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Dissertations / Theses on the topic 'Azaborane'

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Published: 4 June 2021

Last updated: 6 February 2022

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1

Campbell, Patrick, and Patrick Campbell. "Hydrogen Storage Applications of 1,2-Azaborines." Thesis, University of Oregon, 2012. http://hdl.handle.net/1794/12555.

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The development of safe and efficient hydrogen storage materials will aid in the transition away from fossil fuels toward a renewable, hydrogen-based energy infrastructure. Boron-nitrogen (BN) containing materials have attracted much attention due to their high hydrogen storage capacity and fast kinetics of hydrogen release. Furthermore, computational studies predict that hydrogen storage materials based on the BN-heterocycle 1,2-azaborine may enable reversible H2 uptake and release, with little additional energy input. This thesis develops the basic science needed for a hydrogen storage platf

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2

Baggett, Andrew William. "New Strategies Enabling Diverse Functionalization of Aromatic 1,2-Azaborine Motifs." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:105027.

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Thesis advisor: Shih-Yuan Liu<br>Described herein are four projects focused on the elaboration of aromatic 1,2-azaborine core structures through late-stage functionalization strategies. In the first chapter, the gram scale, protecting group-free synthesis of the direct BN isostere of benzene is developed. This protocol is used to produce large quantities of pure 1,2-azaborine suitable for use in fundamental investigations. Second, the first general solution for the functionalization of the C4, C5, and C6 ring positions of 1,2-azaborines is described, featuring iridium catalyzed C-H borylation

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3

Marwitz, Adam John Von 1981. "The chemistry of 1,2-dihydro-1,2-azaborine and nitrated lipids." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11299.

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xxv, 468 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>1,2-Dihydro-1,2-azaborine is a six-membered aromatic heterocycle that is related to the quintessential aromatic molecule, benzene, via the replacement of a CC fragment in benzene with an isoelectronic BN bond-pair. Like the benzene motif, 1,2-dihydro-1,2-azaborine derivatives could provide opportunities in fields ranging from medicine to materials. Recent breakthroughs in the synthesis of 1,2-dihydro-1,2-azaborine have led to a burge

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4

Lamm, Ashley, and Ashley Lamm. "Fundamental Chemistry of 1,2-Dihydro-1,2-Azaborines." Thesis, University of Oregon, 2012. http://hdl.handle.net/1794/12514.

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Benzene and its derivatives are ubiquitous in chemical research, with applications ranging from material science to biomedical research. 1,2-Dihydro-1,2-azaborine is a benzene mimic which replaces a CC bond with a BN bond. The basic science and applications of 1,2-azaborines is relatively underdeveloped. This thesis expands the fundamental understanding of 1,2-azaborines. Chapter I describes the air and moisture stability of 1,2-azaborines. Chapter II introduces nucleophilic aromatic substitution reactions that the parent 1,2-dihydro-1,2-azaborine will undergo. Chapter III discusses a tri

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5

Brown, Alec Nathaniel. "Late-Stage Functionalization of 1,2-Dihydro-1,2-Azaborines." Thesis, Boston College, 2015. http://hdl.handle.net/2345/bc-ir:104564.

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Thesis advisor: Shih-Yuan Liu<br>Described herein are two distinct research projects focused on the development of metal-catalyzed late-stage functionalization strategies for 1,2-dihydro-1,2-azaborines separated into three chapters. The first chapter discusses the development, synthesis, and recent contributions to the field of azaborine chemistry. The second chapter details the development of rhodium catalyzed B-H bond activation for the synthesis of a new class of BN-stilbenes as well as the discovery of a novel B-H to B-Cl transformation that is successful both with B-H azaborines as well a

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6

Bentley, Sierra Kathleen. "Selective Direct Borylation and Late-Stage Functionalization of 1,2-Azaborines:." Thesis, Boston College, 2020. http://hdl.handle.net/2345/bc-ir:109014.

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Thesis advisor: Shih-Yuan Liu<br>Described herein is the development of a method to directly borylate the C5-position of monocyclic 1,2-azaborines without the use of a metal catalyst, kinetic resolution or directing group. This method tolerates different substitution on the boron as well as at the C3-position of the azaborine. A new BN-isostere of the drug molecule, felbinac, was synthesized to demonstrate the application of this method<br>Thesis (MS) — Boston College, 2020<br>Submitted to: Boston College. Graduate School of Arts and Sciences<br>Discipline: Chemistry

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7

Armand, Jeremy Richard. "Late Stage Functionalization of 1,2-Azaborines for Application in Biomedical Research:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108646.

