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001-es BibID:	BIBFORM068522
035-os BibID:	(Wos)000395089200045 (Scopus)85010931300
Első szerző:	Lázár László (vegyész)
Cím:	Unprecedented [beta]-manno type thiodisaccharides with a C-glycosylic function by photoinitiated hydrothiolation of 1-C-substituted glycals / László Lázár, László Juhász, Gyula Batta, Anikó Borbás, László Somsák
Dátum:	2017
ISSN:	1144-0546 1369-9261
Megjegyzések:	Free-radical hydrothiolation of O-peracylated 1-C-(carbamoyl-, methoxycarbonyl- and cyano) substituted glycals with a range of sugar derived thiols gave the corresponding ?-manno type 3-deoxy-3-S-disaccharides with full regio- and stereoselectivity. The configuration of the glycals (arabino vs. lyxo) and the size of the protecting groups had no significant effect on the outcome of the transformations. Formation of by-products was tracked down by LCMS studies and correlated with the electron density of the double bonds to show that the reactions were synthetically useful with a COOMe and especially with a CONH2 group as the 1-C-substituent.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	New Journal of Chemistry. - 41 : 3 (2017), p. 1284-1292. -
További szerzők:	Juhász László (1973-) (vegyész) Batta Gyula (1953-) (molekula-szerkezet kutató) Borbás Anikó (1965-) (vegyész) Somsák László (1954-) (vegyész)
Pályázati támogatás:	109450 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM079611
035-os BibID:	(WoS)000412639800022 (Scopus)85030979850
Első szerző:	Matyuska Ferenc
Cím:	Control of structure, stability and catechol oxidase activity of copper(II) complexes by the denticity of tripodal platforms / Ferenc Matyuska, Nóra V. May, Attila Bényei, Tamás Gajda
Dátum:	2017
ISSN:	1144-0546 1369-9261
Megjegyzések:	Copper(II) complexes of a new polydentate tripodal ligand trenpyz (L, tris[2-(5-pyrazolylmethyl)aminoethyl]- amine) were characterized in both solution and solid states. A combined evaluation of potentiometric UV-Vis and EPR data provided both thermodynamic and structural information on the complexes formed in solution. In equimolar solution the highly stable square pyramidal CuHL and trigonal bipyramidal CuL are the dominant species at around pH 3 and 5?8, respectively. Above pH 8 further deprotonation was observed (pK = 9.56), which is related to the formation of a copper(II)-bound pyrazolate anion. This creates the possibility for the formation of oligonuclear complexes, through pyrazolate bridges, and at a 3/2 Cu(II)/L ratio three trinuclear complexes were identified, similar to the copper(II)-tachpyz (N,N0 ,N00-tris(5-pyrazolylmethyl)-1,3,5-cis,cis-triamino-cyclohexane) system studied earlier. The trinuclear complexes of the two ligands have considerably different speciations, due to the different denticities of tripodal platforms. At the optimal pH the catechol oxidase activities of the triply deprotonated trinuclear complexes of trenpyz and tachpyz are similar, but the pH-rate constant profiles are significantly different, as a consequence of the deviations in their speciation. Consequently, the H2dtbc oxidation promoted by these trinuclear complexes can be easily controlled by the denticity of the tripodal ligands, since it affects the coordination environment of the central metal ion, which is proposed to be the main actor during the reaction.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	New Journal Of Chemistry. - 41 : 20 (2017), p. 11647-11660. -
További szerzők:	May Nóra Veronika Bényei Attila (1962-) (vegyész) Gajda Tamás
Pályázati támogatás:	GINOP-2.3.2-15-2016-00038 GINOP OTKA 101541 OTKA OTKA 115762 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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