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    Design, synthesis and spectral characterization of cyclotriphosphazenes including heterocyclic rings
    (Elsevier, 2025) Begec, Saliha
    In this study, described the synthesis on a cyclotriphosphazene containing the spirocyclic 2,2 '-dioxybiphenyl group and 2-mercapto-1-methylimidazole (methimazole) or 2-mercaptothiazoline (MTZ) moieties. These spiro(in difunctional ligands, both ends are bound to the same phosphorus) cyclotriphosphazene derivatives (6, 7a) were synthesized in two steps. In first step; mono substituted phosphazene compounds 2,4,4,6,6-pentachloro-2-(2mercapto-1-methylimidazolyl) cyclo2A5, 4A5, 6A5, triphosphazatriene; N4P3Cl5C3S2H5 (4), and 2,4,4,6,6-pentachloro-2-(2-mercapto-tiyazolinyl) cyclo2A5, 4A5, 6A5, triphosphazatriene; N4P3Cl5C4S2H4 (5)] were prepared from the reaction of hexachlorocyclotriphosphazatriene (trimer, N3P3Cl6, 1), with methimazole (2) or MTZ (3) in tetrahydrofurane (THF) in the presence of metallic sodium under an argon atmosphere. In second step; monospiro2-mercaptothiazolinyl (7a) and dispiro2-mercapto-1-methylimidazolyl s & uuml;bstituted (6) phosphazene derivatives were obtained from the reactions of 4 and 5 with 2,2 '-dihydroxybiphenyl (8) in acetone in the presence of potassium carbonate (K2CO3). Structural characterizations of all obtained compounds were made using by elemental analysis, FT-IR, 1H, 13C and 31P NMR spectroscopies. Compounds 5-7a are reported for the first time in this study.
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    Phenolysis of 2, 2?-Biphenoxy Thiophosphinic Chloride: Crystal Structures and DFT Calculations of 2, 2?-Biphenyl 4-Tert-Butylphenyl Thiophosphinate and 2, 2?-Biphenyl 3,4-di-Methylphenyl Thiophosphinate
    (Taylor & Francis Ltd, 2023) Begec, Saliha; Yuksel, Fatma; Chumakov, Yurii; Alatas, Sümeyya; Kilic, Adem
    In this work, firstly, thiophosphoryl chloride, PSCl3 (1), with 2,2'-dihydroxybiphenyl, 2,2 '-HOC6H4C6H4OH (2) were reacted. 2, 2 '-biphenoxy thiophosphinic chloride (3) was obtained from this reaction. Second, the reactions of compound (3) with sterically hindered phenol derivatives (4a-4h) were investigated. Novel alkyl-substituted phenyl 2, 2 '-biphenyl-thiophosphinate esters (C6H4O)(2)P(S)OAr (5-12) were obtained from these reactions. Structures of (5-12) were defined by IR, H-1, C-13, P-31 NMR spectroscopy, and elemental analysis. The molecular structures of 2, 2 '-biphenyl 4-tert-butylphenyl thiophosphinate (11) and 2, 2 '-biphenyl 3,4-di-methylphenyl thiophosphinate (6) were determined by single-crystal X-ray diffraction. Density functional theory (DFT) calculations of compounds 6 and 11 were made. The theoretical analysis of IR and NMR spectra was performed by DFT based on B3LYP level of theory.
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    The syntheses of 2-hydroxybenzothiazole substituted cyclotriphosphazenes: Spectroscopic characterizations
    (Taylor & Francis Ltd, 2024) Begec, Saliha
    The nucleophilic substitution reactions of mono- and bis-spiro-2,2'-dioxybiphenyl cyclotriphosphazenes (1a and 1b) with 2-hydroxybenzothiazole (2) were performed in the presence of metallic sodium in THF. Two novel 2-oxybenzothiazole-substituted spiro-2,2 '-dioxybiphenyl cyclotriphosphazene derivatives (3a and 3b) were obtained from these reactions. Both compounds (3a, 3b) have been characterized by elemental analysis as well as by H-1, C-13 and P-31 NMR spectroscopy. Compounds 3a and 3b are reported for the first time in this study.
