Browsing by Subject "Organic compounds"
Now showing items 1-20 of 24
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Article
Analysis of volatile organic compounds released from the decay of surrogate human models simulating victims of collapsed buildings by thermal desorption-comprehensive two-dimensional gas chromatography-time of flight mass spectrometry
(2015)Field experiments were devised to mimic the entrapment conditions under the rubble of collapsed buildings aiming to investigate the evolution of volatile organic compounds (VOCs) during the early dead body decomposition ...
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A cleavable network based on crosslinked star polymers containing acid-labile diacetal crosslinks: Synthesis, characterization and hydrolysis
(2008)A hydrolyzable model network comprising interconnected star polymers was prepared by the sequential group transfer polymerization of methyl methacrylate and the acid-labile diacetalbased dimethacrylate crosslinker ...
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Article
The Conversion of 4-Anilinoquinazoline- and 3-Aryl-4-imino-3,4-dihydro-quinazoline-2-carbonitriles into Benzo[4,5]imidazo[1,2-c]quinazoline-6-carbonitriles via Oxidative and Nonoxidative C-N Couplings
(2015)Benzo[4,5]imidazo[1,2-c]quinazoline-6-carbonitriles are prepared in high yields via three new routes: (1) a Cu(OTf)2 (0-5 mol %) catalyzed hypervalent iodine [PhI(OTf)2] mediated oxidative coupling of 4-anilinoquinazolin ...
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Article
The conversion of [(4-chloro-5H-1,2,3-dithiazol-5-ylidene)amino]azines into azine fused thiazole-2-carbonitriles
(2013)The thermolysis of several N-(4-chloro-5H-1,2,3-dithiazol-5-ylidene) pyridin-n-amines (where n = 2, 3 and 4) gives a mixture of thiazolopyridine-2- carbonitriles in low to moderate yields. Introduction, by design, of a ...
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Diol-type ligands as central 'players' in the chemistry of high-spin molecules and single-molecule magnets
(2008)The combination of diol-type ligands with paramagnetic transition metal ions has led to the isolation of a host of new homometallic and heterometallic clusters, high-spin molecules and single molecule magnets ranging in ...
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Article
The elusive benzocyclobutenylidene: A combined computational and experimental attempt
(2001)Ab initio and density functional theory calculations predict that benzocyclobutenylidene (1) has a singlet ground state in contrast to the parent phenylcarbene and many other simply substituted arylcarbenes. Calculations ...
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Article
Halogen derivatives of m-phenylene(carbeno)nitrene: A switch in ground-state multiplicity
(2002)m-Phenylene-coupled carbenonitrenes [(3-nitrenophenyl)methylene (2-H), (3-nitrenophenyl)fluoromethylene (2-F), (3-nitrenophenyl)chloromethylene (2-Cl), (3-nitrenophenyl)bromomethylene (2-Br)] have been investigated ...
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Doctoral Thesis Open Access
New chemistry of 1,2,3-dithiazoles
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2012-01)Το ενδιαφέρον μας στη χημεία των 1,2,3-διθειαζολών προκύπτει από το γεγονός ότι τα διθειαζολικά συστήματα μπορούν να χρησιμοποιηθούν στην προετοιμασία νέων ετεροκυκλικών συστημάτων με σημαντικές βιολογικές ιδιότητες. Ένας ...
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Doctoral Thesis Open Access
New chemistry of isothiazoles and 1,2,3-dithiazoles
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2008-05)Μετά τη σύντομη εισαγωγή (Κεφάλαιο 1) περί ισοθειαζολών, ακολουθεί περιγραφή νέας χημείας των 1,2,3-διθειαζολών στα Κεφάλαια 2 και 3. Συντίθενται τα υποκατεστημένα 1,2,3-διθειαζολυλίδενο ακετονιτρίλια 129, 139 και 142 και ...
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Doctoral Thesis Open Access
New chemistry of isothiazoles and 1,2,6-thiadiazines
(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
New regiospecific isothiazole C-C coupling chemistry
(2006)Regioselective palladium catalysed coupling reactions are achieved in good to high yields, starting from either 3,5-dichloro- or 3,5-dibromoisothiazole-4-carbonitriles 1 and 2, providing 3-halo-5-(hetero/aryl, alkenyl and ...
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Doctoral Thesis Open Access
New ring transformations of 1,2,3-dithiazoles
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2017-01)Ο αρχικός στόχος της παρούσας Διατριβής ήταν η διερεύνηση της αντίδρασης μετασχηματισμού Ν-αζινυλ-1,2,3-διθειαζολιμινών προς αζινο-θειαζόλες. Μελέτη της αντίδρασης αυτής οδήγησε στην ανάπτυξη μιας νέας και αποδοτικής ...
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Article
Perchlorophenalenyl radical
(2001)We report the preparation and solid-state characterization of the perchlorophenalenyl radical (1). The radical is initially obtained as a yellow-green solid by reduction of the perchlorophenalenium salt (12+). This solid ...
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Article
Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenes
(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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Article
Preparation of Blatter Radicals via Aza-Wittig Chemistry: The Reaction of N-Aryliminophosphoranes with 1-(Het)aroyl-2-aryldiazenesAAA
(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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Article
Reaction of Herz salts with malononitrile: A general route to (6H-1,2,3-benzodithiazol-6-ylidene)malononitriles
(2002)6-Chloro-1,2,3-benzodithiazolium chlorides 1 (Herz salts) react with malononitrile to afford the highly coloured ylidenes 2 in low to moderate yields. The reaction is general but complex and in the case of the 6-chloro-4 ...
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Article
Reactions of tetracyanoethylene with N′-arylbenzamidines: A route to 2-phenyl-3 H -imidazo[4,5- b ]quinoline-9-carbonitriles
(2013)Eight 2-phenyl-3H-imidazo[4,5-b]quinoline-9-carbonitriles 15 are prepared in four steps from N′-arylbenzamidines 11 and tetracyanoethylene (TCNE) in ∼70-90% yields. The transformation involves the initial formation of ...
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Article
Regiospecific Suzuki coupling of 3,5-dichloroisothiazole-4-carbonitrile
(2003)3,5-Dichloroisothiazole-4-carbonitrile 1 reacts with aryl- and methylboronic acids to give in high yields the 3-chloro-5-(aryl and methyl)-isothiazole-4-carbonitrile 2 regiospecifically. The reaction was optimized with ...
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Article
Route to benzo- and pyrido-fused 1,2,4-triazinyl radicals via N ′-(Het)aryl- N ′-[2-nitro(het)aryl]hydrazides
(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 ...