Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Michał Barbasiewicz"'
Publikováno v:
Molecules, Vol 28, Iss 10, p 4015 (2023)
The aim of this essay is to disclose the similarity of a great variety of reactions that proceed between nucleophiles and π-electrophiles—both aromatic and aliphatic. These reactions proceed via initial reversible addition, followed by a variety o
Externí odkaz:
https://doaj.org/article/df94db8189bd4131a7f4f8c0d5b544e2
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 14, Iss 1, Pp 2354-2365 (2018)
Two routes to the title compounds are evaluated. First, a ca. 0.01 M CH2Cl2 solution of H3B·P((CH2)6CH=CH2)3 (1·BH3) is treated with 5 mol % of Grubbs' first generation catalyst (0 °C to reflux), followed by H2 (5 bar) and Wilkinson's catalyst (55
Externí odkaz:
https://doaj.org/article/3cc21e18fd65498ea18d346c5a890e2b
Autor:
Michał Barbasiewicz, Damian Antoniak
Publikováno v:
Synlett. 34:101-105
Electrophilic and nucleophilic substitutions of aromatic substrates share common mechanistic pathways. In both scenarios reacting species attack rings at the unsubstituted (C–H) positions, giving cationic Wheland intermediates or anionic Meisenheim
Publikováno v:
Organic Letters. 24:4270-4274
Methanedisulfonyl fluoride, CH
Autor:
Damian Antoniak, Michał Barbasiewicz
Publikováno v:
Organic Letters
Electrophilic nitropyridines react with sulfonyl-stabilized carbanions to give products of C–H alkylation via vicarious nucleophilic substitution. The process consists of formation of the Meisenheimer-type adduct followed by base-induced β-elimina
Publikováno v:
Synthesis. 54:1446-1460
A series of acyl fluorides was synthesized at 100 mmol scale using phase-transfer-catalyzed halogen exchange between acyl chlorides and aqueous bifluoride solution. The convenient procedure consists of vigorous stirring of the biphasic mixture at roo
Publikováno v:
Chemistry – A European Journal. 28
Alkylation of nitroarenes via Vicarious Nucleophilic Substitution (VNS) was tested experimentally and modelled with DFT calculations. Mechanistic studies reveal intrinsic differences between reactions of archetypal carbanion precursor PhSO
Autor:
Michał Barbasiewicz, Dariusz Basiak
Publikováno v:
Arkivoc. 2021:118-135
Autor:
Michał Barbasiewicz, Mateusz Urban, Sergiusz Luliński, Krzysztof Durka, Krzysztof Woźniak, Krzysztof Błocki, Bartosz Górski
Publikováno v:
The Journal of Physical Chemistry A. 123:8674-8689
A series of five bis(salicylaldehydes), including four isomeric compounds based on a benzene scaffold and a closely related naphthalene derivative, were investigated in order to elucidate the impact of resonance effects and intramolecular hydrogen bo
Publikováno v:
Synthesis. 51:2278-2286
Studies on directed ortho-metalation (DoM) of arenesulfonyl fluorides (ArSO2F) with in situ electrophile trapping are presented. Under optimized conditions (LDA, THF, –78 °C), a series of model substrates was mono- and difunctionalized with trimet