Browsing by Author "Ioannidou, Heraklidia A."
Now showing items 1-20 of 21
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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
3,5-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-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
ChemInform Abstract: Synthesis of Asymmetric 3,5‐Diaryl‐4H‐1,2,6‐thiadiazin‐4‐ones via Suzuki—Miyaura and Stille Coupling Reactions.
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2013)
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Article
The conversion of isothiazoles into pyrazoles using hydrazine
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2009)The conversion of isothiazoles into pyrazoles on treatment with hydrazine is investigated. The influence of various C-3, C-4 and C-5 isothiazole substituents and some limitations of this ring transformation are examined. ...
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Article
Erratum: Three-Step Synthesis of Ethyl Canthinone-3-carboxylates from Ethyl 4-Bromo-6-methoxy-1,5-naphthyridine-3-carboxylate via a Pd-Catalyzed Suzuki-Miyaura Coupling and a Cu-Catalyzed Amidation Reaction (J. Org. Chem. (2011) 76:12 (5113-5122) DOI: 10.1021/jo200824b)
Ioannidou, Heraklidia A.; Martin, A.; Gollner, A.; Koutentis, Panayiotis Andreas (2015)
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Article
Identifying potential candidates for donor-acceptor copolymers on a series of 4H-1,2,6-thiadiazines: An electrochemical approach
Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Ioannidou, Heraklidia A.; Choulis, Stelios A. (2013)A series of synthesized small organic molecules based on the 4H-1,2,6-thiadiazine moiety are studied using electrochemistry, to probe their potential as comonomer building blocks for solar-absorbing polymers for organic ...
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Doctoral Thesis Open Access
New chemistry of isothiazoles and 1,2,6-thiadiazines
Ioannidou, Heraklidia A. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2011-12)Η διατριβή ξεκινά με μια σύντομη περίληψη αναφορικά με την ετεροκυκλική χημεία καθάκ και τη γνωστή χημεία για τις ιοοθειαζόλες και τις 1,2,6-θειαδιαζίνες. Στη συνέχεια το κύριο μέρος χωρίζεται σε 3 μέρη. Το πρώτο μέρος ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Novel BODIPY-based conjugated polymers donors for organic photovoltaic applications
Economopoulos, Solon P.; Chochos, Christos L.; Ioannidou, Heraklidia A.; Neophytou, Marios; Charilaou, C.; Zissimou, Georgia A.; Frost, J. M.; Sachetan, T.; Shahid, M.; Nelson, J.; Heeney, M.; Bradley, D. D. C.; Itskos, Grigorios; Koutentis, Panayiotis Andreas; Choulis, Stelios A. (2013)Five new polymers based on the 4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene core (BODIPY) chromophore moiety have been synthesized as low bandgap polymers for optoelectronic applications. The polymers exhibited high solubility ...
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Article
Palladium catalyzed C-C coupling reactions of 3,5-dichloro-4 H -1,2,6-thiadiazin-4-one
Ioannidou, Heraklidia A.; Kizas, Christos M.; Koutentis, Panayiotis Andreas (2011)Palladium catalyzed Suzuki-Miyaura, Stille, and Sonogashira coupling reactions are reported for the electron-deficient heterocyclic scaffold 3,5-dichloro-4H-1,2,6-thiadiazin-4-one (1). Furthermore, 3,5-di(thien-2-yl)-4H- ...
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Article
Regioselective hydrodehalogenation of 3,5-dihaloisothiazole-4- carbonitriles: Synthesis of 3-haloisothiazole-4-carbonitriles
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2011)3,5-Dibromoisothiazole-4-carbonitrile 1 treated with Zn or In dust (5 equiv) and HCO2H undergoes regioselective hydrodebromination to give 3-bromoisothiazole-4-carbonitrile 3 in 70-74% yield. Similarly, 5-bromo and iodo ...
