Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Dorota Czajkowska-Szczykowska"'
Autor:
Aneta M. Tomkiel, Dorota Czajkowska-Szczykowska, Ewa Olchowik-Grabarek, Lucie Rárová, Szymon Sękowski, Jacek W. Morzycki
Publikováno v:
Molecules, Vol 28, Iss 1, p 189 (2022)
A chemoselective procedure for MCPBA oxidation of 26-thiodiosgenin to corresponding sulfoxides and sulfone was elaborated. An unusual equilibration of sulfoxides in solution was observed. Moreover, α-alkylation of sulfoxide and sulfone was investiga
Externí odkaz:
https://doaj.org/article/0bb294829429486689e2c90a20f2df42
Autor:
Dorota Czajkowska-Szczykowska, Ewa Olchowik-Grabarek, Szymon Sękowski, Jacek Żarkowski, Jacek W. Morzycki
Publikováno v:
The Journal of steroid biochemistry and molecular biology. 224
A four-step synthesis of five- and six-membered E/F ring spiroethers from tigogenin has been developed. An efficient strategy that features bis-Grignard reaction of dinorcholanic lactone with appropriate bis(bromomagnesio)alkanes followed by acid-med
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8d73b8263a1b7ff8dd34f51fca40d18
https://pubmed.ncbi.nlm.nih.gov/36055516
https://pubmed.ncbi.nlm.nih.gov/36055516
Autor:
Paweł Małecki, Karol Grela, Anna Kajetanowicz, Jolanta Pawłowska, Tomasz Nienałtowski, Dorota Czajkowska-Szczykowska, Stefan J. Czarnocki, Paweł Szczepanik
Publikováno v:
Chemistry – A European Journal. 26:15708-15717
A large-scale synthesis of known Ru olefin metathesis catalyst VII featuring an unsymmetrical N-heterocyclic carbene (NHC) ligand with one 2,5-diisopropylphenyl (DIPP) and one thiophenylmethylene N-substituent is reported. The optimised procedure doe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e15a8d40fe5789b5a9849893e25c08cd
https://doi.org/10.1002/chem.202003830
https://doi.org/10.1002/chem.202003830
Autor:
Jadwiga Maj, Dorota Czajkowska-Szczykowska, Grzegorz Bujacz, Jacek W. Morzycki, Tomasz Pawlak, Norberto Farfán, Barbara Seroka, Izabella Jastrzebska, Rosa Santillan, Pablo Labra-Vázquez, Marek J. Potrzebowski
Publikováno v:
Crystal Growth & Design. 20:2202-2216
Two, acyclic (1) and cyclic (2), steroidal molecular rotors containing 1,4-diethynyl-2,3-difluoro-phenylene units as rotators were investigated by means of single crystal X-ray diffraction, high re...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fa831c9ca871094ba46dccac5c43430
https://doi.org/10.1021/acs.cgd.9b01179
https://doi.org/10.1021/acs.cgd.9b01179
Publikováno v:
Journal of natural products. 82(1)
The steroidal alkaloid solasodine (1) undergoes inversion of configuration at the C-22 spiro atom when treated with acetic anhydride-pyridine at ambient temperature. The basic solvolysis of the N, O-diacetyl derivative (2) reverses the reaction, yiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6374e32f9dc81be05aa91d9b1d393b36
https://pubmed.ncbi.nlm.nih.gov/30614239
https://pubmed.ncbi.nlm.nih.gov/30614239
Autor:
Jadwiga Maj, Rafael Arcos-Ramos, Jacek W. Morzycki, Norberto Farfán, Dorota Czajkowska-Szczykowska, Marek J. Potrzebowski, Edwin Flórez-López, Rosa Santillan, Izabella Jastrzebska, Tomasz Pawlak
Publikováno v:
Crystal Growth & Design. 16:5698-5709
The synthesis and solid-state characterization of a series of cyclic/acyclic molecular rotors derived from naturally occurring steroidal 12-oxosapogenins are described. The bridged molecular rotors with rigid steroidal frameworks were obtained by emp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d8384f97970d5488e1bb587e282ee77
https://doi.org/10.1021/acs.cgd.6b00726
https://doi.org/10.1021/acs.cgd.6b00726
Autor:
Andrés Aguilar-Granda, Jacek W. Morzycki, Braulio Rodríguez-Molina, Rosa Santillan, Miguel A. Garcia-Garibay, Agnieszka Z. Wilczewska, Stanisław Witkowski, Dorota Czajkowska-Szczykowska, Jadwiga Maj
Publikováno v:
Crystal Growth & Design. 16:1599-1605
We describe the synthesis and crystallization of two macrocyclic steroidal compounds labeled (Z)-1F2 and (E)-1F2, envisioned to work as molecular rotors with 1,4-diethynyl-2,3-difluorophenylene rotators. The introduction of the fluorine atoms rendere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4da1a193f75e2447f7abfe3a30b80a7c
https://doi.org/10.1021/acs.cgd.5b01705
https://doi.org/10.1021/acs.cgd.5b01705
Publikováno v:
Tetrahedron. 70:9427-9435
The syntheses of four macrocyclic molecular rotors are described. The starting oxosteroids, 5β-androsterone, and 23-oxosarsasapogenin, were subjected to Grignard ethynylation followed by Sonogashira coupling with 1,4-diiodobenzene. The obtained acyc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df828109041e902b6fdb4ea9439a7825
https://doi.org/10.1016/j.tet.2014.10.022
https://doi.org/10.1016/j.tet.2014.10.022
Autor:
Dorota Czajkowska-Szczykowska, Zofia Urbanczyk‐Lipkowska, Jacek W. Morzycki, Agnieszka Hryniewicka, Stanisław Witkowski, Iwona Misztalewska
Publikováno v:
Tetrahedron. 70:6810-6816
Synthesis of new type of the Hoveyda–Grubbs catalysts containing modified N-heterocyclic carbene ligands is described herein. New catalysts bear different in size polyether clamp embracing N,N′-2,4-dimethylphenyl substituents in N-heterocyclic ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f734dc8546575d17dd642e6c7d28ad7d
https://doi.org/10.1016/j.tet.2014.07.056
https://doi.org/10.1016/j.tet.2014.07.056
Autor:
Braulio Rodríguez-Molina, Dorota Czajkowska-Szczykowska, Jacek W. Morzycki, Rosa Santillan, Miguel A. Garcia-Garibay, Nancy E. Magaña-Vergara
Publikováno v:
The Journal of Organic Chemistry. 77:9970-9978
In this work, we describe the synthesis and solid-state dynamics of isomeric molecular rotors 7E and 7Z, consisting of two androstane steroidal frameworks linked by the D rings by triple bonds at their C17 positions to a 1,4-phenylene rotator. They a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::484f9745341298052180f89b905bc344
https://doi.org/10.1021/jo3020402
https://doi.org/10.1021/jo3020402