Browsing by Author "Hosgoren, Halil"
Now showing items 1-20 of 21
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Asymmetric Organocatalytic Efficiency of Synthesized Chiral ?-Amino Alcohols in Ring-Opening of Glycidol with Phenols
Aral, Tarik; Karakaplan, Mehmet; Hosgoren, Halil (Springer, 2012)A series of novel chiral beta-amino alcohols 3-5 and 7-10 were synthesized by regioselective ring opening of epoxides and chiral amines with a straightforward method in high yields (up to 99 %). Kinetic resolution of racemic ... -
Catalytic properties of heteropoly acid H3PW12O40 supported-on Turkish bentonite
Tonbul, Yalcin; Hosgoren, Halil (Asian Journal Of Chemistry, 2008)Catalysts based on tungstophosphoric acid on Turkish bentonite were obtained. The influence of the heteropoly acid content, in five different concentrations, was studied. The catalysts have been characterized using gas ... -
Chiral lariat ethers as membrane carriers for chiral amino acids and their sodium and potassium salts
Aydin, Isil; Aral, Tarik; Karakaplan, Mehmet; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2009)Four chiral lariat ethers 8-11 containing a (p-methoxyphenoxy) methyl side arm were used for chiral discrimination of amino acids in their zwitterionic form or as potassium and sodium salts in transport across a bulk ... -
Chiral separation of amino acids using a chiral crown ether by impregnation on a polymeric support and monoamine modified silica gel
Seyhan, Serap; Turgut, Yilmaz; Merdivan, Melek; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2006)A chiral monoaza-15-crown-5 ether derivative was prepared from L-Leucinol and used as a chiral stationary phase. The new chiral stationary phases CSP-1 and CSP-2 were employed in separating the enantiomers of the sodium ... -
The enantiomeric recognition of chiral organic ammonium salts by chiral pyridino-macrocycles bearing aminoalcohol subunits
Ozer, Hayriye; Kocakaya, Safak Ozhan; Akgun, Abuzer; Hosgoren, Halil; Togrul, Mahmut (Pergamon-Elsevier Science Ltd, 2009)Pyridine-based macrocycles were prepared by treating 2,6-bis[[2'6'-bis(bromomethyl)-4'-methylphenoxy]methyl]pyridine 3 with the appropriate chiral aminoalcohols. The enantiomeric recognition of these macrocycles bearing ... -
Enantioselective complexation of chiral lariat crown ethers and chiral primary alkylammonium perchlorates
Koylu, M. Zafer; Aral, Tarik; Karakaplan, Mehmet; Kocakaya, Safak Ozhan; Hosgoren, Halil (Tubitak Scientific & Technological Research Council Turkey, 2011)In order to investigate the enantiomeric recognition abilities toward 2 chiral alkylammonium perchlorates (AmI, AmII) by H-1-NMR titration method in CDCl3, 4 chiral lariat ethers 8-11 with a (p-methoxyphenoxy) methyl ... -
?-Hydroxyamide derivatives of salicylic acid as organocatalysts for enantioselective reductions of prochiral ketones
Turgut, Yilmaz; Azizoglu, Murat; Erdogan, Asli; Arslan, Nevin; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2013)In order to find the most effective catalyst for the enantioselective reduction of a prochiral ketone, a series of novel beta-hydroxyamide derivatives of salicylic acid and chiral amino alcohols were synthesized. Different ... -
Improvement of Synthesis and Dielectric Properties of Polyurethane/Mt-QASs+ (Novel Synthesis)
Baysal, Gulay; Aydin, Haluk; Hosgoren, Halil; Uzan, Serhat; Karaer, Hatice (Springer, 2016)Polyurethane-based nanocomposites were prepared and their dielectric properties were characterized. Polyurethane (PU) composites were prepared with different organoclay content (1, 3, 5, and 10 wt% for all cases). The ... -
Investigation of Antimicrobial Properties of QASs+ (Novel Synthesis)
Baysal, Gulay; Aydin, Haluk; Uzan, Serhat; Hosgoren, Halil (Maik Nauka/Interperiodica/Springer, 2018)Quaternary ammonium salts (QASs) are bioactive materials known for their antimicrobial effects. However, it is difficult to provide desirable quaternary ammonium salts. Thus, firstly new quarternary ammonium salts which ... -
Investigation of some 1,3-diols for the requirements of solvent extraction of boron: 2,2,6-trimethyl-1,3 heptanediol as a potential boron extractant
Tural, Bilsen; Tural, Servet; Hosgoren, Halil (Tubitak Scientific & Technological Research Council Turkey, 2007)Eighteen 1,3-diols were syntesized and their structure and distribution ratio for the solvent extraction of boron were studied. Diols with a high distribution ration (DB(OH)3 > 10) were investigated for the requirements ... -
