Pārgrupēšanās reakcijas jonu šķidrumu vidē
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Latvijas Universitāte
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lav
Abstract
Promocijas darbs „Pārgrupēšanās reakcijas jonu šķidrumu vidē” ir veltīts šobrīd starpvalstu mērogā aktuālam, lielu popularitāti ieguvušam tematam – jonu škidrumiem. Darbā apkopots pētījums par trim pēc to norises mehānisma atškirīgām organisko vielu pārvērtībām – Frisa, Bekmana un Klaizena pārgrupēšanas reakcijām jonu škidrumu vidēs. Darba aktualitāte ir saistīta ar organisko škīdinātāju aizstāšanu pret videi draudzīgākiem materiāliem – jonu škidrumiem minētajās pārgrupēšanās reakcijās. Tā kā jonu škidrumi tiek uzskatīti par „dizainera veidotiem škīdinātājiem”, tad, pastāvot to struktūras elementu dažādām variācijām, ir iespējams izvēlēties atbilstošām reakcijām vispiemērotākos jonu škidrumus. Promocijas darbā analizēta jonu škidrumu katjonu un anjonu struktūras elementu un dažādu Luisa skābju ietekme uz minēto pārgrupēšanās reakciju ātrumiem un produktu sadalījumiem. Darbā novērtēta JŠ polaritātes, katjona veida, hidrofobuma, ūdeņraža saites veidošanās, anjona veida un katalizatora ietekme uz pārgrupēšanās reakciju norisi.
Ph.D. theses „Rearrangement reactions in ionic liquid media” are devoted to the subject that has gained great actuality and large popularity today - ionic liquids. The research about three different by reaction mechanisms organic transformations – Fries, Beckmann and Claisen rearrangement reactions in ionic liquid media is discussed in the thesis. The novelty of the research is connected with the replacement of organic solvents with environmentally friendly materials – ionic liquids in the mentioned rearrangement reactions. As ionic liquids are considered a “designer made solvents“, it is possible to select the most appropriate ionic liquids for the corresponding reactions. The impact of the structure of the cation and the anion in ionic liquids, as well as the type of Lewis acid on the selected rearrangement reaction rates and the distributions of products are analyzed in the Ph.D. theses. The impact of the polarity, as well as the type of cation, hydrophobicity, the hydrogen bonding formation ability, the type of anion and the catalyst are evaluated on the three rearrangement reactions.
Ph.D. theses „Rearrangement reactions in ionic liquid media” are devoted to the subject that has gained great actuality and large popularity today - ionic liquids. The research about three different by reaction mechanisms organic transformations – Fries, Beckmann and Claisen rearrangement reactions in ionic liquid media is discussed in the thesis. The novelty of the research is connected with the replacement of organic solvents with environmentally friendly materials – ionic liquids in the mentioned rearrangement reactions. As ionic liquids are considered a “designer made solvents“, it is possible to select the most appropriate ionic liquids for the corresponding reactions. The impact of the structure of the cation and the anion in ionic liquids, as well as the type of Lewis acid on the selected rearrangement reaction rates and the distributions of products are analyzed in the Ph.D. theses. The impact of the polarity, as well as the type of cation, hydrophobicity, the hydrogen bonding formation ability, the type of anion and the catalyst are evaluated on the three rearrangement reactions.