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Article
Ring transformation of (4-chloro-5H-1,2,3-dithiazol-5-ylidene)acetonitriles to 3-haloisothiazole-5-carbonitriles
Kalogirou, Andreas S.; Christoforou, Irene C.; Ioannidou, Heraklidia A.; Manos, Manolis J.; Koutentis, Panayiotis Andreas (2014)Ring transformation of readily prepared (4-chloro-5H-1,2,3-dithiazol-5- ylidene)acetonitriles afford 3-haloisothiazole-5-carbonitriles in good to excellent yields. The transformation can be mediated using HBr (g), HCl (g) ...
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Article
Selective stille coupling reactions of 3-chloro-5-halo(pseudohalo)-4 H -1,2,6-thiadiazin-4-ones
Ioannidou, Heraklidia A.; Kizas, Christos M.; Koutentis, Panayiotis Andreas (2011)A series of 3-chloro-5-halo(pseudohalo)-4H-1,2,6-thiadiazin-4-ones (halo/pseudohalo = Br, I, OTf) are prepared from 3,5-dichloro-4H-1,2,6- thiadiazin-4-one (3) in good yields. Of these the triflate reacts with tributyltin ...
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Article
Silver-mediated palladium-catalyzed direct C-H arylation of 3-bromoisothiazole-4-carbonitrile
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2011)Silver(I) fluoride-mediated Pd-catalyzed C-H direct arylation/ heteroarylation of 3-bromoisothiazole-4-carbonitrile (1a) gives twenty-four 5-aryl/heteroaryl-3-bromoisothiazole-4-carbonitriles. The reaction was partially ...
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Article
Spectroscopic characterization of C-4 substituted 3,5-dichloro-4H-1,2,6-thiadiazines
Theodorou, E.; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Kalogirou, Andreas S.; Constantinides, Christos P.; Manoli, Maria; Koutentis, Panayiotis Andreas; Hayes, Sophia C. (2015)Three 3,5-dichloro-4H-1,2,6-thiadiazines, which differ according to the electron withdrawing nature of their substituent at C-4: (a) 3,5-dichloro-4-methylene-4H-1,2,6-thiadiazine (5a), (b) 3,5-dichloro-4H-1,2,6-thiadiazin-4-one ...
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Article
Spectroscopic characterization of C-4 substituted 3,5-dichloro-4H-1,2,6-thiadiazines1
Theodorou, Eleni; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Kalogirou, Andreas S.; Constantinides, Christos P.; Manoli, Maria; Koutentis, Panayiotis Andreas; Hayes, Sophia C. (2015)
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Article
Substitution at C-4 in 3,5-disubstituted 4H-1,2,6-thiadiazin-4-ones
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2012)3,5-Diaryl-4H-1,2,6-thiadiazin-4-ones react with NaBH 4 to give the 3,5-diaryl-4H-1,2,6-thiadiazin-4-ols and with MeLi to give 4-methyl-3,5-diaryl-4H-1,2,6-thiadiazin-4-ols. The latter dehydrate with p-toluenesulfonic acid ...
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Article
Synthesis of asymmetric 3,5-diaryl-4H-1,2,6-thiadiazin-4-ones via Suzuki-Miyaura and Stille coupling reactions
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2012)Asymmetric 3,5-diaryl substituted 4H-1,2,6-thiadiazin-4-ones can be prepared from 3,5-dichloro-4H-1,2,6-thiadiazin-4-one (1) via a multi-step protocol: selective nucleophilic mono-chloro substitution gives either the ...
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Article
Tert-Butyl 3-(4-Cyano-5-phenylisothiazol-3-yl)carbazate
Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2009)3-Iodo-5-phenylisothiazole-4-carbonitrile 1 reacts with tert-butyl carbazate via a Buchwald C-N style coupling to afford tert-butyl 3-(4-cyano-5-phenylisothiazol-3-yl)-carbazate 2 in 70% yield. © 2009 by the authors.