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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F05%3A00003215%21RIV08-GA0-25310___
rdf:type
n20:Vysledek skos:Concept
dcterms:description
In recent years, it intensively increases development of synthesis and characterisation of new chiral ligands and their transition metal complexes. These complexes are especially used as a homogeneous catalysts in asymmetric synthesis. Main advantage of our N,N-bidentate ligands is impossiblity of their racemisation as in case oxazolines. These new ligands were prepared analogous to 2,6-bis(4-isopropyl-4-methyl-4,5-dihydro-1H-imidazol-5-on-2-yl)pyridines described in our previous paper, from optically pure 2-amino-2,3-dimethylbutanamides and ethyloxycarbonyl pyridine 2-carboxylic acid, followed by subsequent ring closure reaction giving 4,5-dihydro-1H-imidazol-5-one. The last step was N-alkylation of 4,5-dihydro-1H-imidazol-5-one by different alkylation agents. Ligands prepared in this way were characterised using 1H and 13C NMR spectroscopy. Finally were prepared complexes of ligands with cobalt(II) and copper(II) salts, which structures were confirmed by X-ray diffraction. These metal complexes were In recent years, it intensively increases development of synthesis and characterisation of new chiral ligands and their transition metal complexes. These complexes are especially used as a homogeneous catalysts in asymmetric synthesis. Main advantage of our N,N-bidentate ligands is impossiblity of their racemisation as in case oxazolines. These new ligands were prepared analogous to 2,6-bis(4-isopropyl-4-methyl-4,5-dihydro-1H-imidazol-5-on-2-yl)pyridines described in our previous paper, from optically pure 2-amino-2,3-dimethylbutanamides and ethyloxycarbonyl pyridine 2-carboxylic acid, followed by subsequent ring closure reaction giving 4,5-dihydro-1H-imidazol-5-one. The last step was N-alkylation of 4,5-dihydro-1H-imidazol-5-one by different alkylation agents. Ligands prepared in this way were characterised using 1H and 13C NMR spectroscopy. Finally were prepared complexes of ligands with cobalt(II) and copper(II) salts, which structures were confirmed by X-ray diffraction. These metal complexes were Syntéza a charakterizace nových chirálních ligandů a komplexů s přechodnými kovy patří mezi nejvíce se rozvíjející oblasti organické chemie. Tyto komplexy jsou velmi často používány jako enantioselekivní katalyzátory pro asymetrické reakce. Hlavní výhodou našich N,N-bidentátních ligandů oproti oxazolinovým ligandům je to, že nemohou racemizovat. Tyto nové ligandy byly připraveny analogicky jako 2,6-bis(4-isopropyl-4-methyl-4,5-dihydro-1H-imidazol-5-on-2-yl)pyridiny, jejichž syntéza byla popsána v předchozí publikaci z opticky čistých 2-amino-2,3-dimethylbutanamidů a ethyloxykarbonyl pyridin-2-karboxylové kyseliny. Takto připravený acylovaný aminoamid byl cyklizován v bázickém prostředí na příslušné 4,5-dihydro-1H-imidazol-5-ony. V posledním kroku byla provedena N-alkylace 4,5-dihydro-1H-imidazol-5-onů různými alkylačními činidly. Připravené ligandy byly charakterizovány pomocí 1H a 13C NMR spektroskopie. Byly připraveny komplexy těchto ligandů s kobaltem(II) a mědí(II) a byly charakterizovány pomocí r
dcterms:title
Novel Chiral Ligands and Their Metal Complexes Based on Substituted Imidazolylpyridines Novel Chiral Ligands and Their Metal Complexes Based on Substituted Imidazolylpyridines Nové chirální ligandy a jejich komplexy na bázi substituovaných imidazolinpyridinů
skos:prefLabel
Novel Chiral Ligands and Their Metal Complexes Based on Substituted Imidazolylpyridines Nové chirální ligandy a jejich komplexy na bázi substituovaných imidazolinpyridinů Novel Chiral Ligands and Their Metal Complexes Based on Substituted Imidazolylpyridines
skos:notation
RIV/00216275:25310/05:00003215!RIV08-GA0-25310___
n4:strany
PO-42
n4:aktivita
n16:P
n4:aktivity
P(GA203/04/0646)
n4:dodaniDat
n11:2008
n4:domaciTvurceVysledku
n12:1357727 n12:4978684 n12:6034543
n4:druhVysledku
n21:D
n4:duvernostUdaju
n13:S
n4:entitaPredkladatele
n19:predkladatel
n4:idSjednocenehoVysledku
533330
n4:idVysledku
RIV/00216275:25310/05:00003215
n4:jazykVysledku
n17:eng
n4:klicovaSlova
Ligands; Complexes; Imidazolinone derivatives
n4:klicoveSlovo
n5:Complexes n5:Ligands n5:Imidazolinone%20derivatives
n4:kontrolniKodProRIV
[E699EAF7F878]
n4:mistoKonaniAkce
Brno (Česká republika)
n4:mistoVydani
Brno
n4:nazevZdroje
11th Blue Danube Symposium on Heterocyclic Chemistry
n4:obor
n10:CC
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
4
n4:projekt
n18:GA203%2F04%2F0646
n4:rokUplatneniVysledku
n11:2005
n4:tvurceVysledku
Keder, Roman Sedlák, Miloš Drabina, Pavel Hanusek, Jiří
n4:typAkce
n6:WRD
n4:zahajeniAkce
2005-08-28+02:00
s:numberOfPages
1
n9:hasPublisher
Masarykova Universita Brno
n14:isbn
80-210-3763-6
n8:organizacniJednotka
25310