Browsing by Author "Koutentis, Panayiotis Andreas"
Now showing items 1-20 of 161
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Article
1,2,3-Dithiazole chemistry in heterocyclic synthesis
Christoforou, Irene C.; Koutentis, Panayiotis Andreas; Michaelidou, Sophia S. (2006)The chemistry of various 5H-1,2,3-dithiazoles is investigated with emphasis on assisted ring opening and ring closure reactions leading to new heterocycles. Thus on treatment with catalytic tetraalkylammonium iodide ...
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Article
1,2,3-Dithiazoles – new reversible melanin synthesis inhibitors: a chemical genomics study
Charalambous, Anna; Koyioni, Maria G.; Antoniades, Ioanna A.; Pegeioti, Despoina; Eleftheriou, Iro; Michaelidou, Sophia S.; Amelichev, Stanislav A.; Konstantinova, Lidia S.; Rakitin, Oleg A.; Koutentis, Panayiotis Andreas; Skourides, Paris A. (2015)
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Article
1,2,3-Dithiazoles-new reversible melanin synthesis inhibitors: A chemical genomics study
Charalambous, Anna; Koyioni, Maria; Antoniades, Ioanna; Pegeioti, Despoina; Eleftheriou, Iro; Michaelidou, Sophia S.; Amelichev, Stanislav A.; Konstantinova, L. S.; Rakitin, O. A.; Koutentis, Panayiotis Andreas; Skourides, Paris A. (2015)A chemical genomic screen of an in-house library of small molecule heterocycles was carried out using Xenopus laevis embryos. This led to the identification of N-(4-chloro-5H-1,2,3-dithiazol-5-ylidene)-4-methoxyaniline ...
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Book Chapter
1,2,5-Thiadiazoles
Koutentis, Panayiotis Andreas (Elsevier Ltd., 2008)
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Book Chapter
1,3,4-Thiadiazoles
Koutentis, Panayiotis Andreas; Constantinides, Christos P. (Elsevier Ltd., 2008)
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Article
1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-one: Selected chemistry at the C-6, C-7 and C-8 positions
Koutentis, Panayiotis Andreas; Krassos, H.; Lo Re, D. (2011)1,3-Diphenylbenzo[e][1,2,4]triazin-7(1H)-one (6) reacts with tetracyanoethylene (TCNE) or tetracyanoethylene oxide (TCNEO) to give the deep green 2-[1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-ylidene]propanedinitrile (11) ...
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Article
2-(2,3,4,5,6-Pentafluorophenyl)-1H-benzo[d]imidazole, a fluorine-rich building block for the preparation of conjugated polymer donors for organic solar cell applications
Neophytou, Marios; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Chochos, Christos L.; Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Itskos, Grigorios; Choulis, Stelios A. (2012)We have introduced the pentafluorophenyl substituted benzimidazole as a building block of conjugated polymers for optoelectronic applications. We present the synthesis of a copolymer bearing fluorene as the comonomer. A ...
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Article
3,4,5,6,7,8,9-heptachlorophenaleno[1,9-bc]pyrazole
Demetriadou, Polina K.; Koutentis, Panayiotis Andreas (2009)Treatment of perchloro-7H-cyclopropano[a]acenaphthylene 1 with hydrazine hydrate in DMF at ca. 80 °C gives the new 3,4,5,6,7,8,9-heptachlorophenaleno[1,9-bc]pyrazole 2 in 69% yield. This compound is the first example of a ...
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Article
3,4,5-Triarylisothiazoles via C-C coupling chemistry
Christoforou, Irene C.; Koutentis, Panayiotis Andreas (2007)The regiocontrolled preparation of triarylisothiazoles is presented. 3-Halo-5-phenylisothiazole-4-carbonitriles, 1 (hal = Cl) and 18 (hal = I), are converted into the corresponding 4-bromo derivatives 5 (3-hal = Cl) and ...
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Article
3,5-bis(4-dodecylthiophen-2-yl)-4H-1,2,6-thiadiazin-4-one
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2012)3,5-Dichloro-4H-1,2,6-thiadiazin-4-one 1 reacts with (4-dodecylthiophen-2-yl)trimethylstannane 4 (2.2 equiv.) and Pd(Ph 3P) 2Cl 2 (5 mol%) in acetonitrile at ca. 82 °C to give 3,5-bis(4-dodecylthiophen-2-yl)-4H-1,2,6-thi ...
