Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Kerti Ausmees"'
Publikováno v:
Journal of Magnetic Resonance Open, Vol 21, Iss , Pp 100171- (2024)
Non-hydrogenative PHIP (nh-PHIP) is an NMR signal enhancement technique that offers several orders of magnitude gains in detection sensitivity. It is one of the few hyperpolarization methods that have been demonstrated to be applicable to chemical an
Externí odkaz:
https://doaj.org/article/7982db57729946d6b038489e60af17b5
Publikováno v:
Molecules, Vol 27, Iss 3, p 802 (2022)
Parahydrogen hyperpolarization has emerged as a promising tool for sensitivity-enhanced NMR metabolomics. It allows resolution and quantification of NMR signals of certain classes of low-abundance metabolites that would otherwise be undetectable. App
Externí odkaz:
https://doaj.org/article/f2548d916dc8492cb3cbf5fe8b061765
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 6, Pp o1324-o1324 (2011)
In the title compound, C10H22N22+·2Br−, a precursor in the synthesis of organocatalysts, the bipiperidinium ion is located on a twofold rotation axis which passes through the mid-point of the central C—C bond. The piperidinium ring adopts a chai
Externí odkaz:
https://doaj.org/article/eff45a450fd748c1a3fd80e2be85e0b1
Publikováno v:
Chemical Communications. 58:463-466
Parahydrogen hyperpolarization has been shown to enhance NMR sensitivity in urine analysis by several orders of magnitude if urine samples are prepared by solid phase extraction (SPE). We present a different approach, developed for minimal sample alt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61ab5933cb48d4169c7751d5cdb41e41
https://doi.org/10.1039/d1cc05665d
https://doi.org/10.1039/d1cc05665d
Publikováno v:
Analytical Chemistry. 93:9480-9485
Nuclear magnetic resonance spectroscopy (NMR) is a valuable analytical tool with applications in a vast array of research fields from chemistry and biology to medicine and beyond. NMR is renowned for its straightforward data interpretation and quanti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0134d96ca0c82f0189488d0776eab360
https://doi.org/10.1021/acs.analchem.1c01281
https://doi.org/10.1021/acs.analchem.1c01281
Publikováno v:
Molecules, Vol 27, Iss 802, p 802 (2022)
Parahydrogen hyperpolarization has emerged as a promising tool for sensitivity-enhanced NMR metabolomics. It allows resolution and quantification of NMR signals of certain classes of low-abundance metabolites that would otherwise be undetectable. App
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11392a8e76ddf389ef93b115ec9d970b
https://www.mdpi.com/1420-3049/27/3/802
https://www.mdpi.com/1420-3049/27/3/802
Autor:
Ivar Järving, Kerti Ausmees, Margus Lopp, Tõnis Pehk, Franz Werner, Kadri Kriis, Tõnis Kanger
Publikováno v:
The Journal of Organic Chemistry. 77:10680-10687
A general three-component triple cascade reaction through an iminium-enamine-iminium sequential activation initiated by a hetero-Michael addition to α,β-unsaturated aldehydes affords [3.2.0]heterobicycles in high diastereoselectivity. The rate and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1781e7a1c50775103b378bf2f8737a7
https://doi.org/10.1021/jo3019413
https://doi.org/10.1021/jo3019413
Publikováno v:
Organic Letters. 12:2230-2233
A novel multicomponent cascade reaction led to the formation of a strained 3-azabicyclo[3.2.0]heptane derivative 4. The unstable ester 4 was reduced in a one-pot procedure to a stable alcohol 6. The formation of the bicyclic product is highly diaster
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a4f3963d1f0b7da8031d86416d74252
https://doi.org/10.1021/ol1005714
https://doi.org/10.1021/ol1005714
Autor:
Franz Werner, Tõnis Kanger, Ivar Jaerving, Kerti Ausmees, Tõnis Pehk, Margus Lopp, Kadri Kriis
Publikováno v:
ChemInform. 44
Treatment of secondary amines with α,β-unsaturated aldehydes and 4-hydroxycrotonates or 4-aminocrotonates allows a diastereoselective access to trisubstituted [3.2.0]-heterobicyclic systems.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c40fb8ff21b894084316be942cf9fd7d
https://doi.org/10.1002/chin.201323093
https://doi.org/10.1002/chin.201323093
Publikováno v:
ChemInform. 44
New 3-azabicycloheptane derivatives (IV) are synthesized via a multicomponent cascade reaction and resolved by kinetic enzymatic resolution with immobilized lipase B.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3230a2a529d0c3dd4d0decec6952d26a
https://doi.org/10.1002/chin.201303103
https://doi.org/10.1002/chin.201303103