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Thesis advisor: Shih-Yuan . Liu<br>Chapter 1. Use of boron as a pharmacophore is as growing but still underdeveloped strategy for expanding chemical space in biomedical research. In addition to more established methods of incorporating boron in drug development, an attractive and emerging method of introducing boron into biologically active compounds is through boron-nitrogen containing heterocycles. In particular, the Liu group has focused on exploring the interactions of monocyclic 1,2-azaborines in biological space. In order to install complicated chemical functionality needed for further s

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8

Zhang, Yuanzhe. "Pd/azaborine-biaryl phosphine complexes: reaction development, mechanistic analysis, and investigations into metal-ligand coordination dynamics." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109152.

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Thesis advisor: Shih-Yuan Liu<br>Described herein are three research projects that focused on 1) the catalytic activities of Pd/azaborine-derived biary phosphine (Senphos) complexes in 1,3-enyne difunctionalization reactions and 2) the coordination behaviors of these Pd/Senphos complexes. In the first chapter, expansion of the substrate scope and mechanistic studies of the reported Pd/Senphos catalyzed site-, regio- and trans-selective hydroboration of 1,3- enynes are described. In the second chapter, the first intermolecular site-, regio- and transselective chloroboration and cyanoboration of

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9

Deegan, Jonathan E. "Aryl and Alkyl Migration Strategies for the Functionalization and Application of 1,2-Azaborines:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108582.

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Thesis advisor: Shih-Yuan Liu<br>As BN-CC isosterism becomes an increasingly valuable strategy to expand chemical space and increase molecular diversity, methods for functionalizing and utilizing BN-heteroarenes remain limited in comparison to those for all-carbon arenes. Described herein are initial studies aimed at developing methods for the late-stage functionalization of substituted 1,2-azaborines through controlled aryl and alkyl migrations. Furthermore, investigations into the application of B-aryl and B-alkyl 1,2-azaborines as transmetalation reagents in Suzuki-Miyaura cross-coupling re

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10

Thiedemann, Birk [Verfasser], Anne [Akademischer Betreuer] Staubitz, and Ulrich [Gutachter] Lüning. "Syntheses of Azaborine Polymers and Optimisation of Precursor Syntheses / Birk Thiedemann ; Gutachter: Ulrich Lüning ; Betreuer: Anne Staubitz." Kiel : Universitätsbibliothek Kiel, 2017. http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-202962.

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11

McConnell, Cameron Reed. "Leveraging 1,2-Azaborine's Distinct Electronic Structure to Access New Building Blocks:." Thesis, Boston College, 2019. http://hdl.handle.net/2345/bc-ir:108607.

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Thesis advisor: Shih-Yuan Liu<br>Described herein are three projects that derive from in-depth studies of the distinct electronic structure of monocyclic 1,2-dihydro-1,2-azaborine (heretofore referred to as simply 1,2-azaborine). In the first chapter, the first comprehensive review of the late-stage functionalization methods available for 1,2-azaborines as well as their bicyclic and polycyclic (BN-PAH) counterparts is presented. In the second chapter, the development of a general method for both C4 and C5 functionalization based on the building block approach is described. The distinct electro

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12

Motika, Stephen. "Diversifying Homogenous Au(I)-Catalysis through New Reaction Discovery." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6911.

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Homogenous Au(I)-catalysis has become a valuable synthetic tool to activate a host of unsaturated carbon functional groups towards nucleophilic addition. Over the course of the past two decades, many have embarked on new journeys within this field. Notably, the advancements in this field hinge on the development of new ligand systems that impart novel reactivity at the metal. Our group has focused on this area, as we have successfully demonstrated the utility of 1,2,3-triazoles as ligands for gold and a host of other transition metals and Lewis acids. With respect to gold catalysis, these

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13

Lee, Hyelee. "Site-Selective Reactions Via Scaffolding Catalysis & Synthesis and Binding Study of 1,2-Azaborines." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:107562.

