophen-2-yl)quinoxaline) (TTQ), two dibenzo[a,c]phenazine derivatives<br>10,13-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)dibenzo[a,c] phenazine (PHED) and 10,13-bis(4-hexylthiop

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9

Bielawski, Marcin. "Diaryliodonium Salts : Development of Synthetic Methodologies and α-Arylation of Enolates". Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-54738.

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Анотація:

This thesis describes novel reaction protocols for the synthesis of diaryliodonium salts and also provides an insight to the mechanism of α-arylation of carbonyl compounds with diaryliodonium salts. The first chapter gives a general introduction to the field of hypervalent iodine chemistry, mainly focusing on recent developments and applications of diaryliodonium salts. Chapter two describes the synthesis of electron-rich to electron-poor diaryliodonium triflates, in moderate to excellent yields from a range of arenes and iodoarenes. In chapter three, it is described that molecular iodine can

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10

Sundalam, Sunil Kumar. "The Discovery and Development of Metal-Free Arylation Reactions with Unsymmetrical Diaryliodonium Salts." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3764.

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Анотація:

Functionalizing arenes and heteroarenes has been an active area of research since the 19th century, due to the presence of these molecular structures in many industrially important sectors. A tremendous amount of research has been published in achieving these chemical transformations using stoichiometric reagents and transition metal-catalyzed reactions. However, challenges still remain. An alternative and comparable methodology to metal-catalyzed reactions to overcome the drawbacks will advance this particular area of research is desirable. Hypervalent iodine compounds offer a promising appro

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11

Jayatissa, Kuruppu Lilanthi. "A Metal-Free Approach to Biaryl Compounds: Carbon-Carbon Bond Formation from Diaryliodonium Salts and Aryl Triolborates." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2229.

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Biaryl moieties are important structural motifs in many industries, including pharmaceutical, agrochemical, energy and technology. The development of novel and efficient methods to synthesize these carbon-carbon bonds is at the forefront of synthetic methodology. Since Ullmann’s first report of stoichiometric Cu-mediated homo-coupling of aryl halides, there has been a dramatic evolution in transition metal catalyzed biaryl cross-coupling reactions. Our work focuses on the discovery and development of an unprecedented reagent combination for metal-free cross-coupling. It is hypothesized that di

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12

Racicot, Léanne. "Extending the boundaries of diaryliodonium reagents : expressing I-nucleophilicity of aryl iodides and metal-free preparation of sulfonium salts." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59346.

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Анотація:

Diaryliodonium salts are a well-established class of hypervalent iodine reagents and act as aryl group transfer agents towards nucleophiles. This work established the possibility of metathesis between diaryliodonium triflates and various iodoarenes. In an effort to further understand the factors that govern this process, λ³-iodanes containing 2-thienyl moieties were prepared. As a result, aryl iodides unable to undergo metatesis previously were found to be suitable nucleophiles as the metathesis favors diaryliodonium species where more nucleofugal aryl iodides, such as 2-iodothiophene, are exp

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13

Bhatt, Satwinder Singh. "Diaryliodonium salts as precursors to electron-rich [¹⁸F]fluoroarenes for use in the medical imaging technique, Positron Emission Tomography." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3262.

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14

Stridfeldt, Elin. "Hypervalent Iodine Reagents in Metal-Free Arylations and Vinylations : Investigation of Suitable Coupling Partners and Synthesis of New Reagents." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-141580.

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Анотація:

This thesis concerns the development of metal-free reactions to obtain carbon-heteroatom and carbon-carbon bonds. This is achieved by transferring carbon ligands from hypervalent iodine reagents to suitable nucleophiles. The bulk of the work presented herein concerns arylation of oxygen and nitrogen nucleophiles, using the well-known diaryliodonium salts as aryl sources. In the first project, O-arylation of the oxime ethyl acetohydroxamate was studied. It was found that electron-poor as well as electron-rich aryl moieties could be transferred successfully to this nucleophile. Furthermore, the

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15

Yilmaz, Seda. "Long Wavelength Photosensitizers With Benzotriazole And Benzimidazole Skeletons For Cationic Polymerization." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613457/index.pdf.

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Анотація:

Benzimidazole and benzotriazole derivatives, 4-(2,3-Dihydrothieno[3,4-b][1,4] dioxin-5-yl)-7-(2,3-dihydrothieno[3,4b][1,4]dioxin-7-yl)-2-benzyl-1H-benzo[d] imidazole (BIm-Ed), 2-benzyl-4,7-di(thiophen-2-yl)-2H-benzo[d] [1,2,3] triazole (BBTS), and 2-benzyl-4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2Hbenzo[ d] [1,2,3] triazole (BBTES) were employed as photosensitizers for diaryliodonium salt photoinitiators in cationic photopolymerization of various epoxide and vinyl ether monomers. Diphenyliodonium hexafluorophosphate (Ph2I+PF6&macr<br>) salt was used as the photoinitiator in this stud

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16

Jalalian, Nazli. "Development and Applications of Hypervalent Iodine Compounds : Powerful Arylation and Oxidation Reagents." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-75810.

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Анотація:

The first part of this thesis describes the efficient synthesis of several hypervalent iodine(III) compounds. Electron-rich diaryliodonium salts have been synthesized in a one-pot procedure, employing mCPBA as the oxidant. Both symmetric and unsymmetric diaryliodonium tosylates can be isolated in high yields. An in situ anion exchange also enables the synthesis of previously unobtainable diaryliodonium triflates. A large-scale protocol for the synthesis of a derivative of Koser’s reagent, that is an isolable intermediate in the diaryliodonium tosylate synthesis, is furthermore described. The l

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