magistrsko delo
Povzetek
Tvorba novih C–C vezi je v kemiji pomembna za pripravo strukturno kompleksnih produktov. Zelo eleganten pristop za tvorbo novih ogljik-ogljik vezi je preko neposredne C–H aktivacije. C–H funkcionalizacija nam je omogočila doseg regioselektivnosti, saj imajo naši substituirani kinazolini bogata reaktivna mesta. Kinazolini so pogosto gradnik v naravnih virih, kot tudi farmacevtskih učinkovinah in imajo širok spekter bioloških lastnosti, zato so zanimivi za raziskovanje. V magistrskem delu smo preučevali direktno rutenij/paladij dvojno C–H ariliranje 2-substituiranih kinazolinov 6. Raziskovali in optimizirali smo tako prvo rutenij(II)-katalizirano, kot tudi paladij(II)-katalizairano stopnjo reakcije. V primeru obeh s kovino kataliziranih reakcij smo preverili vpliv različnih katalizatorjev, medija, baze, liganda, aditiva, temperature, ter količine dodanih reagentov. S končnimi optimiziranimi pogoji rutenij-katalizirane stopnje smo sintetizirali, očistili in okaraktezirali monoarilirane produkte 10 v primeru tiofenskega, kot tudi furanskega kinazolinskega derivata z dobrimi izkoristki (23–67 %). Najboljši pogoji paladij-katalizirane stopnje pa so nam prav tako omogočili sintezo, s sledečim čiščenjem in karakterizacijo končnih diariliranih produktov 14 (26–52 %). V zadnjem delu smo preverili tudi uspešnost »one-pot« metode, brez vmesne izolacije intermediata. Izkazala se je za enako primerno in enostavnejšo sintezno pot, saj smo dosegli primerljive izkoristke izvedenih reakcij.
Ključne besede
organske reakcije;C-H aktivacija;funkcionalizacija;substituirani kinazolini;'one-pot' metoda;kataliza;rutenij;paladij;magistrska dela;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2020 |
Tipologija: |
2.09 - Magistrsko delo |
Organizacija: |
UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
Založnik: |
[M. Kastner] |
UDK: |
547.831:66.095.257(043.2) |
COBISS: |
20947203
|
Št. ogledov: |
709 |
Št. prenosov: |
207 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Ruthenium/palladium sequential arylation of heteroaryl quinazoline derivatives |
Sekundarni povzetek: |
The formation of new C–C bonds is important in chemistry for the preparation of structurally complex products. A very elegant approach for the formation of new carbon-carbon bonds is through direct C–H activation. C–H functionalization allowed us to reach regioselectivity, since our substituted quinazolines have abundant reactive sites. Quinazolines are often a building block in natural sources as well as pharmaceutical substances and have a wide range of biological properties, which is why they are interesting for further exploration. In the master’s thesis we studied directed ruthenium/palladium double CH arylation of 2-substituted quinazolines 6. Both ruthenium(II)- and palladium(II)-catalysed reaction rates were investigated and optimized. in both metal-catalysed reaction steps, the effect of different catalysts, medium, base, ligand, additive, temperature, and the amount of reagents used were checked. With the final optimized reaction conditions of the ruthenium-catalysed step, the monoarylated products 10 were synthesized, purified and characterized in the case of the thiophene as well as the furan derivative in good yields (23-67%). The best conditions of the palladium-catalysed step also allowed us to synthesize, with subsequent purification and characterization of the final diarylated products 14 (26-52%). In the last part, we also checked the performance of the one-pot method, without the need to isolate the intermediate. It proved to be an equally appropriate and simpler synthesis protocol, as we achieved comparable yields of the performed reactions. |
Sekundarne ključne besede: |
C-H activation;functionalisation;substituted quinazolines;'one-pot' method; |
Vrsta dela (COBISS): |
Magistrsko delo/naloga |
Študijski program: |
1000375 |
Konec prepovedi (OpenAIRE): |
1970-01-01 |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemija |
Strani: |
98 str. |
ID: |
11868137 |