Browsing by Author "Berezin, Andrey A."
Now showing items 1-20 of 26
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8-[2-Chloro-5-(trifluoromethyl)phenyl]-4H-[1,2,4]oxadiazolo-[3,4-c][1,4]benzoxazin-1-one
Berezin, Andrey A.; Koutentis, Panayiotis Andreas (2011)8-Bromo-4H-[1,2,4]oxadiazolo[3,4-c][1,4]benzoxazin-1-one 1 (NS2028) reacts with [2-chloro-5-(trifluoromethyl)phenyl]boronic acid 2 (2 equiv), Pd(OAc)2 (10 mol%) and KOAc (4 equiv) in acetonitrile heated to ca. 110 °C (sealed ...
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Article
Anti-Cancer Activity of Phenyl and Pyrid-2-yl 1,3-Substituted Benzo[1,2,4]triazin-7-ones and Stable Free Radical Precursors
Keane, Lee-Ann J.; Mirallai, Styliana I.; Sweeney, Martin; Carty, Michael P.; Zissimou, Georgia A.; Berezin, Andrey A.; Koutentis, Panayiotis A.; Aldabbagh, Fawaz (2018)Cell viability studies for benzo[1,2,4]triazin-7-ones and 1,2,4-benzotriazinyl (Blatter-type) radical precursors are described with comparisons made with 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO). All of the stable free ...
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Article
Benzotriazinyl-mediated controlled radical polymerization of styrene
Demetriou, Maria; Berezin, Andrey A.; Koutentis, Panayiotis Andreas; Krasia‐Christoforou, Theodora (2014)The stable free radical polymerization (SFRP) process based on (1,3-diphenyl-1,4-dihydro-1,2,4-benzotriazin-4-yl), the so-called 'Blatter radical', and several C-7 substituted derivatives is introduced for the first time ...
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Benzotriazinyl‐mediated controlled radical polymerization of styrene
Demetriou, Maria; Berezin, Andrey A.; Koutentis, Panayiotis Andreas; Krasia‐Christoforou, Theodora (2013)
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ChemInform Abstract: Ring Contraction of 1,3‐Diphenylbenzo1,2,4]triazinyl Radicals to 1,2‐Diphenylbenzimidazoles.
Berezin, Andrey A.; Koutentis, Panayiotis Andreas (2014)
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Article
ChemInform Abstract: Route to Benzo‐ and Pyrido‐Fused 1,2,4‐Triazinyl Radicals via N′‐(Het)aryl‐N′‐2‐nitro(het)aryl]hydrazides.
Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, Jeremy M.; Koutentis, Panayiotis Andreas (2014)
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ChemInform Abstract: Synthesis and Properties of Imidazolo‐Fused Benzotriazinyl Radicals.
Berezin, Andrey A.; Constantinides, Christos P.; Mirallai, Styliana I.; Manoli, Maria; Cao, Levy L.; Rawson, Jeremy M.; Koutentis, Panayiotis Andreas (2014)
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Design, synthesis and biological evaluation of benzo[e][1,2,4]triazin-7(1H) -one and [1,2,4]-triazino[5,6,1-jk]carbazol-6-one derivatives as dual inhibitors of beta-amyloid aggregation and acetyl/butyryl cholinesterase
Catto, M.; Berezin, Andrey A.; Lo Re, D.; Loizou, G.; Demetriades, Marina; De Stradis, A.; Campagna, F.; Koutentis, Panayiotis Andreas; Carotti, A. (2012)Alzheimer's disease (AD) onset and progression are associated with the dysregulation of multiple and complex physiological processes and a successful therapeutic approach should therefore address more than one target. Two ...
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Discovery of anti-cancer activity for benzo1,2,4]triazin-7-ones: Very strong correlation to pleurotin and thioredoxin reductase inhibition
Sweeney, Martin; Coyle, Robert; Kavanagh, Paul; Berezin, Andrey A.; Lo Re, Daniele; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Carty, Michael P.; Aldabbagh, Fawaz (2016)
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Discovery of anti-cancer activity for benzo[1,2,4]triazin-7-ones: Very strong correlation to pleurotin and thioredoxin reductase inhibition
Sweeney, M.; Coyle, R.; Kavanagh, P.; Berezin, Andrey A.; Lo Re, D.; Zissimou, Georgia A.; Koutentis, Panayiotis Andreas; Carty, Michael P.; Aldabbagh, Fawaz (2016)The thioredoxin (Trx)–thioredoxin reductase (TrxR) system plays a key role in maintaining the cellular redox balance with Trx being over-expressed in a number of cancers. Inhibition of TrxR is an important strategy for ...
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Article
Effective exchange coupling in alternating-chains of a π-extended 1,2,4-benzotriazin-4-yl
Constantinides, Christos P.; Berezin, Andrey A.; Manoli, Maria; Leitus, G. M.; Bendikov, M.; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)Air stable 1,3,7-triphenyl-1,4-dihydrothiazolo[5′,4′:4,5] benzo[1,2-e][1,2,4]triazin-4-yl packs in 1D π stacks made of radical pairs with alternate short and long interplanar distances. The magnetic susceptibility exhibits ...
