Výsledky vyhledávání - "Paula Aulaskari"

7-(2-Oxoalkoxy)coumarins: Synthesis and Anti-Inflammatory Activity of a Series of Substituted Coumarins

Autor: Katriina Vuolteenaho, Eeva Moilanen, Juri M. Timonen, Janne Jänis, Tiina Leppänen, Riina Nieminen, Paula Aulaskari

Publikováno v: Journal of Heterocyclic Chemistry. 52:1286-1295

A series of 7-(2-oxoalkoxy)coumarins have been synthesized by conjugating substituted 7-hydroxycoumarins with different chloroketones. The anti-inflammatory properties of 7-(2-oxoalkoxy)coumarins were studied in LPS-induced inflammatory response in J

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfbd21bf2579e6bbf2325b33e6801d21
https://doi.org/10.1002/jhet.2173

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Low-energy collision-induced dissociation tandem mass spectrometry of 7-acetonyloxycoumarins

Autor: Janne Jänis, Juri M. Timonen, Ritva Romppanen, Paula Aulaskari

Publikováno v: Rapid Communications in Mass Spectrometry. 27:2665-2675

RATIONALE Coumarins are naturally occurring, oxygen-containing heterocycles with considerable pharmaceutical potential. For structural elucidation of natural or synthetic coumarins, tandem mass spectrometry (MSn) represents an essential tool. In this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e432a852b69860521a1c193a0bd3e25
https://doi.org/10.1002/rcm.6735

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Negative Ion Electrospray Ionization Mass Spectrometry and Computational Studies on Substituted 7-Hydroxycoumarins

Autor: Juri M. Timonen, Pipsa Hirva, Pirjo Vainiotalo, Paula Aulaskari

Publikováno v: European Journal of Mass Spectrometry. 15:595-603

Twenty-two substituted 7-hydroxycoumarins were studied by negative ion electrospray ionization collision-induced dissociation (CID) mass spectrometry. Fragmentation pathways were also investigated by computation method using the B3LYP density functio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::358a7f749e9cea8ae739a4b0bd27c226
https://doi.org/10.1255/ejms.1019

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Regiochemistry of N-substitution of some 4(5)-substituted imidazoles under solvent-free conditions

Autor: Helena Taberman, Pirjo Vainiotalo, Matti Haukka, Paula Aulaskari, Larisa Oresmaa

Publikováno v: Journal of Heterocyclic Chemistry. 44:1445-1451

Imidazole-4(5)-carboxaldehyde and 4(5)-cyanoimidazole were N-benzylated and N-methylated using benzyl chloride and methyl iodide on zinc oxide (ZnO), alumina, and KF/alumina under basic conditions without solvent. Triethylamine (Et3N) or potassium ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba7d9e49429e9951906bf66369c430bd
https://doi.org/10.1002/jhet.5570440632

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Electrospray ionization mass spectrometric studies of some imidazole amidoximes and nitrolic acids and their esters

Autor: Paula Aulaskari, Larisa Oresmaa, Pirjo Vainiotalo

Publikováno v: Rapid Communications in Mass Spectrometry. 20:1071-1076

The fragmentations of the [M+H]+ ions of imidazole amidoximes, and nitrolic acids and their esters, were studied by collision-induced dissociation experiments and by determining the accurate masses of the product ions on an electrospray ionization Fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbf53c802c62014cad7671094adc9482
https://doi.org/10.1002/rcm.2418

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Improved synthesis and characterization of 1,3,4,6-tetra-O-acetyl-2-(N-acetylacetamido)-2-deoxy-β-d-glucopyranose

Autor: Markku Ahlgrén, Mona Suihko, Juha Rouvinen, Paula Aulaskari

Publikováno v: Carbohydrate Research. 334:337-341

A method from the 1960s to synthesize the N , N -diacetyl derivative of peracetylated β- d -glucosamine was improved by assistance of molecular sieves. The melting point of the title compound was revised and the structure determined by means of X-ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d295f2d0fd1afa21e2a28129516996ec
https://doi.org/10.1016/s0008-6215(01)00180-x

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Preparation of 1-substituted-5-[(2-oxo-2-phenyl)ethyl]imidazoles

Autor: Paula Aulaskari, Markku Ahlgrén, Esko Pohjala, Pirjo Vainiotalo

Publikováno v: Journal of Heterocyclic Chemistry. 37:87-93

New high yield preparation methods were developed for the pharmaceutically interesting compounds, 1-benzyl-, 1-methyl-, and 1H-5-[(2-oxo-2-phenyl)ethyl]imidazoles 1a-c, respectively. The title compounds were synthesized by four different methods usin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a0d78e35f188a90daa106f7a0b19fd6
https://doi.org/10.1002/jhet.5570370114

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Synthesis of 1-Substituted-5-[(2-nitro-2-phenyl)-ethyl]imidazoles

Autor: Pirjo Vainiotalo, Paula Aulaskari, Esko Pohjala

Publikováno v: Synthetic Communications. 27:2627-2635

1-R-5-[(2-Nitro-2-phenyl)ethyl]imidazoles 9a,b,c (R = Bn, Me, H) have been prepared from the corresponding imidazole nitroethylenes 6a,b,c by the reduction with sodium borohydride in THF-methanol.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f728bd0bb7042a1539cf793a578e3f76
https://doi.org/10.1080/00397919708004132

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