Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Stanislaw Porwanski"'
Publikováno v:
Arkivoc. 2020:150-160
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd624dc42ec41311194aefcecc549314
https://doi.org/10.24820/ark.5550190.p011.340
https://doi.org/10.24820/ark.5550190.p011.340
Publikováno v:
Tetrahedron. 74:2166-2173
1,10-N,N′-bis-(β- d -ureidoglucopyranosyl)-4,7,13-trioxa-1,10-diazacyclopentadecane is a new, recently synthesized compound, which exhibits complexation ability towards drugs. In the present study various theoretical methods, including molecular m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30d4077cda0008d5ec722d51ca2e0da6
https://doi.org/10.1016/j.tet.2018.03.025
https://doi.org/10.1016/j.tet.2018.03.025
Publikováno v:
New Journal of Chemistry. 41:521-529
The article presents the results of our more extended studies performed on one of the carbohydrate derivatives of azacrown ethers that were recently synthesized in our laboratory. An attempt is made to explain the interactions between 1,10-N,N′-bis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9822ec500b85e18009412cf21a14be45
https://doi.org/10.1039/c6nj03089k
https://doi.org/10.1039/c6nj03089k
Publikováno v:
Carbohydrate Research. 417:34-40
Arylation of 6-O-tert-butyldiphenylsilyl-3,4-di-O-isobutyloxycarbonyl-d-glucal (3) with various phenols in the presence of a catalytic amount of palladium(0) gave the corresponding 2,3- and 3,4-unsaturated β-O-glycosides. The reaction is stereospeci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9c9bc453882842007ad15182de363c8
https://doi.org/10.1016/j.carres.2015.08.016
https://doi.org/10.1016/j.carres.2015.08.016
Publikováno v:
Carbohydrate Research
Carbohydrate Research, Elsevier, 2015, 414, pp.51-59. ⟨10.1016/j.carres.2015.07.007⟩
Carbohydrate Research, Elsevier, 2015, 414, pp.51-59. ⟨10.1016/j.carres.2015.07.007⟩
International audience; New cryptands including bis-azacrown and saccharidic moieties in their structure were prepared in several steps by applying Staudinger-aza-Wittig reaction (SAW). Syntheses have been started from cheap, easily available commerc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d4d00901892ddcbe0cebf57eff0daaa
https://doi.org/10.1016/j.carres.2015.07.007
https://doi.org/10.1016/j.carres.2015.07.007
Publikováno v:
Heteroatom Chemistry. 26:161-167
Two new C2 symmetric macrocycles, soluble in water, were prepared according to the one-step procedure using azacrown ethers and azidosaccharides. Their complexes with p-toluenesulfonamide were studied by proton NMR spectroscopy. The influence of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e116e9fca64501dcddc96f951b3f7163
https://doi.org/10.1002/hc.21242
https://doi.org/10.1002/hc.21242
Autor:
Stanislaw Porwanski, Agnieszka Kubiak, Izabela Szulc, Beata Olszewska, Anna Zawisza, Boguslaw Kryczka
Publikováno v:
Tetrahedron: Asymmetry. 24:212-216
Optically active 3-alkyl-3-hydroxymethyl-5-vinyltetrahydrofurans were synthesised from the corresponding methyl or isobutyl carbonates of ω,ω-bis(hydroxymethyl)-α,β-unsaturated alcohols via palladium-catalysed cyclisation. The use of chiral ligan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f303091c8bb5be3e4c6c592dda3b560f
https://doi.org/10.1016/j.tetasy.2013.01.012
https://doi.org/10.1016/j.tetasy.2013.01.012
Autor:
Alain Marsura, Stanislaw Porwanski
Publikováno v:
European Journal of Organic Chemistry. 2009:2047-2050
A templated Staudinger–aza-Wittig tandem reaction selectively affords in one step a monocellobiosyl[bis(ureido)]diazacrown cryptand and a bis(cellobiosyl)tetraureido[bis(diazacrown)] cryptand. Formation of each type of cryptand was under control by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5a6a94a4711f7dbe36e489c1f682666
https://doi.org/10.1002/ejoc.200900023
https://doi.org/10.1002/ejoc.200900023
Publikováno v:
Annales Pharmaceutiques Françaises
Annales Pharmaceutiques Françaises, Elsevier Masson, 2015, 74 (3), pp.198-204. ⟨10.1016/j.pharma.2015.11.003⟩
Annales Pharmaceutiques Françaises, Elsevier Masson, 2015, 74 (3), pp.198-204. ⟨10.1016/j.pharma.2015.11.003⟩
International audience; Cesium templated Staudinger-aza-Wittig tandem reaction (S.A.W.) has been used in the synthesis of a bis-diazacrown-bis-cellobiosyl-tetra-ureido cryptand. A novel macrotricyclic compound having a “cone-shaped” configuration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d575a957deee1288645d28d356df12bd
https://hal.univ-lorraine.fr/hal-01496001
https://hal.univ-lorraine.fr/hal-01496001
Publikováno v:
Carbohydrate research. 404
A simple synthesis of series of new catalysts derived from chiral bifunctional ureas is described. The aza-Henry reaction of imines with nitromethane was promoted by sugar derived bifunctional organocatalysts to give optically active β-nitroamines.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45edaaae50f1b1de8b7ed9afe4e8d96a
https://pubmed.ncbi.nlm.nih.gov/25665783
https://pubmed.ncbi.nlm.nih.gov/25665783