Synthesis and NMR studies of new DOTP-like lanthanide(III) complexes containing a hydrophobic substituent on one phosphonate side arm.
Identifieur interne : 000719 ( PubMed/Curation ); précédent : 000718; suivant : 000720Synthesis and NMR studies of new DOTP-like lanthanide(III) complexes containing a hydrophobic substituent on one phosphonate side arm.
Auteurs : X. Li [États-Unis] ; S. Zhang ; P. Zhao ; Z. Kovacs ; A D SherrySource :
- Inorganic chemistry [ 0020-1669 ] ; 2001.
Descripteurs français
- KwdFr :
- Animaux, Chimie physique, Coeur (), Composés organiques du phosphore (), Conformation moléculaire, Hydrolyse, Lanthanides (), Lanthanides (synthèse chimique), Ligands, Mâle, Nitrobenzènes, Phosphonates (), Phosphonates (synthèse chimique), Rat Sprague-Dawley, Rats, Sodium (), Spectroscopie par résonance magnétique, Structure moléculaire, Stéréoisomérie, Techniques in vitro, Thulium (), Ytterbium ().
- MESH :
- synthèse chimique : Lanthanides, Phosphonates.
- Animaux, Chimie physique, Coeur, Composés organiques du phosphore, Conformation moléculaire, Hydrolyse, Lanthanides, Ligands, Mâle, Nitrobenzènes, Phosphonates, Rat Sprague-Dawley, Rats, Sodium, Spectroscopie par résonance magnétique, Structure moléculaire, Stéréoisomérie, Techniques in vitro, Thulium, Ytterbium.
English descriptors
- KwdEn :
- Animals, Chemistry, Physical, Heart (drug effects), Hydrolysis, In Vitro Techniques, Lanthanoid Series Elements (chemical synthesis), Lanthanoid Series Elements (chemistry), Ligands, Magnetic Resonance Spectroscopy, Male, Molecular Conformation, Molecular Structure, Nitrobenzenes, Organophosphonates (chemical synthesis), Organophosphonates (chemistry), Organophosphorus Compounds (chemistry), Physicochemical Phenomena, Rats, Rats, Sprague-Dawley, Sodium (chemistry), Stereoisomerism, Thulium (chemistry), Ytterbium (chemistry).
- MESH :
- chemical , chemical synthesis : Lanthanoid Series Elements, Organophosphonates.
- chemical , chemistry : Lanthanoid Series Elements, Organophosphonates, Organophosphorus Compounds, Sodium, Thulium, Ytterbium.
- drug effects : Heart.
- Animals, Chemistry, Physical, Hydrolysis, In Vitro Techniques, Ligands, Magnetic Resonance Spectroscopy, Male, Molecular Conformation, Molecular Structure, Nitrobenzenes, Physicochemical Phenomena, Rats, Rats, Sprague-Dawley, Stereoisomerism.
Abstract
Three derivatives of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylene phosphonic acid) (DOTP) containing a hydrophobic substituent on one side chain were prepared and their lanthanide complexes examined by NMR. The new ligands include 1-(1-octyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(8)-DOTP), 1-(1-undecyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(11)-DOTP), and 1-(1-4-nitro-phenyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (NO(2)-Ph-DOTP). (1)H NMR spectra of the ytterbium(III) complexes were assigned by using a combination of COSY spectroscopy and a fitting procedure that matches experimental NMR hyperfine shifts with those estimated from a MMX-derived structure. The analysis showed that a single isomer is present in solution and that the bulky hydrophobic substituent occupies the less sterically demanding H(6) equatorial position in the YbL(5)(-) complexes. Although the YbL(5)(-) complexes have lower symmetry due to the added substituent, the average (1)H hyperfine shifts are 5-10% larger in these complexes compared to YbDOTP(5)(-). This was magnified further in the hyperfine (23)Na NMR shifts of ion-paired sodium ions where the extracellular Na(+) signal in perfused rat hearts displayed a 28% larger hyperfine shift in the presence of Tm(C(11)-DOTP)(5)(-) than with an equivalent amount of TmDOTP(5)(-).
PubMed: 11735465
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pubmed:11735465Le document en format XML
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<front><div type="abstract" xml:lang="en">Three derivatives of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylene phosphonic acid) (DOTP) containing a hydrophobic substituent on one side chain were prepared and their lanthanide complexes examined by NMR. The new ligands include 1-(1-octyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(8)-DOTP), 1-(1-undecyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(11)-DOTP), and 1-(1-4-nitro-phenyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (NO(2)-Ph-DOTP). (1)H NMR spectra of the ytterbium(III) complexes were assigned by using a combination of COSY spectroscopy and a fitting procedure that matches experimental NMR hyperfine shifts with those estimated from a MMX-derived structure. The analysis showed that a single isomer is present in solution and that the bulky hydrophobic substituent occupies the less sterically demanding H(6) equatorial position in the YbL(5)(-) complexes. Although the YbL(5)(-) complexes have lower symmetry due to the added substituent, the average (1)H hyperfine shifts are 5-10% larger in these complexes compared to YbDOTP(5)(-). This was magnified further in the hyperfine (23)Na NMR shifts of ion-paired sodium ions where the extracellular Na(+) signal in perfused rat hearts displayed a 28% larger hyperfine shift in the presence of Tm(C(11)-DOTP)(5)(-) than with an equivalent amount of TmDOTP(5)(-).</div>
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<Abstract><AbstractText>Three derivatives of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylene phosphonic acid) (DOTP) containing a hydrophobic substituent on one side chain were prepared and their lanthanide complexes examined by NMR. The new ligands include 1-(1-octyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(8)-DOTP), 1-(1-undecyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (C(11)-DOTP), and 1-(1-4-nitro-phenyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-1,4,7,10-tetraazacyclododecane (NO(2)-Ph-DOTP). (1)H NMR spectra of the ytterbium(III) complexes were assigned by using a combination of COSY spectroscopy and a fitting procedure that matches experimental NMR hyperfine shifts with those estimated from a MMX-derived structure. The analysis showed that a single isomer is present in solution and that the bulky hydrophobic substituent occupies the less sterically demanding H(6) equatorial position in the YbL(5)(-) complexes. Although the YbL(5)(-) complexes have lower symmetry due to the added substituent, the average (1)H hyperfine shifts are 5-10% larger in these complexes compared to YbDOTP(5)(-). This was magnified further in the hyperfine (23)Na NMR shifts of ion-paired sodium ions where the extracellular Na(+) signal in perfused rat hearts displayed a 28% larger hyperfine shift in the presence of Tm(C(11)-DOTP)(5)(-) than with an equivalent amount of TmDOTP(5)(-).</AbstractText>
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