Št. zadetkov: 14
Pregledni znanstveni članek
Oznake:
Background Implants in dentistry are, besides fixed, removable and maxillofacial prosthodontics, one of the reliable possibility to make functional and aesthetic rehabilitation of the edentulism. Surgical and prosthodontic implant complications are often an inattentive consequence of wrong diagnosis ...
Leto:
2007
Vir:
dLib.si Digitalna knjižnica Slovenije
Magistrsko delo
Oznake:
N-heterociklični karbeni;NHC;organokataliza;magistrska dela;
Dolga leta so karbeni veljali le za nestabilne reakcijske intermediate v
organskih reakcijah. Vendar pa je sinteza stabilnih karbenov in njihov katalitski potencial
v zadnjih letih pritegnila številne raziskovalce.
V tem delu je naravno prisotna (1R)-(+)-kafra služila kot osnova za sintezo N- ...
Leto:
2023
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Magistrsko delo
Oznake:
fotoredoks kemija;fotoredoks katalizatorji;bakrovi kompleksi;radikalska verižna reakcija;ATRA;sulfeniliranje;magistrska dela;
Fotokemija omogoča pretvorbe, ki dopolnjujejo tradicionalne dvoelektronske reakcije in odpirajo vrata sinteznim pretvorbam, ki so bile nekoč zahtevne ali nedostopne. Pogost primer fotokemijske reakcije je adicija radikalov s prenosom atomov (ATRA), ki predstavlja enostaven način uvedbe različnih fun ...
Leto:
2024
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Izvirni znanstveni članek
Oznake:
beta-laktami;fotokataliza;sulfonamidi;sulfamoil kloridi;beta-lactams;photocatalysis;sulfonamides;sulfamoyl chlorides;
Sulfonyl chlorides are a synthetically attractive source of sulfonyl radicals in photoredox catalysis and are useful precursors in the synthesis of sulfones. Sulfamoyl chlorides, on the other hand, remain poorly represented despite their similar potential. In this study, N-chlorosulfonylated β-lacta ...
Leto:
2024
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Izvirni znanstveni članek
Oznake:
kinolizini;pirido[1,2-a]pirimidini;tiazolo[3,2-a]pirimidini;fotoredoks kataliza;arilacija;spajanje;quinolizines;pyrido[1,2-a]pyrimidines;thiazolo[3,2-a]pyrimidines;photoredox catalysis;arylation;cross-coupling;
Irradiation of mixtures of title diazonium salts and heteroarenes with green light (510 nm) in the presence of eosin Y disodium salt (EY-Na$_2$) as a photocatalyst furnished the corresponding arylation products in 8−63% yields. The proposed photocatalytic cycle is analogous to that proposed previous ...
Leto:
2023
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Strokovna monografija
Oznake:
teleterapija;brahiterapija;prehrana;kemoterapija;stranski učinki;
Leto:
2023
Vir:
Onkološki inštitut Ljubljana (OI)
Izvirni znanstveni članek
Oznake:
ketopinska kislina;amidiranje;redukcija;diamini;N-heterociklični prekurzorji karbena;asimetrična kataliza;amidinijeve soli;hidroliza;ketopinic acid;amidation;reduction;diamines;N-heterocyclic carbene precursors;asymmetric catalysis;amidinium salts;hydrolysis;
The endo- and exo-N-heterocyclic carbene precursors based on camphor were prepared
diastereoselectively in five synthetic steps starting from (1S)-(+)-ketopinic acid. The obtained Nheterocyclic carbene precursors were investigated in an asymmetric benzoin reaction. All newcompounds were fully chara ...
Leto:
2023
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Izvirni znanstveni članek
Oznake:
rutenijeva kataliza;heterocikli;C-H aktivacija;piridoni;2-bromopiridini;ruthenium catalysis;heterocycles;C-H activation;pyridones;2-bromopyridines;
A novel methodology for the synthesis of 2-pyridones bearing a 2-pyridyl group on nitrogen and carbon atoms, starting from 2-bromopyridines, was developed employing a simple Ru(II)–KOPiv–Na$_2$CO$_3$ catalytic system. Unsubstituted 2-bromopyridine was successfully converted to the penta-heteroarylat ...
Leto:
2024
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Izvirni znanstveni članek
Oznake:
organokatalizatorji;piroloni;spiroheterociklizacija;3-izotiocianato oksindoli;kaskadne reakcije;spiro spojine;organocatalysis;pyrrolones;spiroheterocyclization;3-isothiocyanato oxindoles;cascade reaction;spiro compounds;
Arylidene-∆$^2$-pyrrolin-4-ones undergo organocatalyzed double spirocyclization with 3-isothiocianato oxindoles in a domino 1,4/1,2-addition sequence. The products contain three contiguous stereocenters (ee up to 98%, dr up to 99:1, 12 examples). The absolute configuration of the major diastereomer ...
Leto:
2020
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)
Izvirni znanstveni članek
Oznake:
organokataliza;asimetrična sinteza;enantioselektivnost;učinki topil;piroloni;psevdo-enantiomerne konformacije katalizatorja;organocatalysis;asymmetric synthesis;enantioselectivity;solvent effects;pyrrolone;pseudo-enantiomeric catalyst conformations;
Arylidene-Δ2-pyrrolin-4-ones undergo organocatalyzed annulation with malononitrile, furnishing dihydropyrano[3,2-b]pyrroles (18 examples, 0–77% ee in dichloromethane, 11–44% ee in methanol). The products could be enantiomerically enriched by trituration (11 examples, 95–99% ee). Enantioselectivity w ...
Leto:
2022
Vir:
Fakulteta za kemijo in kemijsko tehnologijo (UL FKKT)