Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Karol Wolosewicz"'
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 5, Pp o1367-o1367 (2012)
In the crystal structure of the racemic title compound, C22H25NO2, solved and refined against sychrotron diffraction data, the hydroxy group and the carbonyl O atom participate in the formation of O—H...O hydrogen bonds between pairs of enantiomers
Externí odkaz:
https://doaj.org/article/b617851b432049e6b99ce29b4b02450f
Publikováno v:
European Journal of Organic Chemistry. 2019:4662-4674
Autor:
Karol Wolosewicz, Dagmara Jacewicz, Julia Siemińska, Magdalena Gorska-Ponikowska, Marcin Kołaczkowski, Joanna Drzeżdżon, Ryszard Łaźny, Alicja Kuban-Jankowska, Tomasz Kostrzewa, Marek Jamrozik
Publikováno v:
International Journal of Molecular Sciences
Volume 22
Issue 19
International Journal of Molecular Sciences, Vol 22, Iss 10368, p 10368 (2021)
Volume 22
Issue 19
International Journal of Molecular Sciences, Vol 22, Iss 10368, p 10368 (2021)
Breast cancer is the most common cancer of women—it affects more than 2 million women worldwide. PTP1B phosphatase can be one of the possible targets for new drugs in breast cancer therapy. In this paper, we present new curcumin derivatives featuri
Publikováno v:
European Journal of Organic Chemistry. 2016:2212-2219
Catalytic enantioselective Kinugasa reactions between acyclic and, for the first time, cyclic nitrones and terminal alkynes are described herein. A catalytic amount of the readily available PINAP/CuX complexes, generated in situ, efficiently catalyze
Autor:
Ryszard Lazny, Przemysław Kalicki, Katarzyna Sidorowicz, Karol Wolosewicz, Zofia Urbańczyk-Lipkowska, Artur Ratkiewicz, Aneta Nodzewska
Publikováno v:
Tetrahedron. 71:5148-5158
Isomerisation of α-alkyl (Me, n-Pr, i-Pr, Bn) N,N-dimethylhydrazone derivatives of 8-methyl-8-azabicyclo-[3.2.1]octane (tropane) gave two isomers (E,exo Z,exo) while of 9-azabicyclo[3.3.1]nonane (granatane) three isomers (E,exo Z,exo and E,endo), ex
Autor:
Michał Pieczykolan, Kamil Kabala, Sebastian Stecko, Marek Chmielewski, Bartłomiej Furman, Karol Wolosewicz, Magdalena Maciejko, Artur Ulikowski, Margarita Jurczak, Barbara Grzeszczyk
Publikováno v:
Scopus-Elsevier
Publikováno v:
Tetrahedron. 70:597-607
Tropinone (8-methyl-8-azabicyclo[3.2.1]octan-3-one) metal (Li, Na, K, Mg) enolates were used to achieve α-alkylation. The reactions, regardless of the metal or conditions used, were low-yielding. N , N -Dimethylhydrazones of tropinone and granatanon
Autor:
Ryszard Lazny, Karol Wolosewicz
Publikováno v:
Tetrahedron Letters. 54:1103-1106
Amine-free lithium enolates can be prepared by a simple procedure using polymer-immobilized lithium amides derived from known, easily accessible immobilized secondary amines, or from a new bidentate amine [lithium diisopropylamide (LDA) or lithium cy
Autor:
Zofia Urbańczyk-Lipkowska, Karol Wolosewicz, Przemysław Kalicki, Paulina Zielinska, Ryszard Lazny
Publikováno v:
Tetrahedron. 67:9433-9439
Granatanone (granatan-3-one, 9-methyl-9-azabicyclo[3.3.1]nonan-3-one, pseudopelletierine or pseudopelletrierin) undergoes deprotonation with lithium amides giving a lithium enolate, which reacts with aldehydes diastereoselectively giving exclusively
Publikováno v:
Journal of Combinatorial Chemistry. 7:109-116
A new approach to polymeric supports useful for the immobilization of aldehydes and ketones via hydrazone linkers is reported. The new strategy gives supports with better properties and is effective for the synthesis of all supports previously used f