Parahydrogen induced polarization in face of keto-enol tautomerism: proof of concept with hyperpolarized ethanol.
Parahydrogen induced polarization in face of keto-enol tautomerism: proof of concept with hyperpolarized ethanol.
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面对酮-烯醇互变异构现象的仲氢诱导极化:超极化乙醇的概念证明
DOI:
10.1039/c2cp40272f
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
U. Bommerich
中科院分区:
文献类型:
--
作者:
Th. Trantzschel;J. Bernarding;M. Plaumann;D. Lego;T. Gutmann;T. Ratajczyk;S. Dillenberger;G. Buntkowsky;J. Bargon;U. Bommerich
Hyperpolarization (HP) techniques are increasingly important in magnetic resonance imaging (MRI) and spectroscopy (MRS). HP methods have the potential to overcome the fundamentally low sensitivity of magnetic resonance (MR). A breakthrough of HP-MR in life sciences and medical applications is still limited by the small number of accessible, physiologically relevant substrates. Our study presents a new approach to extend PHIP to substrates that primarily cannot be hyperpolarized due to a steady intramolecular re-arrangement, the so-called keto–enol tautomerism. To overcome this obstacle we exploited the fact that instead of the instable enol form the corresponding stable ester can be used as a precursor molecule. This strategy now enables the hydrogenation which is required to apply the standard PHIP procedure. As the final step a hydrolysis is necessary to release the hyperpolarized target molecule. Using this new approach ethanol was successfully hyperpolarized for the first time. It may therefore be assumed that the outlined multi-step procedure can be used for other keto–enol tautomerized substances thereby opening the application of PHIP to a multitude of molecules relevant to analyzing metabolic pathways.
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DOI:
10.1073/pnas.1010570107
发表时间:
2010-10-05
影响因子:
11.1
作者:
Pileio, Giuseppe;Carravetta, Marina;Levitt, Malcolm H.
通讯作者:
Levitt, Malcolm H.
DOI:
10.1513/pats.200507-071ds
发表时间:
2005-01-01
期刊:
Proceedings of the American Thoracic Society
影响因子:
--
作者:
van Beek, Edwin J R;Wild, Jim M
通讯作者:
Wild, Jim M
影响因子:
4
作者:
Boutain, Marie;Duckett, Simon B.;Lopez-Serrano, Joaquin
通讯作者:
Lopez-Serrano, Joaquin
影响因子:
--
作者:
F. Reineri;Alessandra Viale;W. Dastrù;R. Gobetto;S. Aime
通讯作者:
S. Aime
DOI:
--
发表时间:
2011
期刊:
Physics Conference Series
影响因子:
--
作者:
M. Tanaka;T. Kunimatsu;M. Fujiwara;H. Utsuro;M. Yosoi;S. Ono;K. Fukuda;K. Takamatsu;K. Ueda;J. P. Didelez;G. Frossati;and A. de Waard
通讯作者:
and A. de Waard