Novel bis(aminoalcohol)oxalamide organogelators and their diglycolylamide analogs: evaluation of gelation efficiency in various organic fluids
Colak, Mehmet; Baris, Deniz; Pirinccioglu, Necmettin; Hosgoren, Halil (Tubitak Scientific & Technological Research Council Turkey, 2017)Three modular types of bis(aminoalcohol)oxalamides (1, 4, and 7) and bis(aminoalcohol)diglycolylamide (8) gelators have been prepared by the reaction of the respective aminoalcohols with oxalyl and digycolyl methylesters ... -
Novel C2-symmetric macrocycles bearing diamide-diester groups
Sunkur, Murat; Baris, Deniz; Hosgoren, Halil; Togrul, Mahmut (Amer Chemical Soc, 2008)We synthesized a series of novel macrocycles with diamide-diester groups (S,S)-1, (S,S)-2, (S,S)-3, and (R,R)-1, derived from dimethyloxalate and amino alcohols by high dilution technique, and evaluated enantiomeric ... -
Organogels as novel carriers for dermal and topical drug delivery vehicles
Uzan, Serhat; Baris, Deniz; Colak, Mehrnet; Aydin, Haluk; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2016)Aminoalcohol based bis-(aminoalcohol)oxalamides (BAOAs) (1,6-amino alcohol=leucinol, isoleucinol, valinol, phenyiglycinol, phenylalaninol and 2-amino-1-butanol) have been explored to develop drug depot systems and illustrated ... -
Polymer supported 5,10,15,20-tetrakis(phenoxy acetic acid)porphyrin derivative for separation and preconcentration of d- and f-electron metals
Seyhan, Serap; Merdivan, Melek; Demirel, Nadir; Hosgoren, Halil (Springer Wien, 2008)5,10,15,20-tetrakis(phenoxy acetic acid) porphyrin (PAAP) was covalently linked to Merrifield chloromethylated resin. Characterization of PAAP and the modified polymeric matrix were performed by H-1 NMR, FTIR and elemental ... -
Pyridine containing chiral macrocycles: synthesis and their enantiomeric recognition for amino acid derivatives
Deniz, Pinar; Turgut, Yilmaz; Togrul, Mahmut; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2011)Four novel C(2)-symmetric enantiomerically pure, chiral pyridine-18-crown-6 type macrocycles containing lipophilic chains at the stereogenic centers were prepared. The enantioselectivity of the new ligands toward the ... -
A series of novel ?-hydroxyamide based catalysts for borane-mediated enantioselective reductions of prochiral ketones
Azizoglu, Murat; Erdogan, Asli; Arslan, Nevin; Turgut, Yilmaz; Hosgoren, Halil; Pirinccioglu, Necmettin (Pergamon-Elsevier Science Ltd, 2016)The enantioselective reduction of prochiral ketones with borane in the presence of a chiral ligand has received considerable attention. Hydroxylamine-based chiral ligands with amide and hydroxyl functions in the presence ... -
The synthesis and formation of complexes between derivatives of chiral Aza-18-crown-6 ethers and chiral primary organic ammonium salts
Karakaplan, Mehmet; Turgut, Yilmaz; Aral, Tarik; Hosgoren, Halil (Springer, 2006)Chiral mono aza-18-crown-6 derivatives have been prepared in optically active form and high yield from amino alcohols via a cyclization reaction with tetraethylene glycol ditosylate. The enantiomeric recognition by these ... -
Synthesis of C2-Symmetric Chiral Amino Alcohols: Their Usage as Organocatalysts for Enantioselective Opening of Epoxide Ring
Turgut, Yilmaz; Aral, Tarik; Karakaplan, Mehmet; Deniz, Pinar; Hosgoren, Halil (Taylor & Francis Inc, 2010)A series of -amino alcohols derivatives were synthesized from (R)-2-amino-1-butanol and (S)-1,2-propanediol, and they have been used as organocatalaysts in the racemic ring opening of epoxide in good yields with high ... -
Synthesis of new diaza-18-crown-6 ethers derived from trans-(R,R)-1,2-diaminocyclohexane and investigation of their enantiomeric discrimination ability with amino acid ester salts
Karakaplan, Mehmet; Ak, Devran; Colak, Mehmet; Kocakaya, Safak Ozhan; Hosgoren, Halil; Pirinccioglu, Necmettin (Pergamon-Elsevier Science Ltd, 2013)The synthesis of four diaza-18-crown-6 ethers with C-2-symmetry derived from trans-(R,R)-1,2-diaminocyclohexane bearing methyl, phenyl and phenoxymethyl moeities attached to a stereogenic centre on the crown ring were ... -
Synthesis of novel C2-symmetric chiral crown ethers and investigation of their enantiomeric recognition properties
Turgut, Yilmaz; Aral, Tarik; Hosgoren, Halil (Pergamon-Elsevier Science Ltd, 2009)A series of new C-2-symmetric chiral aza crown ether macrocycles 1-4 have been synthesized from (S)-3-aryloxy-1,2-propanediol and (S)-1,2-propanediol for the enantiomeric recognition of amino acid ester derivatives. These ...