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Article
3-amino-6-ethoxy-4-phenyl-1H-pyrrolo[2,3-b]pyridine-2,5-dicarbonitrile
Koutentis, Panayiotis Andreas; Michaelidou, Sophia S. (2010)(Z)-2-(4-Chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine- 3,5-dicarbonitrile 1, when treated with either triphenylphosphine (4 equiv.) or polymer bound triphenylphosphine (5 equiv.) in dichloromethane ...
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Article
3-Chloro-5-(4-dodecylthiophen-2-yl)-4H-1,2,6-thiadiazin-4-one
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2012)3-Chloro-5-trifluoromethanesulfonate-4H-1,2,6-thiadiazin-4-one 3 reacts with (4-dodecylthiophen-2-yl)trimethylstannane 5 (1 equiv.) in the presence of Pd(Ph 3P) 2Cl 2 (5 mol%) in benzene at ca. 20 °C for 5 h to give ...
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Article
4-chloro-6-ethoxy-2-(Methylthio)pyrimidine
Kalogirou, Andreas S.; Koutentis, Panayiotis Andreas (2017)4,6-Dichloro-2-(methylthio) pyrimidine (3) reacts with EtONa in EtOH, at ca. 20 °C, for 2 h, to give exclusively 4-chloro-6-ethoxy-2-(methylthio)pyrimidine (5) in 89% yield. The latter is presented as a useful multifunctionalised ...
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Article
4H-1,2,6-Thiadiazin-4-one-containing small molecule donors and additive effects on their performance in solution-processed organic solar cells
Hermerschmidt, F.; Kalogirou, Andreas S.; Min, J.; Zissimou, Georgia A.; Tuladhar, S. M.; Ameri, T.; Faber, H.; Itskos, Grigorios; Choulis, Stelios A.; Anthopoulos, T. D.; Bradley, D. D. C.; Nelson, J.; Brabec, C. J.; Koutentis, Panayiotis Andreas (2015)The optical, electrochemical, morphological and transport properties of a series of thiadiazinone (acceptor) and (thienyl)carbazoles (donor) containing π-extended donor-acceptor-donors (D-A-D) are presented. Systematic ...
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Article
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
A novel QSPR model for predicting θ (lower critical solution temperature) in polymer solutions using molecular descriptors
Melagraki, G.; Afantitis, Antreas; Sarimveis, H.; Koutentis, Panayiotis Andreas; Markopoulos, J.; Igglessi-Markopoulou, O. (2007)In this study, we present a new model that has been developed for the prediction of θ, (lower critical solution temperature) using a database of 169 data points that include 12 polymers and 67 solvents. For the characterization ...
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Article
The Acid and/or Thermal Mediated Ring Contraction of 4H-1,2,6-Thiadiazines to Afford 1,2,5-Thiadiazoles
Kalogirou, Andreas S.; Kourtellaris, Andreas; Koutentis, Panayiotis Andreas (2016)A near-quantitative acid and/or thermal mediated ring contraction of 3′,5′-diarylspiro(benzo[d][1,3]dioxole-2,4′-[1,2,6]thiadiazines) affords 3-aryl-4-(2-arylbenzo[d][1,3]dioxol-2-yl)-1,2,5-thiadiazoles. The reaction scope ...
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Article
Antiferromagnetic interactions in 1D Heisenberg linear chains of 7-(4-fluorophenyl) and 7-phenyl-substituted 1,3-diphenyl-1,4-dihydro- 1,2,4-benzotriazin-4-yl radicals
Constantinides, Christos P.; Koutentis, Panayiotis Andreas; Rawson, J. M. (2012)7-(4-Fluorophenyl) and 7-phenyl-substituted 1,3-diphenyl-1,4-dihydro-1,2,4- benzotriazin-4-yl radicals were characterized by X-ray diffraction analysis and variable-temperature magnetic susceptibility studies. The radicals ...
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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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Article
Benzotriazinyl‐mediated controlled radical polymerization of styrene
Demetriou, Maria; Berezin, Andrey A.; Koutentis, Panayiotis Andreas; Krasia‐Christoforou, Theodora (2013)