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    Synthesis and characterization of aryltriphenylsilyl ethers and crystal structure of 2,4,6-tri-methylphenyl triphenylsilyl ether
    (Taylor & Francis Ltd, 2013) Begec, Saliha; Kilic, Adem; Yuksel, Fatma; Alatas, Suemeyya; Kan, Nilay
    Synthesis and structures of aryl triphenylsilyl ether derivatives are reported. Reactions of chlorotriphenylsilane, (C6H5)(3)SiCl (1), with sodium salts of sterically hindered phenol derivatives (2a-2i) were investigated. Aryltriphenylsilyl ethers (C6H5)(3)SiOAr (3-8) were obtained from these reactions. Structures of 3-8 were defined by IR, H-1, C-13, Si-29 NMR spectroscopy, elemental analysis, and ESI-MS spectra. The molecular structure of 2,4,6-tri-methylphenyl triphenylsilyl ether (6) were determined by single-crystal X-ray diffraction.
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    Synthesis and characterization of new spiro cyclotriphosphazene derivatives
    (Elsevier, 2022) Begec, Saliha
    In the present study, reactions of spiro-N,N-diisopropylpropane-1,3-diamino-2,2-4,4 tetrachlorocyclotriphosphazatriene (1) with 2,2'-dihydroxybiphenyl (2), and 3-amino-1-propanol (3) have been investigated. Dispiro (4, 6) and trispiro (5) phosphazene derivatives were obtained from these reactions. New spirocyclotriphosphazenes (4-6) were characterized by elemental analysis, H-1, C-13 and P-31 NMR spectroscopy.
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    SYNTHESIS AND CHARACTERIZATION OF NOVEL ALKYL-SUBSTITUTED ARYL DIPHENYLPHOSPHINATE ESTERS
    (Taylor & Francis Ltd, 2011) Begec, Saliha; Alatas, Sumeyya; Kilic, Adem
    In this work, the reactions of diphenylphosphinic chloride, (C6H5)(2)P(O)Cl, 1, with the sodium salts of sterically hindered phenol derivatives (2a-2j) were investigated. Novel alkyl-substituted aryl diphenyl phosphinate esters (C6H5)(2)P(O)OAr (3-12) were obtained from these reactions. Satisfactory analytical and spectroscopic results were obtained for all the new compounds.
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    Synthesis and characterization of oxime-bearing hexakis(2-formylphenoxy)-phosphazene and its derivatives
    (John Wiley & Sons Inc, 2007) Pamukci, Orhan; Cil, Erol; Begec, Saliha; Arslan, Mustafa
    Hexakis (2-formylphenoxy)cyclotrlphosphazene (2) was obtained from the reaction of hexachlorocylotriphosphazene (1) with 2-hydroxybenzaldehyde. Hexakis (2-[(hydroxyimino) methyl]phenoxy)cyclotriphosphazene (3) was synthesized from the reaction of 2 with hydroxlaminehydrochloride in pyridine. Hexasubstituted compounds 4, 5, 6, 8, 9, and 10 were obtained from the reactions of 3 with methyl iodide, ethyl bromide, allyl bromide, propanoyl chloride, benzoyl chloride, and 4-methoxybenzoyl chloride, respectively. Disubstituted product 7 was obtained from the reaction of 3 with chloroacetyl chloride. Pure and defined products could not be obtained from the reaction of 3 with acetyl chloride, benzyl chloride, and 2-chlorobenzoyl chloride. The compounds were characterized by elemental analysis and IR, H-1, C-13, and P-31 NMR spectroscopy. (c) 2007 Wiley Periodicals, Inc.
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    Synthesis and structural characterization of N,N-spiro cyclotriphosphazene derivatives with one stereogenic center
    (Taylor & Francis Ltd, 2023) Begec, Saliha
    In this study, N,N-spiro cyclotriphosphazene derivatives (1a-4a) with one stereogenic center were synthesized in two steps. Firstly; mono substituted phosphazene compounds [N3P3Cl5NHC6H5 (1), N3P3Cl5OC5H4N (2), N3P3Cl5OC6H2-Me-2,4,6 (3), N3P3Cl5OC6H2-Bu-t-2-Me-4 (4)] were prepared. Secondly, these compounds (1-4) were allowed to react with symmetrical difunctional reagent N,N '-diisopropylpropane-1,3-diamine to obtain cyclotriphosphazenes having one stereogenic center. The reaction of N3P3Cl5XAr (1-4) with N,N '-diisopropylpropane-1,3-diamine was carried out in dichloromethane. Four new N,N-spiro phosphazene compounds (1a-4a) which have one stereogenic center were obtained from these reactions. The structures of these compounds were characterized by H-1, C-13 and P-31 NMR spectrometry and elemental analyses.