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Thesis advisor: Kian L. Tan<br>Thesis advisor: Shih-Yuan Liu<br>Chapter 1. In the Tan laboratory, we developed synthetic methods to control reaction selectivity (regio-, stereo-, and site-selectivity) using scaffolding catalysis. Our strategy utilizes directing groups that induce intramolecularity through the formation of a labile covalent bond between the substrate and a binding site in a catalytic system. In the first part, we described site-selective functionalization of various carbohydrates and complex polyhydroxylated molecules which contain cis-1,2-diol motif using a chiral organic scaf

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14

Aleotti, Flavia. "A 2-pyridyl-2,1-borazaronaphthalene derivative as forefather of a new class of bidentate ligands: synthesis and application in luminescent Ir(III) complexes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13877/.

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Borazaro compounds (or azaborines) are aromatic compounds in which a C=C unit is replaced by an isoelectronic B-N unit. The possibility to generate chemical diversity has led to an increasing interest in azaborines, especially in the fields of biomedical research and optoelectonics. In particular, Dewar’s synthesis of borazaronaphthalene is a common starting step to obtain different 1,2-azaborines via nucleophilic substitution on the boron atom. Here we present the synthesis of a novel 1,2-azaborine (i.e. 4-methyl-2-(pyridin-2-yl)-2,1-borazaronaphthalene, named FAAH) via functionalization of 2

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15

Boknevitz, Katherine Lynn Michelle. "Synthesis and Characterization of BN-tryptophan and its Incorporation into Proteins & the Cation-π Binding Ability of BN-indole:". Thesis, Boston College, 2020. http://hdl.handle.net/2345/bc-ir:108710.

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Thesis advisor: Shih-Yuan Liu<br>Described herein are two projects on the application and effects of BN/CC isosterism on indole-containing compounds. In the first chapter, the synthetic route to an unnatural boron and nitrogen-containing analogue of tryptophan (BN-tryptophan) via late-stage functionalization of BN-indole is disclosed and its spectroscopic properties are reported with respect to the natural amino acid, tryptophan. The incorporation of BN-tryptophan into proteins expressed in E. coli using selective pressure incorporation, a residue specific method of unnatural amino acid incorp

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16

Ishibashi, Jacob Shotaro Afaga. "BN Isosteres of Acenes for Potential Applications in Optoelectronic Devices." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:107613.

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Thesis advisor: Shih-Yuan Liu<br>This dissertation describes progress in the field of polycyclic boron- nitrogen-containing systems, especially for potential application in organic-based optoelectronic devices and hydrogen storage materials. The replacement of a BN unit for a CC unit organic compounds (BN/CC isosterism) can have a profound effect on the electronic structure and even function of a given molecular topology without changing its physical structure very much. Direct comparison between a BN-containing molecule and its direct all-carbon analogue is crucial to establishing the origin

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17

Boffa, Maria. "Atropisomeric 1,2-dibenzoazaborines: Synthesis and Dynamic Studies." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16117/.

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In this thesis project we have studied new atropisomeric molecules that have a nitrogen-boron bond in an aromatic cyclic system, namely the 1,2-dibenzoazaborine structure. We have synthesized molecules that have a stereogenic boron-aryl axis with different steric hindrance in the ortho position of the aryl ring (compounds 5). The synthesis reaction was optimized for compound 5a and then we introduced a chirality probe to follow the dynamic process by NMR (e.g. an ethyl group in product 5b and an isopropyl group in the product 5c). We have analyzed the molecules with NMR spectroscopy at variabl

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18

Mercanti, Elia. "Synthesis and dynamic study of atropisomeric compounds containing boron-carbon bond." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10067/.

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In this thesis we studied the stereodynamic behavior of 1,2-azaborines variously substituted on boron (7a, 7b, 13). Depending on the hindrance of the asymmetric aryl substituent the resulting conformations could be stereolabile or configurationally stable. Through dynamic NMR and lineshape simulation, the energy rotational barriers of the different conformers are obtained. When the barrier is higher than 22-23 kcal/mol stable atropisomers that are fisically separable could be obtained (case of compound 13) and the free activation energy barrier is determinable by kinetic analysis. Absolute con

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19

Lo, Shih-Han, and 羅仕翰. "Design and Synthesis of 1,4-Azaborine derivatives as Blue and Green TADF Emitters." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/87b6nz.

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