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Erratum: Route to Benzo- and Pyrido-Fused 1,2,4-Triazinyl Radicals via N′-(Het)aryl-N′-[2-nitro(het)aryl]hydrazides (J. Org. Chem. (2014) 79:1 (314-327) DOI: 10.1021/jo402481t)
Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, J. M.; Koutentis, Panayiotis Andreas (2015)
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Erratum: Synthesis and properties of imidazolo-fused benzotriazinyl radicals (Organic & Biomolecular Chemistry (2013) 11 (6780-6795) DOI:10.1039/c3ob41169a)
Berezin, Andrey A.; Constantinides, Christos P.; Mirallai, Styliana I.; Manoli, Maria; Cao, Levy L.; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)
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Erratum: Tetraphenylhexaazaanthracenes: 16π Weakly Antiaromatic Species with Singlet Ground States (Org. Lett. (2015) 17 (4026-4029) DOI: 10.1021/acs.orglett.5b01923)
Constantinides, Christos P.; Zissimou, Georgia A.; Berezin, Andrey A.; Ioannou, Theodosia A.; Manoli, Maria; Tsokkou, Demetra; Theodorou, E.; Hayes, Sophia C.; Koutentis, Panayiotis Andreas (2016)
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From blatter radical to 7-substituted 1,3-diphenyl-1,4- dihydrothiazolo[5′,4′:4,5]benzo[1,2-e][1,2,4]triazin-4-yls: Toward multifunctional materials
Berezin, Andrey A.; Constantinides, Christos P.; Drouza, Chryssoula; Manoli, Maria; Koutentis, Panayiotis Andreas (2012)A Blatter radical is oxidized to benzotriazin-7(H)-one which after amination and subsequent acyl- and aroylation gives N-(benzotriazin-6-yl) carboxamides that undergo ring closure with P 2S 5 to afford the corresponding ...
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A magnetostructural investigation of an abrupt spin transition for 1-phenyl-3-trifluoromethyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl
Constantinides, Christos P.; Berezin, Andrey A.; Zissimou, Georgia A.; Manoli, Maria; Leitus, G. M.; Bendikov, M.; Probert, M. R.; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)1-Phenyl-3-trifluoromethyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl is the first example of a hydrazyl radical that shows a reversible sharp spin transition fully completed within 5(1) K. The nominally first-order transition ...
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Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenes
Savva, Anastasia C.; Mirallai, Styliana I.; Zissimou, Georgia A.; Berezin, Andrey A.; Demetriades, Marina; Kourtellaris, Andreas; Constantinides, Christos P.; Nicolaides, C.; Trypiniotis, Theodossis; Koutentis, Panayiotis Andreas (2017)Reacting N-aryliminophosphoranes with 1-(het)aroyl-2-aryldiazenes in preheated diphenyl ether at ca. 150-250 °C for 5-25 min affords in most cases the 1,3-diaryl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls (aka Blatter radicals) ...
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Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenesAAA
Savva, Anastasia C.; Mirallai, Styliana I.; Zissimou, Georgia A.; Berezin, Andrey A.; Demetriades, Marina; Kourtellaris, Andreas; Constantinides, Christos P.; Nicolaides, C.; Trypiniotis, Theodossis; Koutentis, Panayiotis Andreas (2017)Reacting N-aryliminophosphoranes with 1-(het)aroyl-2-aryldiazenes in preheated diphenyl ether at ca. 150-250 °C for 5-25 min affords in most cases the 1,3-diaryl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yls (aka Blatter radicals) ...
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Ring contraction of 1,3-diphenylbenzo[1,2,4]triazinyl radicals to 1,2-diphenylbenzimidazoles
Berezin, Andrey A.; Koutentis, Panayiotis Andreas (2014)Reductive ring contraction of 1,3-diphenyl-1,4-dihydrobenzo[e][1,2,4] triazin-4-yls (Blatter's radicals) using zinc powder (2 equiv.) in acetic acid heated to ca. 118 °C gives 1,2-diphenylbenzimidazoles in high yield. ...
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Route to benzo- and pyrido-fused 1,2,4-triazinyl radicals via N ′-(Het)aryl- N ′-[2-nitro(het)aryl]hydrazides
Berezin, Andrey A.; Zissimou, Georgia A.; Constantinides, Christos P.; Beldjoudi, Yassine; Rawson, J. M.; Koutentis, Panayiotis Andreas (2014)A two-step route to 1,3-disubstituted benzo- and pyrido-fused 1,2,4-triazinyl radicals is presented. The route involves the N′-(2-nitroarylation) of easily prepared N′-(het)arylhydrazides via nucleophilic aromatic substitution ...